Radiationless deactivation of the second excited singlet state 1Σg+ of O2 in solution

被引：39

作者：

Schmidt, R ^{[1
]}

Bodesheim, M ^{[1
]}

机构：

[1] Univ Frankfurt, Inst Phys & Theoret Chem, D-60439 Frankfurt, Germany

来源：

JOURNAL OF PHYSICAL CHEMISTRY A | 1998年 / 102卷 / 25期

关键词：

D O I：

10.1021/jp981170p

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：

The deactivation of the upper excited singlet oxygen O-2((1)Sigma(g)(+)) by 22 different quenchers has been studied in the liquid phase by time-resolved emission experiments. Radiationless deactivation occurs by electronic to vibrational (e-v) energy transfer to terminal bonds X-Y of the quenching molecule. A model is presented which describes the broad variation of rate constants over 4 orders of magnitude. The quantitative comparison with the e-v deactivation of O-2((1)Delta(g)) demonstrates that for O-2((1)Sigma(g)(+)) in addition to the excitation of stretching modes the excitation of bending modes of X-Y becomes important for the overall deactivation process.

引用

页码：4769 / 4774

页数：6

共 38 条

[1] ISOTOPE-DEPENDENT QUENCHING OF SINGLET MOLECULAR-OXYGEN (1-DELTA-G) BY GROUND-STATE OXYGEN IN SEVERAL PERHALOGENATED SOLVENTS [J].

AFSHARI, E ;

SCHMIDT, R .

CHEMICAL PHYSICS LETTERS, 1991, 184 (1-3) :128-132

[2]

[Anonymous], 1970, PHOTOPHYSICS AROMATI

[3] ABSOLUTE INTENSITIES OF DISCRETE AND CONTINUOUS ABSORPTION BANDS OF OXYGEN GAS AT 1.26 AND 1.065 MU AND RADIATIVE LIFETIME OF 1LAMDAG STATE OF OXYGEN [J].

BADGER, RM ;

WRIGHT, AC ;

WHITLOCK, RF .

JOURNAL OF CHEMICAL PHYSICS, 1965, 43 (12) :4345-&

[4] LUMINESCENCE OF METASTABLE O-16(2)(O-18(2)) IN SOLID ARGON - RELAXATION AND ENERGY-TRANSFER [J].

BECKER, AC ;

SCHURATH, U ;

DUBOST, H ;

GALAUP, JP .

CHEMICAL PHYSICS, 1988, 125 (2-3) :321-336

[5] Chemical reactivity of sigma singlet oxygen O-2(1 Sigma(+)(g)) [J].

Bodesheim, M ;

Schmidt, R .

JOURNAL OF PHYSICAL CHEMISTRY A, 1997, 101 (31) :5672-5677

[6] DENSITY AND TEMPERATURE-DEPENDENCE OF THE RELAXATION OF THE 1-DELTA-G STATE OF HIGHLY COMPRESSED O-2 FLUID [J].

CHATELET, M ;

TARDIEU, A ;

SPREITZER, W ;

MAIER, M .

CHEMICAL PHYSICS, 1986, 102 (03) :387-394

[7] Direct spectroscopic evidence of photosensitized O-2 765 nm ((1)Sigma(+)(g)->(3)Sigma(-)(g)) and O-2 dimol 634 and 703 nm (((1)Delta(g))(2)->((3)Sigma(-)(g))(2)) vibronic emission in solution [J].

Chou, PT ;

Wei, GT ;

Lin, CH ;

Wei, CY ;

Chang, CH .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1996, 118 (12) :3031-3032

[8]

DICKENS PG, 1962, DISCUSS FARADAY SOC, P52

[9] RISE AND DECAY KINETICS OF PHOTOSENSITIZED SINGLET OXYGEN LUMINESCENCE IN WATER - MEASUREMENTS WITH NANOSECOND TIME-CORRELATED SINGLE PHOTON-COUNTING TECHNIQUE [J].

EGOROV, SY ;

KAMALOV, VF ;

KOROTEEV, NI ;

KRASNOVSKY, AA ;

TOLEUTAEV, BN ;

ZINUKOV, SV .

CHEMICAL PHYSICS LETTERS, 1989, 163 (4-5) :421-424

[10]

EGOROV SY, 1983, BIOFIZIKA+, V28, P497

← 1 2 3 4 →