期刊
POLYHEDRON
卷 30, 期 9, 页码 1555-1564出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.poly.2011.03.040
关键词
Zn-II complexes; Photoluminescence; 2,2 '-Bipyridine; Catalyst; Transesterification
资金
- Korean Science and Engineering Foundation [R01-2008-000-20704-0, 2009-0074066]
- Ministry of Education, Science and Technology [2009-0082832]
- NRF through the Center for Intelligent Nano-Bio Materials at Ewha Womans University [20090063004]
Six new structures of Zn-II complexes containing 2,2'-bipyridine (2,2'-bpy) ligands have been determined. Halide anions were used as simple coordinating ligands to form a tetrahedral environment around the Zn-II ion. Nitrate and benzoate anions were used as chelating ligands to form an octahedral environment. For non-coordinating ClO4- and bridging SO42- anions, three 2,2'-bpy ligands chelate Zn-II to form an octahedral environment, and both ClO4- and SO42- anions occupy empty positions between the metal cations for charge balance. Polymeric structures of the Zn-II-2,2'-bpy complexes are produced by hydrogen bonding. [Zn(2,2'-bpy)(O2CC6H5)(2)] catalyzed efficiently the transesterification reaction of esters with methanol under the neutral conditions, while the remaining compounds showed very slow conversions. (C) 2011 Elsevier Ltd. All rights reserved.
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