LASER PHOTOLYSIS STUDIES OF QUINONE REDUCTION BY CHLOROPHYLL-ALPHA IN ALCOHOL SOLUTION

被引：51

作者：

TOLLIN, G

CASTELLI, F

CHEDDAR, G

RIZZUTO, F

机构：

[1] Department of Chemistry, University of Arizona, Tucson, Arizona

来源：

PHOTOCHEMISTRY AND PHOTOBIOLOGY | 1979年 / 29卷 / 01期

关键词：

D O I：

10.1111/j.1751-1097.1979.tb09273.x

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

Upon laser photolysis of chlorophyll‐quinone solutions in ethanol, transients due to the chlorophyll triplet state (Ct), the chlorophyll cation radical (C+) and the semiquinone radical (Q‐) can be observed. The rise of Q‐ parallels the decay of Ct. demonstrating the precursor role of the triplet. The decay of C+ is second order, consistent with reverse electron transfer, and has a rate constant which is independent of quinone potential, and an activation energy of 14kJ/mol due mainly to the temperature dependence of solvent viscosity. Triplet quenching and C+ yield are found to decrease with decreasing quinone potential. Copyright © 1979, Wiley Blackwell. All rights reserved

引用

页码：147 / 152

页数：6

共 28 条

[1]

ANDREEVA NE, 1976, BIOFIZIKA+, V21, P29

[2] PI-CATION RADICAL OF CHLOROPHYLL-ALPHA [J].