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A Distorted pcu Topological Heterometallic Metal‐Organic Framework with Right‐ and Left Chiral Covalent Layers
Author(s) -
Wen GuiLin,
Han MinLe,
Wang FengWu,
Zhao Xing,
Yin ChengYang
Publication year - 2013
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201300230
Subject(s) - covalent bond , crystallography , metal organic framework , zinc , materials science , zinc nitrate , metal , hydrothermal circulation , chemistry , stereochemistry , topology (electrical circuits) , adsorption , chemical engineering , organic chemistry , mathematics , combinatorics , engineering
An unusual heterometallic 3D framework, [Zn 2 Ca(mip) 2 (Hmip) 2 (bpe)] n ( 1 ), was synthesized by using an alkali‐earth metal (calcium) and a d 10 metal (zinc) under hydrothermal conditions [H 2 mip = 5‐methylisophthalic acid, bpe = 1,2‐bi(4‐pyridyl)ethene]. Single‐crystal X‐ray analysis shows that complex 1 is a pillared‐grid metal‐organic framework (MOF) with nanosized parallelogram channels fully occupied by dangling Hmip – pendants. The most fascinating structural feature of the complex is that the achiral framework pillared by rod‐like bpe is assembled by opposite chiral covalent sheets arranged alternatingly with single left‐ or right‐handed helical chains. Topologically, the framework can be simplified as a distorted uninodal pcu net with the Schläfli symbol of {4 12 · 6 3 }, which is rare representative of an achiral pillared‐layer MOF with chiral sheets comprising only one type of helical chains.