Details

Autor(en) / Beteiligte

• Huang, Yong-Qing
• Chen, Huai-Ying
• Wang, Yang
• Ren, Yong-He
• Li, Zong-Ge
• Li, Lu-Chao
• Wang, Yan

Titel

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

Ist Teil von

• RSC advances, 2018-06, Vol.8 (38), p.21444-2145

Erscheinungsjahr

2018

Quelle

Electronic Journals Library

Beschreibungen/Notizen

• A novel Eu-based MOF [Eu(IMS1) 2 ]Cl·4H 2 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 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 3+ ions. The results show that complex 1 has a high sensitivity and selectivity for Fe 3+ based on a 'turn-off' effect, for which the electrostatic interaction between Fe 3+ 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 3+ and 1 lead to the quenching effect of 1 . A channel-structured Eu-based metal-organic framework with a zwitterionic ligand may serve as a sensor for selectively detecting Fe 3+ ions.