Phototransformation of 4-chloro-2-methylphenoxy acetic acid (MCPA)

被引：8

作者：

Zertal, A

Sehili, T

Boule, P ^{[1
]}

机构：

[1] Univ Blaise Pascal, CNRS, UMR 6505, Photochim Mol & Macromol Lab, F-63177 Clermont Ferrand, France

[2] Univ Constantine, Lab Photochim & Environm, Unite Rech Chim, Constantine 25000, Algeria

来源：

ZEITSCHRIFT FUR PHYSIKALISCHE CHEMIE-INTERNATIONAL JOURNAL OF RESEARCH IN PHYSICAL CHEMISTRY & CHEMICAL PHYSICS | 1999年 / 213卷

关键词：

phototransformation; photohydrolysis; MCPA; 4-chloro-2-methylphenoxyacetic acid; 4-hydroxy-2-methylphenoxyacetic acid;

D O I：

10.1524/zpch.1999.213.Part_1.087

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：

MCPA was irradiated in various conditions: in aqueous solution at different wavelengths, on silica in the absence of water, in the presence of TiO2, in aqueous suspension. In solution a wavelength effect was observed: the formation of 4-hydroxy-2-methylphenoxyacetic acid is the main pathway at wavelengths shorter than 300 nm, whereas 4-chloro-2-methylphenol is the main product resulting from sunlight irradiation. Direct photolysis on silica and photocatalytic transformation mainly lead to the formation of 4-chloro-2-methylphenol.

引用

页码：87 / 92

页数：6

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