The static and transient fluorescence spectroscopy of 3-hydroxyflavone, 3HF, has been investigated as a function of deuteration of the 3-hydroxy group and the solvent. Small H/D isotope effects are observed for at least two of the simple rate constants for the excited-state dynamics. The isotope eff
Excitation energy dependence on the intramolecular excited-state proton transfer of 3-hydroxyflavone in the vapor phase
β Scribed by Michiya Itoh; Hiroko Kurokawa
- Publisher
- Elsevier Science
- Year
- 1982
- Tongue
- English
- Weight
- 290 KB
- Volume
- 91
- Category
- Article
- ISSN
- 0009-2614
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A singk exponential risetime is observed for the tautomcr fluoresccncc of 3-hydroxyflavom in the absence of hydrogcnbonding impuriticsin the temperature range of 298-77 K. The observed risetime in hydrocarbon solvents is Its than 8 ps at 298 K. while at 77 K it is 37 2 6 ps. The disucpnncy with othe
The keto-type reaction product of intramolecular proton transfer in the excited state of 2-(2'-hydroxy-5'methylphenyl)benzotriazole is investigated by femtosecond experiments in a wide spectral range. Keto-type molecules produced on a 100 fs time scale show an emission band between 600 and 800 nm th