A channel-structured Eu-based metal-organic framework with a zwitterionic ligand for selectively sensing Fe 3+ ions

A novel Eu-based MOF [Eu(IMS1) ]Cl·4H O (1) was successfully constructed based on a semi-rigid zwitterionic 1,3-bis(4-carboxylbenzyl)-imidazolium (IMS1) ligand, featuring a 3-fold interpenetrating dia net structure with a point symbol of 6 and charged permanent micropores. Considering its excellent...

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Published inRSC advances Vol. 8; no. 38; pp. 21444 - 21450
Main Authors Huang, Yong-Qing, Chen, Huai-Ying, Wang, Yang, Ren, Yong-He, Li, Zong-Ge, Li, Lu-Chao, Wang, Yan
Format Journal Article
LanguageEnglish
Published England 08.06.2018
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Summary:A novel Eu-based MOF [Eu(IMS1) ]Cl·4H O (1) was successfully constructed based on a semi-rigid zwitterionic 1,3-bis(4-carboxylbenzyl)-imidazolium (IMS1) ligand, featuring a 3-fold interpenetrating dia net structure with a point symbol of 6 and charged permanent micropores. Considering its excellent luminescent property as well as thermal and chemical stability, complex 1 was explored as a potential sensor for detecting Fe ions. The results show that complex 1 has a high sensitivity and selectivity for Fe based on a 'turn-off' effect, for which the electrostatic interaction between Fe ions and the inner surface of the micropores may play a critical role. The fluorescence quenching mechanism reveals that dynamic quenching and competitive adsorption between Fe and 1 lead to the quenching effect of 1.
ISSN:2046-2069
2046-2069
DOI:10.1039/C8RA02809E