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Photochromic Properties of a Spirooxazine and a Spiropyran in Alcoholic Solutions of Zirconium and Aluminium Alkoxides: Influence of the Ethyl Acetoacetate Chelating Agent on the Optical Properties
Author(s) -
Lafuma Aurélie,
ChodorowskiKimmes Sandrine,
Quinn Francis X.,
Sanchez Clément
Publication year - 2003
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200390045
Subject(s) - photochromism , chemistry , spiropyran , aluminium , ethyl acetoacetate , chelation , alkoxide , zirconium , denticity , inorganic chemistry , metal , photochemistry , polymer chemistry , organic chemistry , catalysis
The photochromism of two spiro compounds, a spiropyran and a spirooxazine, dissolved in alcoholic solutions of metal alkoxides M(OR) n (M = Zr, Al) has been studied. In the case of the aluminium alkoxide Al(O s Bu) 3 , special photochromic behaviour is observed characteristic of complexation between the coloured form of the dyes and the aluminium. This chemical interaction induces a considerable shift in the absorption spectra and a significant retardation rate in the dark. Addition of ethyl acetoacetate, a bidentate chelate of aluminium, leads to the disappearance of this particular photochromic behaviour. (© Wiley‐VCH Verlag GmbH & Co KGaA, 69451 Weinheim, Germany, 2003)