TRANS-CIS-ISOMERIZATION OF CROWN ETHER-SUBSTITUTED AZOBENZENE AMPHIPHILES IN LANGMUIR-BLODGETT MEMBRANES

被引：3
|
作者：
ANZAI, J [1 ]
SAKASEGAWA, S [1 ]
TAKEMURA, T [1 ]
OSA, T [1 ]
机构：
[1] TOHOKU UNIV, INST PHARMACEUT, SENDAI 98077, JAPAN
来源：
MATERIALS SCIENCE & ENGINEERING C-BIOMIMETIC AND SUPRAMOLECULAR SYSTEMS | 1994年 / 2卷 / 1-2期
关键词：
LANGMUIR-BLODGETT MEMBRANES; TRANS-CIS-ISOMERIZATION; AZOBENZENE; CROWN ETHER AMPHIPHILES;
D O I：
10.1016/0928-4931(94)90038-8
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The photochemical and thermal isomerization of crown ether-substituted azobenzene amphiphiles were studied in Langmuir-Blodgett (LB) membrane and in solution. The photoisomerization of the azobenzene amphiphiles from trans to cis form tended to be suppressed in LB membrane as compared with those in solution. The cis-trans ratio at the photostationary state under UV light irradiation depended strongly on the chemical structure of the amphiphiles. The trans-cis isomerization was not fully reversible in the LB membranes because the azobenzene amphiphiles are highly densely packed. However, the isomerization reaction was fully reversible in the case of relatively loosely-packed LB membranes. In both membranes, the thermal isomerization from cis to trans form followed first-order kinetics.
引用
收藏
页码：107 / 112
页数：6
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