Microwave-assisted crystallization inclusion of spiropyran molecules in indium trimesate films with antidromic reversible photochromism

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NSTL
Royal Soc Chemistry

外文摘要：An indium trimesate metal-organic framework (JUC-120) which possesses a cubic zeolitic MTN topology, as a new analogue to MIL-100(A1, Fe or Cr) compounds, has been successfully synthesized. Its structure exhibits a mesoporous cage (26 A) and high thermal stability. The assembly of nitrobenzospiropyran derivatives (BSP) into JUC-120 nanocrystals (BSP/JUC-120) is achieved by a microwave-assisted crystallization inclusion approach. The BSP/JUC-120 films have been prepared on quartz wafers by a spin-coating method. The successful encapsulation of BSP molecules into the mesopores of the JUC-120 structure has been verified by N2 adsorption and TGA measurements. The photochromic properties of BSP/JUC-120 films are studied by the UV-Vis and fluorescence spectroscopies. More interestingly, metastable open merocyanine (OMC) species are directly generated from the closed spiropyran form (CSP) without photoirradiation and stabilized for a long period in the BSP/JUC-120 film. The open merocyanine isomer bleaches to the closed spiropyran form by ultraviolet or visible light, and the coloration is regained upon standing in the dark, exhibiting antidromic photochromism. Moreover, the BSP/JUC-120 film shows high reversibility and thermal stability of photochromism. This highly efficient MOF film is expected to be promising in the applications of optical devices.

作者：

Xiaoqin Zou、Wei Feng、Feng Zhang

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作者单位：

State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun, China.

Key Lai? of Groundwater Resources and Environment, Ministry of Education, Jilin University, Jiefang Road 2519, Changchun 130021, People's Republic of China

出版年：

2012

DOI：

10.1039/c2jm34618d

Journal of Materials Chemistry

SCI

ISSN：0959-9428

年,卷(期)：2012.22(48)

参考文献量70