Dependence of Photochemical Reactivity of the All-trans Retinal Protonated Schiff Base on the Solvent and the Excitation Wavelength (CROSBI ID 261932)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Zgrablić, Goran ; Ricci, Maria ; Novello, Anna Maria ; Parmigiani, Fulvio
engleski
Dependence of Photochemical Reactivity of the All-trans Retinal Protonated Schiff Base on the Solvent and the Excitation Wavelength
An all-optical experimental technique aimed at measuring photoisomerization quantum yield (φ) of the all-trans protonated Schiff base of retinal in solution has been implemented. Upon the increase in the excitation wavelength from 400 to 540 nm a slight increase in φ from 0.16 ± 0.03 to 0.20 ± 0.02 is observed in the chromophore dissolved in methanol, whereas the φ value of the one dissolved in acetonitrile varies only from 0.22 ± 0.03 (400 nm) to 0.23 ± 0.04 (540 nm). The results suggest that dissipation of the excited-state vibrational energy excess, along with environment-induced modifications of the potential energy surfaces are necessary for an efficient retinal photoisomerization in both solvent and protein environment.
retinal ; solvent effects ; photoisomerization
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Podaci o izdanju
86 (3)
2010.
507-512
objavljeno
0031-8655
10.1111/j.1751-1097.2009.00697.x