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Cooperative Crystallization of Heterometallic Indium–Chromium Metal–Organic Polyhedra and Their Fast Proton Conductivity
Author(s) -
Zhai QuanGuo,
Mao Chengyu,
Zhao Xiang,
Lin Qipu,
Bu Fei,
Chen Xitong,
Bu Xianhui,
Feng Pingyun
Publication year - 2015
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201503095
Subject(s) - indium , cubane , chromium , conductivity , polyhedron , crystallography , crystallization , octahedron , metal , crystal structure , molecule , proton , chemistry , materials science , single crystal , imidazole , inorganic chemistry , stereochemistry , organic chemistry , physics , geometry , mathematics , quantum mechanics
Metal–organic polyhedra (MOPs) or frameworks (MOFs) based on Cr 3+ are notoriously difficult to synthesize, especially as crystals large enough to be suitable for characterization of the structure or properties. It is now shown that the co‐existence of In 3+ and Cr 3+ induces a rapid crystal growth of large single crystals of heterometallic In‐Cr‐MOPs with the [M 8 L 12 ] (M=In/Cr, L=dinegative 4,5‐imidazole‐dicarboxylate) cubane‐like structure. With a high concentration of protons from 12 carboxyl groups decorating every edge of the cube and an extensive H‐bonded network between cubes and surrounding H 2 O molecules, the newly synthesized In‐Cr‐MOPs exhibit an exceptionally high proton conductivity (up to 5.8×10 −2 S cm −1 at 22.5 °C and 98 % relative humidity, single crystal).