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Porous, Conductive Metal‐Triazolates and Their Structural Elucidation by the Charge‐Flipping Method
Author(s) -
Gándara Felipe,
UribeRomo Fernando J.,
Britt David K.,
Furukawa Hiroyasu,
Lei Liao,
Cheng Rui,
Duan Xiangfeng,
O'Keeffe Michael,
Yaghi Omar M.
Publication year - 2012
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201103433
Subject(s) - isostructural , metal , microcrystalline , crystallography , porosity , crystal structure , materials science , metal ions in aqueous solution , ion , chemistry , nanotechnology , composite material , metallurgy , organic chemistry
A new family of porous crystals was prepared by combining 1 H ‐1,2,3‐triazole and divalent metal ions (Mg, Mn, Fe, Co, Cu, and Zn) to give six isostructural metal‐triazolates (termed MET‐1 to 6). These materials are prepared as microcrystalline powders, which give intense X‐ray diffraction lines. Without previous knowledge of the expected structure, it was possible to apply the newly developed charge‐flipping method to solve the complex crystal structure of METs: all the metal ions are octahedrally coordinated to the nitrogen atoms of triazolate such that five metal centers are joined through bridging triazolate ions to form super‐tetrahedral units that lie at the vertexes of a diamond‐type structure. The variation in the size of metal ions across the series provides for precise control of pore apertures to a fraction of an Angstrom in the range 4.5 to 6.1 Å. MET frameworks have permanent porosity and display surface areas as high as some of the most porous zeolites, with one member of this family, MET‐3, exhibiting significant electrical conductivity.