Abstract
The syntheses, thermodynamic and kinetic properties of a series of 2-styryl-1-benzopyrylium compounds are reported. This family of compounds was found to follow the same pH- and light-dependent network of chemical reactions previously described for flavylium (2-phenyl-1-benzopyrylim) compounds. However, 2-styryl-1-benzopyrylium compounds exhibit absorption spectra substantially red shifted when compared with flavylium analogues (up to 90 nm). In particular, a photochromic system switching from yellow to light blue based on derivatives of natural anthocyanins is for the first time documented. (C) 2008 Elsevier Ltd. All rights reserved.
Original language | English |
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Pages (from-to) | 69-79 |
Number of pages | 11 |
Journal | Dyes and Pigments |
Volume | 81 |
Issue number | 1 |
DOIs | |
Publication status | Published - Apr 2009 |