Excited-state proton transfer in 2-(2'-hydroxyphenyl)benzothiaxole (HBT) dissolved in pyridine is investigated. New absorptions and fluorescence bands are detected after addition of water or NaOH to the solution. The spectra are identical to the HBT anion absorption and fluorescence. Picosecond spec
Excited-state intramolecular proton transfer in polar solutions of 2-(2′-hydroxyphenyl)benzothiazole
✍ Scribed by Charles A.S. Potter; Robert G. Brown
- Publisher
- Elsevier Science
- Year
- 1988
- Tongue
- English
- Weight
- 363 KB
- Volume
- 153
- Category
- Article
- ISSN
- 0009-2614
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The femtosecond kinetics associated with intramolecular proton transfer in the electronically excited state of aromatic molecules is investigated. The initial enol structure of 2-(2'-hydroxyphenyl)benzothiazole (HBT) is excited by a femtosecond UV pulse at 3 15 nm and the risetime of the emission of
Spectral characteristics and prototropic reactions of 2-(2'-hydroxyphenyl)benzimidazole (HPBI) in Tween-20, Tween-40, Tween-60, Tween-80, and dioxane-water mixtures of different compositions have been studied. Comparison of the fluorescence band maxima of the tautomer band in nonionic micelles with
Transient absorption spectra of 2-(2'-hydroxyphenyl)benzothiazole (HBT) were studied in various solvents after picosecond excitation, Strong absorption bands are observed in the wavelength range from 400 to 500 nm. The kinetics of the absorption change consists of a first component with a decay time