Photo- and thermochromic cation sensitive spiro[indoline-pyridobenzopyrans]
Photo- and thermochromic cation sensitive spiro[indoline-pyridobenzopyrans]
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DOI：
10.1002/poc.1252
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发表时间：
2007-11-01
影响因子：
1.8
通讯作者：
Minkin, Vladimir I.
中科院分区：
文献类型：
--
作者：
Chernyshev, Anatoly V.;Metelitsa, Anatoly V.;Minkin, Vladimir I.
研究了一系列螺[吲哚啉吡啶苯并吡喃] 1-5的光致变色和热致变色行为。用紫外-可见吸收光谱和核磁共振氢谱测定了螺吡喃的闭环和开环异构体之间的热平衡热力学和动力学参数。1-（2-羟乙基）-螺[吲哚啉-吡啶并苯并吡喃] 4的最稳定形式是其反式-（羟基苯乙烯基）恶唑烷吲哚啉异构体与闭环螺形物共存于丙酮溶液中。在金属盐溶液中，螺[吲哚啉-吡啶并苯并吡喃]由于与汞配体形成络合物而表现出强的离子致色效应。由Zn ~（2+）和Ni ~（2+）离子形成的复合物的组成已确定与使用分光光度计和电喷雾电离质谱技术。测定了最稳定的1：1和1：2金属/汞配合物的逐级稳定常数和光谱性质。络合反应的选择性取决于热致变色平衡的位置。版权所有（c）2007约翰威利父子有限公司。
The photo- and thermochromic behaviour of a series of spiro[indolinepyridobenzopyrans] 1-5 has been studied. The thermodynamic and kinetic parameters of the thermal equilibria between the ring-closed and ring-opened (merocyanine) isomeric forms of spiropyrans have been determined using UV-Vis absorption and H-1 NMR spectroscopies techniques. The most stable form of 1-(2-hydroxyethyl)-spiro[indoline-pyridobenzopyran] 4 is represented by its trans-(hydroxystyryl)oxazolidineindoline isomer coexisting in acetone solution with the ring-closed spiroform. In the presence in solution of metal salts, spiro[indoline-pyridobenzopyrans] exhibit strong ionochromic effect due to the formation of complexes with the merocyanine ligand. The composition of the complexes formed by Zn2+ and Ni2+ ions has been determined with the use of spectrophotometric and electrospray ionisation mass spectroscopy techniques. The stepwise stability constants and spectral properties of the most stable 1:1 and 1:2 metal/ merocyanine complexes have been determined. Selectivity of the complexation reaction depends on the position of the thermochromic equilibrium. Copyright (c) 2007 John Wiley & Sons, Ltd.