Dyes and Pigments

Photochromism in spiroindolinonaphthoxazine dyes: Effects of alkyl and ester substituents on photochromic properties

SM Partington, AD Towns

Index: Partington, Steven M.; Towns, Andrew D. Dyes and Pigments, 2014 , vol. 104, p. 123 - 130

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Citation Number: 7

Abstract

Abstract The impact of substituents on the photochromism of some spirooxazines has been explored. A series of photochromic spiroindolino [2, 1-b][1, 4] naphthoxazine dyes was prepared with varying alkyl substitution patterns in the 3-to 6-positions of the indoline system. It was found that placing methyl functions onto the phenyl ring produced bathochromic shifts in λ max of the photomerocyanine as expected, but contrary to ...