Photochromic Behaviors of N-Isopropylacrylamide Copolymers Containing Azopyridine-Dyes
Photochromic Behaviors of N-Isopropylacrylamide Copolymers Containing Azopyridine-Dyes
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DOI：
10.1295/koron.68.195
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发表时间：
2011
影响因子：
--
通讯作者：
T. Michinobu;Rinako Eto;K. Shigehara
中科院分区：
文献类型：
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作者：
T. Michinobu;Rinako Eto;K. Shigehara
通过自由基聚合使含偶氮吡啶的甲基丙烯酸酯单体与N -异丙基丙烯酰胺共聚。当N -异丙基丙烯酰胺含量大于0.99时，共聚物表现出溶剂依赖的光致变色行为。在四氢呋喃溶液中，偶氮吡啶的反-顺式光异构化反应在紫外光照射下顺利进行，而共聚物在水中的紫外/维斯吸收光谱变化很小。光异构化效率的降低可能是由于聚合物基质中反式偶氮吡啶部分的固定化，
12 1 Ookayama, Meguro-ku, Tokyo 152 8550, Japan ) Azopyridine-containing methacrylate monomer was copolymerized with N -isopropylacrylamide by radical polymerization. The copolymer with N -isopropylacrylamide content of ＞ 0.99 showed a solvent-dependent photochromic behavior. In a THF solution, the trans-cis photoisomerization of the azopyridine moieties smoothly proceeded by a UV light irradiation, while the copolymer displayed a negligible change in the UV / Vis absorption spectra in water. The decrease in the photoisomerization efficiency was probably due to the im-mobilization of the trans -azopyridine moieties in the polymer matrices because