Preparative Organic Chemistry
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ChemInform Abstract: Photochromism of Spiropyrans in Aluminosilicate Gels.
First published: September 11, 1990
Abstract
The photochromism of spiropyrans (I) is studied by transient absorption and luminescence spectroscopy.
ChemInform Abstract
The photochromism of spiropyrans (I) is studied by transient absorption and luminescence spectroscopy. Stable, solid photochromic gels are prepared by dissolving 2 mg of (I) in anhydrous iPrOH and adding (Bu-O)2Al-O-Si(O-Et)3 (called ASE), then iPrOH/H2O (2:1); after that the sol is allowed to gel and polymerize for 3-6 days, thus forming inorganic clusters. The photochromic behavior of (I) is found to be different from that in silicate glasses.
