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

Feng Zhang; Xiaoqin Zou; Wei Feng; Xiaojun Zhao; Xiaofei Jing; Fuxing Sun; Hao Ren; Guangshan Zhu

doi:10.1039/C2JM34618D

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

Feng Zhang,^a Xiaoqin Zou,^a Wei Feng,^b Xiaojun Zhao,^a Xiaofei Jing,^a Fuxing Sun,^a Hao Ren^a and Guangshan Zhu*^a^c

* Corresponding authors

^a State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun, China
E-mail: zhugs@jlu.edu.cn
Fax: +86 431-8516-8331

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

^c Queensland Micro and Nanotechnology Centre, Nathan campus, Griffith University, Australia

Abstract

An indium trimesate metal–organic framework (JUC-120) which possesses a cubic zeolitic MTN topology, as a new analogue to MIL-100(Al, Fe or Cr) compounds, has been successfully synthesized. Its structure exhibits a mesoporous cage (26 Å) 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.

Supplementary files

Publication details

The article was received on 14 Jul 2012, accepted on 21 Sep 2012 and first published on 21 Sep 2012

Article type: Paper

DOI: 10.1039/C2JM34618D

Citation: J. Mater. Chem., 2012,22, 25019-25026

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

F. Zhang, X. Zou, W. Feng, X. Zhao, X. Jing, F. Sun, H. Ren and G. Zhu, J. Mater. Chem., 2012, 22, 25019
DOI: 10.1039/C2JM34618D
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Journal of Materials Chemistry

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

Abstract

Supplementary files

Publication details

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

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