RADICAL INTERMEDIATES IN THE PHOTOCHEMICAL DECOMPOSITION OF P-TOLUENESULPHONATE (A KINETIC SPIN-TRAPPING STUDY)

被引：11
|
作者：
BREZOVA, V
STASKO, A
BISKUPIC, S
机构：
[1] Faculty of Chemical Technology, Slovak Technical University, 81237 Bratislava, Radlinského 9, CS
来源：
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 1993年 / 71卷 / 03期
关键词：
D O I：
10.1016/1010-6030(93)85004-R
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：
On irradiation of aqueous sodium p-toluenesulphonate solutions, the NaSO3. radical is formed, whose lifetime is approximately 5 x 10(-3) s, and which is characterized by a singlet electron paramagnetic resonance (EPR) spectrum with g = 2.0035. In the presence of 5,5-dimethyl-1-pyrroline-N-oxide (DMPO) the main product found is the NaSO3.-DMPO adduct with splitting constants a(N) = 1.45 mT and a(H) = 1.635 mT. Its formation and decay can be described by formal first-order kinetics and a corresponding reaction scheme is suggested. HO.-DMPO and carbon-centred R3C.-DMPO adducts are observed as minor byproducts.
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页码：229 / 235
页数：7
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