Article ID Journal Published Year Pages File Type
177667 Dyes and Pigments 2009 6 Pages PDF
Abstract

The synthesis, NMR and mass spectrometric characterisation of a several novel compounds of the naphthopyran family containing either halogen or phosphonate substituents are reported. All of the compounds exhibited photochromic properties in solution and their thermal bleaching after exposure to polychromatic light was monitored using UV–vis spectrophotometry. The bleaching of the merocyanines from these compounds involved two first-order processes, the first of these being more relevant than the second. The effects of substituents upon bleaching kinetics are discussed.

Related Topics
Physical Sciences and Engineering Chemical Engineering Chemical Engineering (General)
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