TIME-RESOLVED RESONANCE RAMAN-SPECTROSCOPIC INVESTIGATIONS OF THE PHOTOCHEMISTRY OF UBIQUINONE

被引:26
作者
PARKER, AW
HESTER, RE
PHILLIPS, D
UMAPATHY, S
机构
[1] UNIV YORK,DEPT CHEM,YORK YO1 5DD,N YORKSHIRE,ENGLAND
[2] UNIV LONDON IMPERIAL COLL SCI TECHNOL & MED,DEPT CHEM,LONDON SW7 2AY,ENGLAND
[3] INDIAN INST SCI,DEPT INORGAN & PHYS CHEM,BANGALORE 560012,KARNATAKA,INDIA
来源
JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS | 1992年 / 88卷 / 18期
关键词
D O I
10.1039/ft9928802649
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Time-resolved resonance Raman spectroscopy has been used to investigate the photochemistry of ubiquinone in cyclohexane, water and ethanol. In water the absorption of a single 248 nm photon produces triplet ubiquinone which then oxidises water, via electron transfer, to form the ubiquinone radical anion. In ethanol, however, the triplet state reacts with the solvent via both electron and hydrogen-atom transfer, the latter process forming the semihydroquinone. Only in the less reactive solvent, cyclohexane, is triplet quinone observed. The Raman bands observed for each of the species are assigned on the basis of similarities of their spectra to other quinones.
引用
收藏
页码:2649 / 2653
页数:5
相关论文
共 23 条
[1]   TRIPLET-STATES OF UBIQUINONE ANALOGS STUDIED BY ULTRAVIOLET AND ELECTRON NANOSECOND IRRADIATION [J].
AMOUYAL, E ;
BENSASSON, R ;
LAND, EJ .
PHOTOCHEMISTRY AND PHOTOBIOLOGY, 1974, 20 (05) :415-422
[2]   DUROQUINONE TRIPLET REDUCTION, IN CYCLOHEXANE, ETHANOL AND WATER, AND BY DUROHYDROQUINONE [J].
AMOUYAL, E ;
BENSASSON, R .
JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS I, 1976, 72 :1274-1287
[3]   TRANSIENT RAMAN-SCATTERING STUDY OF THE INITIAL SEMI-QUINONE RADICAL KINETICS FOLLOWING PHOTOLYSIS OF AQUEOUS BENZOQUINONE AND HYDROQUINONE [J].
BECK, SM ;
BRUS, LE .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1982, 104 (18) :4789-4792
[4]   PHOTO-OXIDATION OF WATER BY PARA-BENZOQUINONE [J].
BECK, SM ;
BRUS, LE .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1982, 104 (04) :1103-1104
[5]   NANOSECOND IRRADIATION STUDIES OF BIOLOGICAL MOLECULES .1. COENZYME-Q 6 (UBIQUINONE-30) [J].
BENSASSON, R ;
CHACHATY, C ;
SALET, C ;
LAND, EJ .
PHOTOCHEMISTRY AND PHOTOBIOLOGY, 1972, 16 (01) :27-+
[6]   STRUCTURES AND FUNDAMENTAL VIBRATIONS OF P-BENZOQUINONE AND P-BENZOSEMIQUINONE RADICAL-ANION FROM ABINITIO CALCULATIONS [J].
CHIPMAN, DM ;
PREBENDA, MF .
JOURNAL OF PHYSICAL CHEMISTRY, 1986, 90 (22) :5557-5560
[7]   RESONANCE RAMAN STUDIES OF THE PARA-BENZOSEMIQUINONE AND P,P'-BIPHENYLSEMIQUINONE FREE-RADICAL ANIONS [J].
HESTER, RE ;
WILLIAMS, KPJ .
JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS II, 1982, 78 :573-584
[8]  
INFANTE GA, 1982, RADIAT RES, V92, P307
[9]   PHOTOCHEMISTRY OF METHYLATED PARA BENZOQUINONES [J].
KEMP, DR ;
PORTER, FRS .
PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL AND PHYSICAL SCIENCES, 1971, 326 (1564) :117-&
[10]  
LAND EJ, 1970, J BIOL CHEM, V245, P1890