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.
ISI Document Delivery No.: 386VVTimes Cited: 11
Cited Reference Count: 28
Gomes, Raquel Diniz, Ana M. Jesus, Alexandre Parola, A. Jorge Pina, Fernando
Pina, Fernando/C-8161-2011; Parola, A. Jorge/F-4048-2010; Diniz, Ana /C-6705-2013; Caparica, cqfb_staff/H-2611-2013; REQUIMTE, AL/H-9106-2013; Chaves, Pedro/K-1288-2013
Parola, A. Jorge/0000-0002-1333-9076;
FCT-MCTES (Portugal) through FEDER; FOCI [POCI/QUI/57735/2004]; [SFRH/BD/27282/2006]
FCT-MCTES (Portugal) through FEDER and FOCI 2010 is acknowledged for financial support under project POCI/QUI/57735/2004 and PhD grant SFRH/BD/27282/2006 (RG).
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Oxford