Premium
Synthesis and Spectrokinetic Studies of a New Family of Photochromic 2 H ‐Chromenes (=2 H ‐1‐Benzopyrans): Dimethyl 6‐Aryl‐2,2‐dimethyl‐2 H ‐chromene‐7,8‐dicarboxylates
Author(s) -
Maggiani Alain,
Tubul Arlette,
Brun Pierre
Publication year - 2000
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/(sici)1522-2675(20000315)83:3<650::aid-hlca650>3.0.co;2-u
Subject(s) - chemistry , photodegradation , irradiation , photochromism , mercury vapor lamp , solvent , photochemistry , mercury (programming language) , medicinal chemistry , organic chemistry , nuclear chemistry , polymer chemistry , catalysis , physics , photocatalysis , nuclear physics , optoelectronics , computer science , programming language
A series of dimethyl 6‐aryl‐2,2‐dimethyl‐2 H ‐chromene‐7,8‐dicarboxylates were synthesized, and the photochromic properties of this new family of dimethyl‐2 H ‐chromenes were studied under continuous irradiation. The presence of the methoxycarbonyl groups was shown to stabilize the colored forms. This stabilization depended on the solvent, and in two cases the formation of long‐lived opened forms was observed. Under irradiation with a mercury lamp, this family of 2 H ‐chromenes showed a strong resistance to photodegradation.