Picosecond time-resolved fluorescence spectra of all-trans retinal in hexane have been measured with 8 ps time-resolution with use of a highly sensitive streak camera. The observed fluorescence consists of a fast (r < 1 ps, ,h.ma x m 470 nm) and a slow (r = 33-34 ps, Ama x --540 nm) component. The l
Picosecond fluorescence relaxation kinetics from all-trans retinal
β Scribed by A.G. Doukas; M.R. Junnarkar; D. Chandra; R.R. Alfano; R.H. Callender
- Publisher
- Elsevier Science
- Year
- 1983
- Tongue
- English
- Weight
- 358 KB
- Volume
- 100
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
Rcccikcd 12 h1.1y 1953 The fluorescence rehxntion kinetics from all-tins retinal in polsr nnd non-polar solvents have been investigated as a function of tempcraturc. An activrltion cnegy of ==I kcal/mole has been measured. Our results, in conjunction with pwious picosecond absorption measurcmeuts made by Hochstracser et al.. stron& su_r_rcst that initially excited rnolecuies IO I'rdnrk-Condon s~dte\ rela.. to three singlet c.\cited states.
π SIMILAR VOLUMES
Picosecond time-resolved absorption spectra of all-tram-and 9-cis-retinal in n-hexane solution have been measured by using an Nd3+:YAG laser photolysis system. A drastic change of the T,+T, absorption spectrum of the 9-cis isomer has been observed in the picosecond to nanosecond time region, which s
The 13C spin-lattice relaxation times and nuclear Overhauser enhancement factors of all-trans-retinal were measured in acetone-d, at two different magnetic field strengths. The extent to which the chemical shift anisotropy mechanism was found to contribute to the relaxation rate of the quaternary ol
The shape and maxima of these spectra at 830 + 10 nm were the same in all three solvents. The energy of the S, (2 '4) state was found at 13200 + 300 cm-'. The fluorescence quantum yields of all-tram-g-carotene for the above-mentioned solvents are equal to (O.SkO.2) x 10Vs, (0.8kO.2) x lo-' and (2.O