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Novel Photo- and Hydrochromic Europium Metal–Organic Framework with Highly Sensing Property for Anions

Abstract

Crystalline chromic materials coupled with other functionalities are of particular interest for their multiple external stimuli responsive properties. In this work, a new photochromic and hydrochromic metal-organic framework based on bipyridinium carboxylate cationic 1-(3,5-dicarboxyphenyl)-4,4'-bipyridinium bromide (H2ipbpBr) ligand and luminescent Eu3+ ion has been successfully designed and synthesized. [Eu(ipbp)2(H2O)3]·Br·6H2O (1) is photo-active both to UV and visible light accompanied with an obvious color change from light yellow to green owing to the formation of ipbp radicals under light stimulus. Meanwhile, compound 1 exhibits unique hydrochromic property, and the reversible color change between light yellow and dark green caused by electron transfer can be induced by guest water molecules release/reabsorption accompanied with the structure transformation. Moreover, the luminescent property and two-dimensional layered cationic network of 1 endows it excellent sensing ability for Cr2O72- and CrO42- anions. This work will provide new perspective to design smart MOF materials served as practical multi-responsive sensors for light, water, and chemicals.

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Publication details

The article was received on 06 Jul 2017, accepted on 08 Aug 2017 and first published on 08 Aug 2017


Article type: Paper
DOI: 10.1039/C7TC03013D
Citation: J. Mater. Chem. C, 2017, Accepted Manuscript
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    Novel Photo- and Hydrochromic Europium Metal–Organic Framework with Highly Sensing Property for Anions

    C. Zhang, L. Sun, Y. Yan, H. Shi, B. Wang, Z. Liang and J. Li, J. Mater. Chem. C, 2017, Accepted Manuscript , DOI: 10.1039/C7TC03013D

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