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Cationic merocyanine dyes by photomodulation of [4-(naphthopyran-3-yl)phenyl]methines

Aiken, Stuart, Clayton, Danielle, Gabbutt, Christopher D., Heron, B. Mark and Kolla, Suresh B. (2013) Cationic merocyanine dyes by photomodulation of [4-(naphthopyran-3-yl)phenyl]methines. Dyes and Pigments, 97 (1). pp. 118-123. ISSN 0143-7208

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A series of mono-, bis- and tris-4-(naphthopyran-3-yl)phenyl substituted methanols were efficiently synthesised using a 4-(naphthopyran-3-yl)phenyllithium intermediate. The resulting substituted methanols displayed good photochromism leading to the reversible generation of redeorange photomerocyanines. Acidic dehydration of the methanols gave intensely coloured cations which, upon
subsequent UV irradiation, reversibly generated cationic photomerocyanines with long wavelength
absorption maxima at ca. 640 nm.

Item Type: Article
Subjects: Q Science > QD Chemistry
Schools: School of Applied Sciences
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Depositing User: Mark Heron
Date Deposited: 15 Jul 2013 09:05
Last Modified: 28 Aug 2021 11:30


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