IS SINGLET OXYGEN FORMATION DOMINANT IN TRIPLET QUENCHING PROCESSES - MEASUREMENT OF THE QUANTUM YIELD OF SINGLET OXYGEN FORMATION BY THE TIME-RESOLVED THERMAL LENS METHOD

被引：20

作者：

TERAZIMA, M ^{[1
]}

TONOOKA, M ^{[1
]}

AZUMI, T ^{[1
]}

机构：

[1] TOHOKU UNIV,FAC SCI,DEPT CHEM,SENDAI,MIYAGI 980,JAPAN

来源：

PHOTOCHEMISTRY AND PHOTOBIOLOGY | 1991年 / 54卷 / 01期

关键词：

D O I：

10.1111/j.1751-1097.1991.tb01985.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：

The quantum yields of singlet oxygen formation (PHI-DELTA) by the quenching of triplet states of organic sensitizers are measured at various concentrations of the sensitizers by using the time-resolved thermal lens method. Above a certain concentration, PHI-DELTA is independent of the sensitizer concentration. Below the threshold, PHI-DELTA gradually decreases as the concentration of the sensitizer decreases. The extrapolation of PHI-DELTA to zero concentration indicates that singlet oxygen formation is not necessarily dominant in the quenching process even for the 3-pi-pi* state in benzene.

引用

页码：59 / 66

页数：8

共 36 条

[1] FORMATION OF O2SIGMA+-1(G) BY 1-FLUORONAPHTHALENE SENSITIZATION [J].

ANDREWS, LJ ;

ABRAHAMSON, EW .

CHEMICAL PHYSICS LETTERS, 1971, 10 (02) :113-+

[2]

Birks J. B., 1973, WILEY MONOGRAPHS CHE, V1

[3]

BIRKS JB, 1975, ORGANIC MOLECULAR PH, V2, P409

[4]

CHATTOPADHYAY SK, 1985, J PHOTOCHEM, V30, P81, DOI 10.1016/0047-2670(85)87007-6

[5] LASER FLASH PHOTOLYTIC DETERMINATION OF TRIPLET YIELDS VIA SINGLET OXYGEN GENERATION [J].

CHATTOPADHYAY, SK ;

KUMAR, CV ;

DAS, PK .

JOURNAL OF PHOTOCHEMISTRY, 1984, 24 (01) :1-9

[6] SOLVENT EFFECT ON O-1-2 YIELD AND THE MECHANISM OF POLYCYCLIC-HYDROCARBON TRIPLET-STATE QUENCHING BY OXYGEN [J].

DARMANYAN, AP .

CHEMICAL PHYSICS LETTERS, 1983, 96 (03) :383-389

[7] THERMAL LENSING STUDY OF SINGLET OXYGEN REACTIONS [J].

FUKE, K ;

UEDA, M ;

ITOH, M .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1983, 105 (05) :1091-1096

[8] QUENCHING OF TRIPLET-STATES BY MOLECULAR-OXYGEN AND ROLE OF CHARGE-TRANSFER INTERACTIONS [J].

GARNER, A ;

WILKINSON, F .

CHEMICAL PHYSICS LETTERS, 1977, 45 (03) :432-435

[9] OXYGEN QUENCHING OF AROMATIC TRIPLET-STATES IN SOLUTION .2. [J].

GIJZEMAN, OL ;

KAUFMAN, F .

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS II, 1973, 69 (05) :721-726

[10]

GIJZEMAN OL, 1973, J CHEM SOC FARAD T 2, V69, P708, DOI 10.1039/f29736900708

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