Water-Stable Metal-Organic Framework for Effective and Selective Cr2O72- Capture through Single-Crystal to Single-Crystal Anion Exchange

被引:34
作者
Ma, Li [1 ]
Yang, Jin [1 ]
Lu, Bing-Bing [1 ]
Li, Cheng-Peng [2 ]
Ma, Jian-Fang [1 ]
机构
[1] Northeast Normal Univ, Key Lab Polyoxometalate Sci, Dept Chem, Changchun 130024, Jilin, Peoples R China
[2] Tianjin Normal Univ, Coll Chem, Tianjin Key Lab Struct & Performance Funct Mol, MOE Key Lab Inorgan Organ Hybrid Funct Mat Chem, Tianjin 300387, Peoples R China
基金
中国国家自然科学基金;
关键词
COORDINATION POLYMER; EFFICIENT; REMOVAL; PERFORMANCE; ADSORPTION; SEPARATION; TOPOLOGY; CHROMIUM; DESIGN; BATCH;
D O I
10.1021/acs.inorgchem.8b01879
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
Effective and selective capture of environmentally toxic Cr2O72- from water is desirable for both environment protection and human health, but it still remains a significant challenge. We present a water-stable cationic metal-organic framework (MOF) with large nanotubular channels (ca. 1.4 X 1.4 nm(2)), (1-Cl). Remarkably, the resulting porous material exhibits rapid aqueous-phase removal of Cr2O72- via an anionexchange manner. Meaningfully, the capture and separation of aqueous Cr2O72- are highly selective even in the presence of other disturbing anions. More importantly, the crystal structure of 1-Cl after anion exchange (1-Cr2O7) could be determined by single crystal X-ray diffraction, elaborating the single-crystal-to-single-crystal (SC-SC) transformation. The Cr2O72- removal process by 1-Cl thus was directly uncovered by the crystal structure of Cr(2)O(7)(2-)incorporated 1-Cr2O7.
引用
收藏
页码:11746 / 11752
页数:7
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