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Crystal Research and Technology |
Cryst. Res. Technol. 39,
505 (2004) - Abstract -
Hydrothermal synthesis and structure of a novel terbium coordination polymer with packing cavities, {[Tb(TCB)1/2(H2TCB)1/2(H2O)](H2O)2}n (H2TCB = 1, 2, 4, 5-benzenetetracarboxylic acid)
Mao-Lin Hu, Nan-Wen Zhu*, Xin-Hua Li, and Fan Chen
Department of Chemistry and Material Science, Wenzhou Normal College, Wenzhou, Zhejiang 325027, China
*School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| Keywords | coordination polymer, terbium(III), crystal structure, 1,2,4,5-benzenetetracarboxylic acid |
| PACS | 61.66.Hq |
| DOI | 10.1002/crat.200310218 |
A novel terbium coordination polymer {[Tb(TCB)1/2(H2TCB)1/2(H2O)](H2O)2}n (H2TCB = 1, 2, 4, 5-benzenetetracarboxylic acid) (1) has been hydrothermally synthesized and determined by single crystal X-ray diffraction method, which features a very interesting three-dimensional framework with large packing cavities. It crystallizes in the monoclinic space group P21/n with a = 1.0723(4) nm, b = 0.7168(3) nm, c = 1.7155(6) nm, β= 97.079(4)°, V = 1.3086(8) nm3, Z = 4, and final R1 = 0.0203, wR2 = 0.0404. In 1, the protonated carboxylate groups are free, the other carboxylate groups are bonded to Tb3+ ion in three modes: the chelating bidentate, the bridging bidentate and bridging tridentate. Moreover each Tb3+ ion is coordinated by nine oxygen atoms from six carboxylate groups and one water molecule respectively to complete a deformed tricapped trigonal prismatic geometry.
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