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
BORG, DC
[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 1970, 67 (02) : 813 - &
[3] N-2 LASER PUMPED DYE-LASER PHOTOLYSIS
CASTELLI, F
[J]. CHEMICAL PHYSICS LETTERS, 1976, 38 (03) : 528 - 531
[4] CHIBISOV AK, 1972, DOKL AKAD NAUK SSSR+, V205, P142
[5] A FLASH PHOTOLYSIS STUDY OF INTERMEDIATES IN PHOTOCHEMICAL REACTIONS OF CHLOROPHYLL
CHIBISOV, AK
[J]. PHOTOCHEMISTRY AND PHOTOBIOLOGY, 1969, 10 (05) : 331 - &
[6] LASER FLASH-PHOTOLYSIS STUDIES OF CHLORIN AND PORPHYRIN SYSTEMS .1. ENERGETICS OF TRIPLET-STATE OF BACTERIOCHLOROPHYLL
CONNOLLY, JS
GORMAN, DS
SEELY, GR
[J]. ANNALS OF THE NEW YORK ACADEMY OF SCIENCES, 1973, 206 (OCT22) : 649 - 669
[7] OXIDATION OF CHLOROPHYLL ALPHA IN ALCOHOLS
DIEHN, B
SEELY, GR
[J]. BIOCHIMICA ET BIOPHYSICA ACTA, 1968, 153 (04) : 862 - &
[8] ELECTRON-TRANSFER FROM PHOTOEXCITED SINGLET AND TRIPLET BACTERIOPHEOPHYTIN .2. THEORETICAL
GOUTERMAN, M
HOLTEN, D
[J]. PHOTOCHEMISTRY AND PHOTOBIOLOGY, 1977, 25 (01) : 85 - 92
[9] REVERSIBLE PHOTOOXIDATION OF CHLOROPHYLL - STUDY OF CHLOROPHYLL-BENZOQUINONE SYSTEM UTILIZING FLASH-PHOTOLYSIS AND ELECTRON-SPIN RESONANCE SPECTROSCOPY
HALES, BJ
BOLTON, JR
[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1972, 94 (10) : 3314 - +
[10] CHLOROPHYLL ONE-ELECTRON PHOTOCHEMISTRY .2. PHOTOSENSITIZATION BY CHLOROPHYLL, PHEOPHYTIN AND BACTERIOCHLOROPHYLL OF A ONE-ELECTRON TRANSFER-REACTION BETWEEN ETHANOL AND QUINONE
HARBOUR, JR
TOLLIN, G
[J]. PHOTOCHEMISTRY AND PHOTOBIOLOGY, 1974, 19 (02) : 147 - 161

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