A channel-structured Eu-based metal-organic framework with a zwitterionic ligand for selectively sensing Fe3+ ions

被引：27
|
作者：
Huang, Yong-Qing [1 ,2 ]
Chen, Huai-Ying [1 ,2 ]
Wang, Yang [1 ,2 ]
Ren, Yong-He [1 ,2 ]
Li, Zong-Ge [1 ,2 ]
Li, Lu-Chao [1 ,2 ]
Wang, Yan [3 ]
机构：
[1] Shandong Univ Sci & Technol, State Key Lab Min Disaster Prevent & Control Cofo, Coll Chem & Environm Engn, Qingdao 266590, Peoples R China
[2] Shandong Univ Sci & Technol, Minist Sci & Technol, Coll Chem & Environm Engn, Qingdao 266590, Peoples R China
[3] Anqing Normal Univ, Sch Chem & Chem Engn, Anhui Key Lab Funct Coordinat Cpds, Anqing 246011, Peoples R China
来源：
RSC ADVANCES | 2018年 / 8卷 / 38期
基金：
中国国家自然科学基金;
关键词：
BASIC PYRIDYL SITES; COORDINATION POLYMERS; FLUORESCENT-PROBE; AQUEOUS-SOLUTION; SMALL MOLECULES; NAKED-EYE; SENSITIVE DETECTION; LUMINESCENT SENSOR; FE(III) IONS; MOF;
D O I：
10.1039/c8ra02809e
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A novel Eu-based MOF [Eu(IMS1)(2)]Cl4H(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 Fe3+ ions. The results show that complex 1 has a high sensitivity and selectivity for Fe3+ based on a turn-off' effect, for which the electrostatic interaction between Fe3+ 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 Fe3+ and 1 lead to the quenching effect of 1.
引用
收藏
页码：21444 / 21450
页数：7
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