A model for persistent hole burned spectra and hole growth kinetics that includes photoproduct absorption: Application to free base phthalocyanine in hyperquenched glassy ortho-dichlorobenzene at 5 K
| Autor: | T. Reinot, N. C. Dang, G. J. Small |
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| Rok vydání: | 2003 |
| Předmět: | |
| Zdroj: | The Journal of Chemical Physics. 119:10404-10414 |
| ISSN: | 1089-7690 0021-9606 |
| DOI: | 10.1063/1.1605371 |
| Popis: | Persistent nonphotochemical and photochemical hole burning of the S0→S1 origin absorption bands of chromophores in amorphous hosts such as glasses, polymers and proteins at low temperatures have been used to address a number of problems that range from structural disorder and configurational tunneling to excitation energy transfer and charge separation in photosynthetic complexes. Often the hole burned spectra are interfered by photoproduct (antihole) absorption. To date there has been no systematic approach to modeling hole burned spectra and the dispersive kinetics of zero-phonon hole growth that accounts for the antihole. A “master” equation that does so is presented. A key ingredient of the equation is a time-dependent, two-dimensional site excitation frequency distribution function (SDF) of the zero-phonon lines. Prior to hole burning (t=0) the SDF is that of the educt sites. For t>0 the SDF describes both educt and photoproduct sites and allows for burning of the latter that revert to the educt site... |
| Databáze: | OpenAIRE |
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