Photoinduced switching of nanocomposites consisting of azobenzene and molecular sieves: investigation of the switching states
Photoinduced switching of nanocomposites consisting of azobenzene and molecular sieves: investigation of the switching states
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DOI：
10.1016/s1387-1811(00)00277-8
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发表时间：
2000-12-01
影响因子：
5.2
通讯作者：
Marlow, F
中科院分区：
文献类型：
--
作者：
Hoffmann, K;Resch-Genger, U;Marlow, F
偶氮苯在AlPO_（4 -5）和ZSM-5分子筛基质中的顺反光异构化导致复合体系的折射率发生大的可逆变化。该过程强烈地依赖于照射波长和分子筛主体两者。顺式复合材料的热弛豫速率常数从AlPO 4 -5中的2.0 × 10（-6）s（-1）增加到ZSM-5中的3.1 × 10（-5）s（-1）。这两种切换状态在数小时或数天内都是稳定的。开关过程的可逆性超过几百个开关循环，表明顺-反光异构化在两种基质中都没有显著的副反应。(C)2000 Elsevier Science B. V.保留所有权利。
Cis-trans photoisomerization of azobenzene in the molecular sieve hosts AlPO4-5 and ZSM-5 causes large and reversible changes of the refractive index of the composite systems. This process strongly depends on both the irradiation wavelength and the molecular sieve host. The rate constant of the thermal relaxation of the cis-state composites increases from 2.0 x 10(-6) s(-1) in AlPO4-5 to 3.1 x 10(-5) s(-1) in ZSM-5. Both switching states are stable over hours or days. The reversibility of the switching process exceeds several hundred switching cycles indicating that the cis-trans photoisomerization proceeds without significant side reactions in both matrices. (C) 2000 Elsevier Science B.V. All rights reserved.