Subpicosecond pump–probe measurements of the ...
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| Title | Subpicosecond pump–probe measurements of the electronic relaxation rates of the S1 states of azulene and related compounds in polar and nonpolar solvents |
| Author(s) | B. Wagner, M. Szymanski, R. Steer |
| Journal | Journal of Chemical Physics |
| Date | 1993 |
| Volume | 98 |
| Issue | 1 |
| Start page | 301 |
| End page | 307 |
| Abstract | The lifetimes of the S1 states of azulene, azulene-d8, 4,6,8-trimethylazulene, and guaiazulene (1,4-dimethyl-7-isopropylazulene) have been measured in three nonviscous solvents of different polarity and structure using a two-photon, two-color, pump-probe method with subpicosecond time resolution. A significant solvent effect is measured. The rate constants for S1 --> S0 internal conversion in all four compounds in all three solvents exhibit one common S1-S0 energy gap law correlation, indicating that variations in the electronic relaxation rates are governed exclusively by changes in the Franck-Condon factors for the transition. No effect is observed when the exciting wavelength is changed, indicating that vibrational relaxation is occurring on a time scale which is faster than that of electronic relaxation in these systems. No significant deuterium isotope effect is measured in azulene, indicating that high frequency C-H(D) stretching vibrations do not act as significant accepting modes in the radiationless transition. |
| ISSN | 0021-9606 |
| Use/Reproduction | Contact Publisher |
| Text | http://www.islandscholar.ca/download_ds/ir:ir-batch6-1359/PDF |
Using APA 6th Edition citation style.
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