The synthesis and reaction network of 2-styryl-1-benzopyrylium salts: An unexploited class of potential colorants

被引：31
|
作者：
Gomes, Raquel [1 ]
Diniz, Ana M. [1 ]
Jesus, Alexandre [1 ]
Parola, A. Jorge [1 ]
Pina, Fernando [1 ]
机构：
[1] Univ Nova Lisboa, Fac Ciencias & Tecnol, Dept Quim, REQUIMTE, P-2829516 Caparica, Portugal
来源：
DYES AND PIGMENTS | 2009年 / 81卷 / 01期
关键词：
Flavylium; 2-Phenyl-1-benzopyrylium; 2-Styryl-1-benzopyrylium; Food colorants; Photochromism; STRUCTURAL TRANSFORMATIONS; AQUEOUS-SOLUTIONS; FLAVYLIUM; PHOTOCHROMISM; HYDRATION; SYSTEMS; KETONES;
D O I：
10.1016/j.dyepig.2008.09.007
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
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.
引用
收藏
页码：69 / 79
页数：11
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