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Fluorescence Process - Revision history
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Cmditradmin: /* Absorption */
2010-08-10T19:06:02Z
<p><span dir="auto"><span class="autocomment">Absorption</span></span></p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 12:06, 10 August 2010</td>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Light absorption is characterized by k<sub>abs</sub> and occurs on a time scale of ~10<sup>15</sup> sec<sup>-1</sup>. Because the mass of the electron is much less than that of the nuclei, a good approximation is that the nuclei remain fixed on the time-scale of light absorption and then relax to new equilibrium geometries subsequent to the absorption process (Franck-Condon approximation) When looking at the electromagnetic spectrum, it is important to consider the absorption by &pi; conjugated molecules of two or three eV in the visible. The frequency related to a photon that has an energy of 1 eV or a few 10<sup>14</sup>. This means that three electron volts results in a frequency of 10<sup>15</sup>. This immediately shows the time scale for absorption. Absorption of a photon with a few eV occurs on a time scale on the order of a femptosecond or a rate of 10<sup>15</sup> per second.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Light absorption is characterized by k<sub>abs</sub> and occurs on a time scale of ~10<sup>15</sup> sec<sup>-1</sup>. Because the mass of the electron is much less than that of the nuclei, a good approximation is that the nuclei remain fixed on the time-scale of light absorption and then relax to new equilibrium geometries subsequent to the absorption process (Franck-Condon approximation) When looking at the electromagnetic spectrum, it is important to consider the absorption by &pi; conjugated molecules of two or three eV in the visible. The frequency related to a photon that has an energy of 1 eV or a few 10<sup>14</sup>. This means that three electron volts results in a frequency of 10<sup>15</sup>. This immediately shows the time scale for absorption. Absorption of a photon with a few eV occurs on a time scale on the order of a femptosecond or a rate of 10<sup>15</sup> per second.</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>See <del style="font-weight: bold; text-decoration: none;">Wikipedia </del>[<del style="font-weight: bold; text-decoration: none;">http</del>:<del style="font-weight: bold; text-decoration: none;">//en.wikipedia.org/wiki/</del>Franck%E2%80%93Condon_principle <del style="font-weight: bold; text-decoration: none;">Franck-Condon Principle</del>]</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>See [<ins style="font-weight: bold; text-decoration: none;">[wikipedia</ins>:Franck%E2%80%93Condon_principle<ins style="font-weight: bold; text-decoration: none;">]</ins>]</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>One promising technology is the use of [[Gold Nanoparticles – Surface Plasmon Resonance |gold nanoparticles]] which exhibit surface plasmon resonance that greatly increases absorption in the visible range.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>One promising technology is the use of [[Gold Nanoparticles – Surface Plasmon Resonance |gold nanoparticles]] which exhibit surface plasmon resonance that greatly increases absorption in the visible range.</div></td></tr>
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Cmditradmin
http://cleanenergywiki.org/index.php?title=Fluorescence_Process&diff=5944&oldid=prev
Cmditradmin at 20:03, 29 December 2009
2009-12-29T20:03:30Z
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 13:03, 29 December 2009</td>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><table id="toc" style="width: 100%"></div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><table id="toc" style="width: 100%"></div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">[[category:luminescence]]</ins></div></td></tr>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><tr></div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><tr></div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><td style="text-align: left; width: 33%">[[Jablonksi Diagram|Previous Topic]]</td></div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><td style="text-align: left; width: 33%">[[Jablonksi Diagram|Previous Topic]]</td></div></td></tr>
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Cmditradmin
http://cleanenergywiki.org/index.php?title=Fluorescence_Process&diff=5016&oldid=prev
128.95.39.42: /* Absorption */
2009-09-21T21:11:29Z
<p><span dir="auto"><span class="autocomment">Absorption</span></span></p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 14:11, 21 September 2009</td>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>See Wikipedia [http://en.wikipedia.org/wiki/Franck%E2%80%93Condon_principle Franck-Condon Principle]</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>See Wikipedia [http://en.wikipedia.org/wiki/Franck%E2%80%93Condon_principle Franck-Condon Principle]</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>One promising technology is the use of [[Gold Nanoparticles – Surface Plasmon Resonance |<del style="font-weight: bold; text-decoration: none;">Gold </del>nanoparticles]] which exhibit surface plasmon resonance that greatly increases absorption in the visible range.</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>One promising technology is the use of [[Gold Nanoparticles – Surface Plasmon Resonance |<ins style="font-weight: bold; text-decoration: none;">gold </ins>nanoparticles]] which exhibit surface plasmon resonance that greatly increases absorption in the visible range.</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>=== Internal Conversion ===</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>=== Internal Conversion ===</div></td></tr>
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128.95.39.42
http://cleanenergywiki.org/index.php?title=Fluorescence_Process&diff=5015&oldid=prev
128.95.39.42: /* Absorption */
2009-09-21T21:11:04Z
<p><span dir="auto"><span class="autocomment">Absorption</span></span></p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 14:11, 21 September 2009</td>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>See Wikipedia [http://en.wikipedia.org/wiki/Franck%E2%80%93Condon_principle Franck-Condon Principle]</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>See Wikipedia [http://en.wikipedia.org/wiki/Franck%E2%80%93Condon_principle Franck-Condon Principle]</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>One promising technology is the use of [[<del style="font-weight: bold; text-decoration: none;">Gold nanoparticles | </del>Gold Nanoparticles – Surface Plasmon Resonance]] which exhibit surface plasmon resonance that greatly increases absorption in the visible range.</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>One promising technology is the use of [[Gold Nanoparticles – Surface Plasmon Resonance <ins style="font-weight: bold; text-decoration: none;">|Gold nanoparticles</ins>]] which exhibit surface plasmon resonance that greatly increases absorption in the visible range.</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>=== Internal Conversion ===</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>=== Internal Conversion ===</div></td></tr>
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128.95.39.42
http://cleanenergywiki.org/index.php?title=Fluorescence_Process&diff=5014&oldid=prev
128.95.39.42 at 21:10, 21 September 2009
2009-09-21T21:10:31Z
<p></p>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>See Wikipedia [http://en.wikipedia.org/wiki/Franck%E2%80%93Condon_principle Franck-Condon Principle]</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>See Wikipedia [http://en.wikipedia.org/wiki/Franck%E2%80%93Condon_principle Franck-Condon Principle]</div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">One promising technology is the use of [[Gold nanoparticles | Gold Nanoparticles – Surface Plasmon Resonance]] which exhibit surface plasmon resonance that greatly increases absorption in the visible range.</ins></div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>=== Internal Conversion ===</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>=== Internal Conversion ===</div></td></tr>
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128.95.39.42
http://cleanenergywiki.org/index.php?title=Fluorescence_Process&diff=4968&oldid=prev
Cmditradmin: /* Absorption */
2009-09-15T19:56:29Z
<p><span dir="auto"><span class="autocomment">Absorption</span></span></p>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[Image:Jablonski.png|thumb|300px|Various transitions have characteristic time scales]]</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[Image:Jablonski.png|thumb|300px|Various transitions have characteristic time scales]]</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Light absorption is characterized by k<sub>abs</sub> and occurs on a time scale of ~10<sup>15</sup> sec<sup>-1</sup>. Because the mass of the electron is much less than that of the nuclei, a good approximation is that the nuclei remain fixed on the time-scale of light absorption and then relax to new equilibrium geometries subsequent to the absorption process (Franck-Condon approximation) When looking at the electromagnetic spectrum, it is important to consider the absorption by &pi; conjugated molecules of two or three eV in the visible. The frequency related to a photon that has an energy of 1 eV or a few 10<sup>14</sup>. This means that three electron volts results in a frequency of 10<sup>15</sup>. This immediately shows the time scale for absorption. Absorption of a photon with a few eV occurs on a time scale on the order of a femptosecond or a rate of 10<sup>15</sup> per second.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Light absorption is characterized by k<sub>abs</sub> and occurs on a time scale of ~10<sup>15</sup> sec<sup>-1</sup>. Because the mass of the electron is much less than that of the nuclei, a good approximation is that the nuclei remain fixed on the time-scale of light absorption and then relax to new equilibrium geometries subsequent to the absorption process (Franck-Condon approximation) When looking at the electromagnetic spectrum, it is important to consider the absorption by &pi; conjugated molecules of two or three eV in the visible. The frequency related to a photon that has an energy of 1 eV or a few 10<sup>14</sup>. This means that three electron volts results in a frequency of 10<sup>15</sup>. This immediately shows the time scale for absorption. Absorption of a photon with a few eV occurs on a time scale on the order of a femptosecond or a rate of 10<sup>15</sup> per second.</div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">See Wikipedia [http://en.wikipedia.org/wiki/Franck%E2%80%93Condon_principle Franck-Condon Principle]</ins></div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>=== Internal Conversion ===</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>=== Internal Conversion ===</div></td></tr>
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Cmditradmin
http://cleanenergywiki.org/index.php?title=Fluorescence_Process&diff=4967&oldid=prev
Cmditradmin: /* External Links */
2009-09-15T19:56:19Z
<p><span dir="auto"><span class="autocomment">External Links</span></span></p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 12:56, 15 September 2009</td>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Phosphorescence is the process by which light is emitted when a triplet excited state relaxes down to a singlet ground state. The time range for phosphorescence can be up to days, and the fastest can be in the microsecond range. It is possible to have significant phosphorescence in complexes with heavy metals in the microsecond range. For the molecules that will be discussed most of the time, fluorescence will be in nanoseconds, phosphorescence will be in microseconds or longer. Since processes involving change of spin angular momentum are quantum mechanically forbidden, the probability of phosphorescence is low and the rate constant for phosphorescence is typically very small, 10<sup>-2</sup> – 10<sup>4</sup> sec<sup>-1</sup>.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Phosphorescence is the process by which light is emitted when a triplet excited state relaxes down to a singlet ground state. The time range for phosphorescence can be up to days, and the fastest can be in the microsecond range. It is possible to have significant phosphorescence in complexes with heavy metals in the microsecond range. For the molecules that will be discussed most of the time, fluorescence will be in nanoseconds, phosphorescence will be in microseconds or longer. Since processes involving change of spin angular momentum are quantum mechanically forbidden, the probability of phosphorescence is low and the rate constant for phosphorescence is typically very small, 10<sup>-2</sup> – 10<sup>4</sup> sec<sup>-1</sup>.</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">== External Links ==</del></div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">See Wikipedia [http://en.wikipedia.org/wiki/Franck%E2%80%93Condon_principle Franck-Condon Principle]</del></div></td><td colspan="2" class="diff-side-added"></td></tr>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><table id="toc" style="width: 100%"></div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><table id="toc" style="width: 100%"></div></td></tr>
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Cmditradmin
http://cleanenergywiki.org/index.php?title=Fluorescence_Process&diff=4966&oldid=prev
Cmditradmin: /* Fluoresence */
2009-09-15T19:54:33Z
<p><span dir="auto"><span class="autocomment">Fluoresence</span></span></p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 12:54, 15 September 2009</td>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Fluorescence is the process by which the molecule that has singlet spin multiplicity in an excited state loses energy (typically back to its ground state) with emission of light it is characterized by k<sub>fl</sub> which is typically on the time scale of ~ 10<sup>6</sup> -10<sup>9</sup> sec<sup>-1</sup></div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Fluorescence is the process by which the molecule that has singlet spin multiplicity in an excited state loses energy (typically back to its ground state) with emission of light it is characterized by k<sub>fl</sub> which is typically on the time scale of ~ 10<sup>6</sup> -10<sup>9</sup> sec<sup>-1</sup></div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>A molecule that cannot intersystem cross (can not go to the triplet state)<del style="font-weight: bold; text-decoration: none;">, then so it </del>will remain in that singlet S<sub>1</sub> state and then it will eventually go back to the ground state radiatively or non-radiatively.</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>A molecule that cannot intersystem cross (can not go to the triplet state) will remain in that singlet S<sub>1</sub> state and then it will eventually go back to the ground state radiatively or non-radiatively.</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>The rate at which it goes back to the ground state radiatively over all the rates (or processes) that can take place non-<del style="font-weight: bold; text-decoration: none;">raditivaely </del>or radiatively, going to the triplet and so on, gives you the '''<del style="font-weight: bold; text-decoration: none;">fluorescnece </del>quantum yield''' ( Ø<sub>fl</sub>) for all processes leading to loss of excited state population. </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>The rate at which it goes back to the ground state radiatively over all the rates (or processes) that can take place non-<ins style="font-weight: bold; text-decoration: none;">radiatively </ins>or radiatively, going to the triplet and so on, gives you the '''<ins style="font-weight: bold; text-decoration: none;">fluorescence </ins>quantum yield''' ( Ø<sub>fl</sub>) for all processes leading to loss of excited state population. </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>:<math>\phi = \frac {photon \, emitted} {photon \, absorbed} = \frac {k_{fl} } {\sum {k}}\,\!</math></div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>:<math>\phi = \frac {photon \, emitted} {photon \, absorbed} = \frac {k_{fl} } {\sum {k}}\,\!</math></div></td></tr>
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Cmditradmin
http://cleanenergywiki.org/index.php?title=Fluorescence_Process&diff=4549&oldid=prev
Cmditradmin at 21:00, 1 September 2009
2009-09-01T21:00:03Z
<p></p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 14:00, 1 September 2009</td>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">Photonic </ins>processes <ins style="font-weight: bold; text-decoration: none;">include </ins>absorption of light, fluorescence, internal conversion, intersystem crossing and phosphorescence<ins style="font-weight: bold; text-decoration: none;">. Each process involves the movement of quantized energy and each process has a characteristic energy range and timescale described by a rate constant</ins>. </div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">== Time Scales ==</del></div></td><td colspan="2" class="diff-side-added"></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">Several </del>processes <del style="font-weight: bold; text-decoration: none;">are illustrated and are indicated by the rate constants that characterize the processes shown, including </del>absorption of light, fluorescence, internal conversion, intersystem crossing and phosphorescence.</div></td><td colspan="2" class="diff-side-added"></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>=== Absorption ===</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>=== Absorption ===</div></td></tr>
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Cmditradmin
http://cleanenergywiki.org/index.php?title=Fluorescence_Process&diff=4533&oldid=prev
Cmditradmin: /* Phosphorescence */
2009-08-31T23:15:46Z
<p><span dir="auto"><span class="autocomment">Phosphorescence</span></span></p>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>=== Phosphorescence ===</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>=== Phosphorescence ===</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>Phosphorescence is the process by which light is emitted when a triplet excited state relaxes down to a singlet ground state. The time range for phosphorescence can be up to days, and the fastest can be in the microsecond range. It is possible to have significant phosphorescence in complexes with heavy metals in the microsecond range. For the molecules that will be discussed most of the time, fluorescence will be in nanoseconds, phosphorescence will be in microseconds or longer. Since processes involving change of spin angular momentum are quantum mechanically forbidden, the probability of phosphorescence is low and the rate constant for phosphorescence is typically very small, 10<sup>-2</sup> – 10<sup><del style="font-weight: bold; text-decoration: none;">-</del>4</sup> sec<sup>-1</sup>.</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>Phosphorescence is the process by which light is emitted when a triplet excited state relaxes down to a singlet ground state. The time range for phosphorescence can be up to days, and the fastest can be in the microsecond range. It is possible to have significant phosphorescence in complexes with heavy metals in the microsecond range. For the molecules that will be discussed most of the time, fluorescence will be in nanoseconds, phosphorescence will be in microseconds or longer. Since processes involving change of spin angular momentum are quantum mechanically forbidden, the probability of phosphorescence is low and the rate constant for phosphorescence is typically very small, 10<sup>-2</sup> – 10<sup>4</sup> sec<sup>-1</sup>.</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>== External Links ==</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>== External Links ==</div></td></tr>
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