Photodegradation Study of a [2H]-Naphtho [1,2-b] Pyran Derivative in Solution and in Polymer Matrix
作者:
R. Demadrille,
M. Campredon,
R. Guglielmetti,
G. Giusti,
期刊:
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals
(Taylor Available online 2000)
卷期:
Volume 345,
issue 1
页码: 1-8
ISSN:1058-725X
年代: 2000
DOI:10.1080/10587250008023886
出版商: Taylor & Francis Group
关键词: photochromism;photodegradation;photooxidation;polymer;chromene
数据来源: Taylor
摘要:
This paper deals with the investigation of the photodegradation of (2,2-(4,4′-dimethoxyphenyl)-5,6-dimethyl-[2H]-naphtho-[1,2-b]pyran in toluene solution and in polyurethane matrix. With the aim of proposing mechanisms for the photodegradation processes, a complete determination of the photoproducts' structures has been carried out using HPLC, GC/MS and direct introduction MS techniques. The different techniques allowed us to detect the production of well-known photoproducts but also the formation of new high molecular weight oxygenated derivatives. Our investigations also underline the detection of new photo-induced products that are produced by secondary oxidative pathway.
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