Conversion of SO2 to SO3 by in situ photolysis of SO2 and O3 mixtures isolated in argon matrixes:: Isotopic effects

被引：24

作者：

Chaabouni, H ^{[1
]}

Schriver-Mazzuoli, L ^{[1
]}

Schriver, A ^{[1
]}

机构：

[1] Univ Paris 06, Unite Propre CNRS, Lab Associe, Lab Phys Mol & Applicat, F-75252 Paris 05, France

来源：

JOURNAL OF PHYSICAL CHEMISTRY A | 2000年 / 104卷 / 16期

关键词：

D O I：

10.1021/jp993164e

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 mechanism of photooxidation of sulfur dioxide in the presence of ozone and under irradiation at 266 nm has been investigated at low temperature in an argon matrix. Formation of stable SO3 occurs from the reaction between SO2 and O(D-1) and also by oxygen atom transfer within the SO2:O-3 complex. Use of isotopic SO2 species led to unusual observations suggesting that photooxidation of SO2 proceeds via an intermediate species, namely, OSOO; this trioxide sulfur isomer transforms into SO3 by tunneling. In the gas phase, the quenching of the O(D-1) atom by SO2 could occur through this intermediate.

引用

页码：3498 / 3507

页数：10

共 38 条

[1]

ANDREWS L, 1989, CHEM PHYSICS MATRIX, P42

[2] Photolysis at 266 nm of argon matrix isolated ozone monomer [J].