Ball-Milling-Induced Amorphization of Zeolitic Imidazolate Frameworks (ZIFs) for the Irreversible Trapping of Iodine

被引：190

作者：

Bennett, Thomas D. ^{[1
]}

Saines, Paul J. ^{[2
]}

Keen, David A. ^{[3
]}

Tan, Jin-Chong ^{[4
]}

Cheetham, Anthony K. ^{[1
]}

机构：

[1] Univ Cambridge, Dept Mat Sci & Met, Cambridge CB2 3QZ, England

[2] Univ Oxford, Dept Chem, Oxford OX1 3QR, England

[3] Rutherford Appleton Lab, ISIS Facil, Didcot OX11 0QX, Oxon, England

[4] Univ Oxford, Dept Engn Sci, Oxford OX1 3PJ, England

来源：

CHEMISTRY-A EUROPEAN JOURNAL | 2013年 / 19卷 / 22期

基金：

英国工程与自然科学研究理事会; 欧洲研究理事会;

关键词：

amorphous materials; ball milling; iodine; metalorganic frameworks; zeolites; PRESSURE-INDUCED AMORPHIZATION; METAL-ORGANIC FRAMEWORK; CRYSTAL-STRUCTURES; PORE-SIZE; CAPTURE;

D O I：

10.1002/chem.201300216

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The I2-sorption and -retention properties of several existing zeolitic imidazolate frameworks (ZIF-4, -8, -69) and a novel framework, ZIF-mnIm ([Zn(mnIm)2]; mnIm=4-methyl-5-nitroimidazolate), have been characterised using microanalysis, thermogravimetric analysis and X-ray diffraction. The topologically identical ZIF-8 ([Zn(mIm)2]; mIm=2-methylimidazolate) and ZIF-mnIm display similar sorption abilities, though strikingly different guest-retention behaviour upon heating. We discover that this guest retention is greatly enhanced upon facile amorphisation by ball milling, particularly in the case of ZIF-mnIm, for which I2 loss is retarded by as much as 200 degrees C. It is anticipated that this general approach should be applicable to the wide range of available metalorganic framework-type materials for the permanent storage of harmful guest species.

引用

页码：7049 / 7055

页数：7

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