期刊
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
卷 11, 期 25, 页码 5019-5027出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/b819585d
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资金
- Deutsche Forschungsgemeinschaft [SFB 749]
- NIH/NIGMS [S06GM008205, SC3GM084752]
- NATIONAL INSTITUTE OF GENERAL MEDICAL SCIENCES [S06GM008205, SC3GM084752] Funding Source: NIH RePORTER
The ring-opening reaction of a trifluorinated indolylfulgide has been studied as a function of temperature and optical pre-excitation where it was found that reaction times decreased as temperature increased from 10.3 ps at 12 degrees C to 7.6 ps at 60 degrees C. Simultaneously, the quantum yields for the ring-opening reaction grew from 3.1% (12 degrees C) to 5.0% (60 degrees C). When the reaction was started from a non-equilibrium state generated by a directly preceding ring-closure process, the ring-opening reaction became faster and the quantum efficiency increased by more than a factor of three. Analysis of the experimental results points to mode-specific photochemistry in that the promoting, photochemically active modes of the photoreaction are efficiently excited by the directly preceding ring-closure reaction.
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