Photodegradation study of a [2H]-naphtho [1,2-b] pyran derivative in solution and in polymer matrix

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作者：

Lab. de Photochimie Organique Appl., Univ. Mediter. G.C.O.P.L. ESA 6114, 163 avenue de Luminy, case, 901-13288 MARSEILLE Cedex 9, France ^{[1
]}

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来源：

Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals | 2000年 / 345卷

关键词：

Gas chromatography - High performance liquid chromatography - Mass spectrometry - Molecular structure - Molecular weight - Photochromism - Photodegradation - Photooxidation - Polyurethanes - Solutions - Toluene;

D O I：

10.1080/10587250008023886

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学科分类号：

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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