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Photochromism of 1-methyl-2,4,4,6-tetraphenyl-1,4-dihydropyridine in the solid state: an example of a dispersive chemical reaction

✍ Scribed by S. Nešpůrek; W. Schnabel

Publisher
Elsevier Science
Year
1991
Tongue
English
Weight
614 KB
Volume
62
Category
Article
ISSN
1010-6030

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✦ Synopsis

The photochromic behaviour of l-methyl-2,4,4,6-tetraphenyl-1,4-dihydropyridine (DHP) in the solid state is described. The time dependence of the colour decay process is analysed in terms of a dispersive first-order chemical reaction. The non-exponential dependence can be accounted for by a Gaussian distribution of activation energies whose width decreases with increasing temperature. A similar dispersive bleaching reaction with DHP was observed in solid polymer solutions.

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