ZERO-FIELD SPLITTING OF THE 1ST EXCITED TRIPLET-STATE IN BIRADICALS ESTIMATED FROM MAGNETIC EFFECTS ON THE FLUORESCENCE DECAYS

被引：8

作者：

LEJEUNE, V ^{[1
]}

DESPRES, A ^{[1
]}

MIGIRDICYAN, E ^{[1
]}

机构：

[1] UNIV PARIS 11,CNRS,PHOTOPHYS MOLEC LAB,BATIMENT 213,F-91405 ORSAY,FRANCE

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1990年 / 94卷 / 26期

关键词：

D O I：

10.1021/j100389a002

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 fluorescence decay of matrix-isolated m-xylylene biradicals is nonexponential and attributed to the emission from different sublevels of the first excited triplet state. In the presence of a magnetic field, the lifetime of the slow decay component decreases. Its dependence as a function of a weak magnetic field can be calculated for different values of the zero-field splitting parameter D. The best fitting value is /D/ = 0.04 +/- 0.01 cm-1. This D value is found to be significantly larger in the first excited triplet state than in the ground state of the m-xylylene biradicals.

引用

页码：8861 / 8863

页数：3

共 14 条

[1] ELECTRON PARAMGNETIC RESONANCE SPECTRA OF GROUND-STATE TRIPLET DIPHENYLMETHYLENE AND FLUORENYLIDENE MOLECULES IN SINGLE CRYSTALS [J].

BRANDON, RW ;

CLOSS, GL ;

DAVOUST, CE ;

HUTCHISO.CA ;

KOHLER, BE ;

SILBEY, R .

JOURNAL OF CHEMICAL PHYSICS, 1965, 43 (06) :2006-&

[2] TRIPLET TRIPLET FLUORESCENCE AND SPIN POLARIZATION - META-XYLYLENE TYPE BIRADICALS [J].

DESPRES, A ;

LEJEUNE, V ;

MIGIRDICYAN, E ;

SIEBRAND, W .

JOURNAL OF PHYSICAL CHEMISTRY, 1988, 92 (24) :6914-6919

[3] RELAXATION MECHANISMS OF ZEEMAN SUBLEVELS OF PHOSPHORESCENT TRIPLET STATE OF PYRAZINE AT 1.6K [J].

HALL, L ;

OWENS, D ;

ELSAYED, MA .

MOLECULAR PHYSICS, 1971, 20 (06) :1025-&

[4] PARAMAGNETIC RESONANCE ABSORPTION IN NAPHTHALENE IN ITS PHOSPHORESCENT STATE [J].

HUTCHISON, C ;

MANGUM, BW .

JOURNAL OF CHEMICAL PHYSICS, 1961, 34 (03) :908-&

[5] METHYL SUBSTITUTION EFFECTS ON THE ELECTRONIC-STRUCTURES AND SPECTRA OF META-XYLYLENE BIRADICALS [J].

LEJEUNE, V ;

DESPRES, A ;

MIGIRDICYAN, E ;

BAUDET, J ;

BERTHIER, G .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1986, 108 (08) :1853-1860

[6] DECAY KINETICS OF A TRIPLET TRIPLET FLUORESCENCE SYSTEM - THE MESITYLYLENE BIRADICAL [J].

LEJEUNE, V ;

DESPRES, A ;

FOURMANN, B ;

DAZY, OB ;

MIGIRDICYAN, E .

JOURNAL OF PHYSICAL CHEMISTRY, 1987, 91 (27) :6620-6624

[7]

LEJEUNE V, IN PRESS

[8] EPR OF DIPHENYLMETHYLENE, A GROUND-STATE TRIPLET [J].

MURRAY, RW ;

WASSERMAN, E ;

YAGER, WA ;

TROZZOLO, AM .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1962, 84 (16) :3213-&

[9] INTERSYSTEM CROSSING INTO A SUPERPOSITION OF SPIN STATES - SYSTEM TETRAMETHYLPYRAZINE IN DURENE [J].

SCHADEE, RA ;

SCHMIDT, J ;

VANDERWAALS, JH .

CHEMICAL PHYSICS LETTERS, 1976, 41 (03) :435-439

[10] Optical detection of zero-field transitions in phosphorescent triplet states [J].

Schmidt, J. ;

Van Der Waals, J. H. .

CHEMICAL PHYSICS LETTERS, 1968, 2 (08) :640-642

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