Metal–organic frameworks based on bipyridinium carboxylate: photochromism and selective vapochromism

Two new metal–organic frameworks based on a cationic 1-(3,5-dicarboxyphenyl)-4,4′-bipyridinium bromide (H 2 ipbpBr) ligand have been designed and synthesized by varying the solvents and counterions to adjust the coordination modes between organic linkers and metal ions. Both of them possess two dime...

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Bibliographic Details
Published in:Journal of materials chemistry. C, Materials for optical and electronic devices Materials for optical and electronic devices, 2017, Vol.5 (8), p.2084-2089
Main Authors: Zhang, Chenghui, Sun, Libo, Yan, Yan, Liu, Yuchuan, Liang, Zhiqiang, Liu, Yunling, Li, Jiyang
Format: Article
Language:English
Subjects:
Cationic
Colorimetry
Materials selection
Metal ions
Metal-organic frameworks
Sensors
Synthesis (chemistry)
Transformations
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Summary:Two new metal–organic frameworks based on a cationic 1-(3,5-dicarboxyphenyl)-4,4′-bipyridinium bromide (H 2 ipbpBr) ligand have been designed and synthesized by varying the solvents and counterions to adjust the coordination modes between organic linkers and metal ions. Both of them possess two dimensional (2D) neutral layered frameworks, which show photochromic and photo-modulated luminescence properties. Compound 1 is photo-active in response to UV light, while 2 is sensitive to visible and UV light, accompanied by color transformation from light yellow to brown and green, respectively. Furthermore, compound 1 exhibits interesting selective vapochromism to diethylamine (DEA), and the vapochromic sample can be easily recovered when washed with MeOH, which offers a simple, convenient and recyclable vapor sensor for organic gas emissions. This work provides abundant scope to explore novel MOF materials with useful photo-active and colorimetric sensor properties.
ISSN:2050-7526
2050-7534
DOI:10.1039/C6TC04724F