Synthesis and Spectrokinetic Studies of a New Family of Dimethyl [2H]-Chromenes: Dimethyl 6-Aryl-2,2Dimethyl-[2H]-Chromene-7,8-Dicarboxylates
作者:
Alain Maggiani,
Arlette Tubul,
Pierre Brun,
André Samat,
期刊:
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals
(Taylor Available online 2000)
卷期:
Volume 344,
issue 1
页码: 259-263
ISSN:1058-725X
年代: 2000
DOI:10.1080/10587250008023846
出版商: Taylor & Francis Group
关键词: propargylic ether;dimethyl 6-aryl-2;2-dimethyl-[2H]-chromene-7;8-dicarboxylates;photochromic compounds
数据来源: Taylor
摘要:
The synthesis of a series of dimethyl 6-aryl-2,2-dimethyl-[2H]-chromene-7,8-dicarboxylates is described. The photochromic properties of this new family of dimethyl-[2H]-chromenes have been studied in solution, under continuous irradiation. The presence of the methoxycarbonyl groups was shown to stabilise the coloured forms. The fading rates are generally low in comparison with the standard “naked” chromenes in the same experimental conditions. This stabilisation depends on the solvent used. We could observe the presence of one permanent opened form. Moreover, it seems that the synthesised molecules have a strong resistance toward photodegradation.
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