Preparation and Photochromic Properties of Powder and Films of DNA–Dodecyltrimethylammonium Ion Complex Containing Spiropyran Derivatives
Preparation and Photochromic Properties of Powder and Films of DNA–Dodecyltrimethylammonium Ion Complex Containing Spiropyran Derivatives
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DOI：
10.1246/bcsj.76.2423
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发表时间：
2003-12
影响因子：
4
通讯作者：
M. Saitō;K. Musha;Y. Yokoyama;Y. Yokoyama
中科院分区：
文献类型：
--
作者：
M. Saitō;K. Musha;Y. Yokoyama;Y. Yokoyama
将两种热可逆光致变色螺吡喃，1',3',3'-三甲基-6-硝基螺[2H-1-苯并吡喃-2,2'-二氢吲哚] 1 和 3',3'-二甲基-6-硝基-1-(3-磺基丙基)螺[2H-1-苯并吡喃-2,2'-二氢吲哚]三乙胺盐 2，掺入粉末和薄膜中有机溶剂可溶的 DNA-十二烷基三甲基铵离子复合物。粉末和薄膜表现出热可逆光致变色现象。粉末中的螺吡喃被认为嵌入到 DNA 碱基对中，因为：1）它们被彻底清洗以去除弱附着的分子，2）粉末的颜色与封闭或开放形式的螺吡喃不同，而掺杂在薄膜中的螺吡喃表现得与极性有机溶剂中一样，因此薄膜是螺吡喃和 DNA-十二烷基三甲基铵离子复合物的混合物。
Two thermally reversible photochromic spiropyrans, 1′,3′,3′-trimethyl-6-nitrospiro[2H-1-benzopyran-2,2′-indoline] 1 and 3′,3′-dimethyl-6-nitro-1-(3-sulfopropyl)spiro[2H-1-benzopyran-2,2′-indoline] triethylamine salt 2, were incorporated in powder and films of an organic-solvent-soluble DNA–dodecyltrimethylammonium ion complex. The powder and the films showed thermally reversible photochromism. The spiropyrans in the powder were considered to be intercalated into the DNA base pairs because: 1) they were thoroughly washed to remove weakly attaching molecules and 2) the color of the powder was different from either of the closed or open forms of the spiropyran, whereas spiropyrans doped in the films behaved as in the polar organic solvents, so that the film was a mixture of spiropyran and the DNA–dodecyltrimethylammonium ion complex.