Photoregulation of molecular orientation of stearic acid in a polyion complex LB film containing azobenzene derivative
Photoregulation of molecular orientation of stearic acid in a polyion complex LB film containing azobenzene derivative
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DOI：
10.1021/jp990485h
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发表时间：
1999-07-01
影响因子：
3.3
通讯作者：
Kawai, T
中科院分区：
文献类型：
--
作者：
Kawai, T
合成了硬脂酸-d（35）（St-d（35））和4-辛基-4 '-（5-羧基五亚甲基氧基）偶氮苯（8A 5）与聚烯丙基胺的聚离子配合物，用红外反射吸收（RA）研究了8A 5在LB膜中的顺反光异构化对St-d（35）取向的调控。RA光谱显示，在45-65 ℃的温度范围内用UV光照射导致St-d（35）中的取向变化，通过8A 5从反式异构化为顺式异构化，并且用可见光照射使8A 5和St-d（35）返回到初始状态。然而，低于35 ℃和高于75 ℃，St-d（35）取向的光调节性能显著降低。
Polyion complex of stearic acid-d(35) (St-d(35)) and 4-octyl-4'-(5-carboxypentamethyleneoxy)azobenzene (8A5) with polyallylamine has been prepared, and orientational regulation of St-d(35) by trans-cis photoisomerization of 8A5 in the Langmuir-Blodgett films has been studied by means of infrared reflection absorption (RA) spectroscopy. The RA spectra revealed that irradiation with UV light in the temperature range 45-65 degrees C leads to an orientation change in St-d(35) by 8A5 isomerization from the trans form to the cis form, and that irradiation with visible light returns 8A5 and St-d(35) to the initial states. However, below 35 degrees C and above 75 degrees C, the performance of the photoregulation of St-d(35)'s orientation considerably decreased.