PHOTOCHEMISTRY OF ADSORBED MOLECULES .8. PHOTODISSOCIATION, PHOTOELIMINATION, AND PHOTOREACTION IN VINYL-CHLORIDE ON LIF(001)

被引：19

作者：

DIXONWARREN, SJ ^{[1
]}

MATYJASZCZYK, MS ^{[1
]}

POLANYI, JC ^{[1
]}

RIELEY, H ^{[1
]}

SHAPTER, JG ^{[1
]}

机构：

[1] UNIV TORONTO,DEPT CHEM,TORONTO M5S 1A1,ONTARIO,CANADA

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1991年 / 95卷 / 03期

关键词：

D O I：

10.1021/j100156a056

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：

Photochemical processes that occur in submonolayers of vinyl chloride adsorbed on a single crystal of LiF have been investigated. Four different photofragments, Cl, C2H3, HCl, and C2H2, as well as intact parent molecules, C2H3Cl, were monitored by means of angularly resolved time-of-flight mass spectrometry following irradiation at 193 nm. The translational energy distributions of the fragments differ markedly from those observed in the gas phase. Cl atoms were formed through two photodissociation (PDIS) pathways at all surface coverages studied (< 2 monolayers), while HCl was formed by a unimolecular photoelimination (PEL) process at low coverages (<< 1 monolayer) and, in addition, by photoreaction (PRXN) in the adsorbed layer to yield more energetic HCl, at higher coverages (approximately 1 monolayer).

引用

页码：1333 / 1338

页数：6

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