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Fluorescence quenching of pyrene monomer and excimer by CH3I
| Content Provider | Semantic Scholar |
|---|---|
| Author | Martinho, J. M. Gaspar Sousa, A. T. Reis E Torres, Marta E. Fedorov, Andrei |
| Copyright Year | 2001 |
| Abstract | Abstract The fluorescence quenching rate constants of pyrene monomer and excimer by CH 3 I were obtained at several temperatures in methylcyclohexane. Both quenching processes are kinetically controlled, allowing insight on the mechanism of quenching. The rate constants have both temperature-independent and temperature-dependent components. The temperature-independent component for both monomer and excimer fluorescence is consistent with quenching due to enhanced intersystem crossing to a lower energy triplet state. The monomer temperature-dependent component comes from the enhancement of the intersystem crossing to a higher energy triplet state. The thermally activated excimer quenching is associated with the excimer dissociation step to give a pyrene in a second triplet state plus a ground state pyrene molecule. |
| Starting Page | 111 |
| Ending Page | 121 |
| Page Count | 11 |
| File Format | PDF HTM / HTML |
| DOI | 10.1016/S0301-0104(00)00385-2 |
| Volume Number | 264 |
| Alternate Webpage(s) | https://web.ist.utl.pt/ist10984/PDF/2001/Chem%20Phys%20264_111-121_2001.pdf |
| Alternate Webpage(s) | https://doi.org/10.1016/S0301-0104%2800%2900385-2 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
