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A Novel Three-dimensional Mn(Ⅱ) Coordination Polymer Constructed from Biphenyl-3,3?,5,5?-tetracarboxylic Acid and Water

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【作者】 李少东卢丽萍苏峰

【Author】 LI Shao-Dong;LU Li-Ping;SU Feng;Institute of Molecular Science,Shanxi University;

【机构】 Institute of Molecular Science,Shanxi University

【摘要】 The title Mn(Ⅱ) coordination polymer,poly{[heptaaqua-(μ4-bi-phenyl-3,3?,5,5?-tetracarboxylate)-bimanganese(Ⅱ)] pentahydrate},[Mn2(bpta)(H2O)7]n·5n H2O(I),is crystallized from a mixture of biphenyl-3,3?,5,5?-tetracarboxylic acid(H4bpta) and MnCl2·4H2O in waterethanol under room temperature. Its asymmetric unit consists of one and two halves of crystallographically independent Mn(Ⅱ) cations,one fully deprotonated H4 bpta ligand,seven coordinated water molecules and five solvent water as guest molecules. In I,each Mn(Ⅱ) atom is octahedrally coordinated by six oxygen atoms from bpta4- anions and coordinated water molecules. In the Mn(Ⅱ) cations,one half Mn(Ⅱ) ion of them located at a 2-fold axis generating a trinuclear [Mn3(H2O)2(RCOO)2] linker by μ1,1-O(water) and μ1,3-O,O?(carboxylate) bridges and another half Mn(Ⅱ) ion with an inversion is a mononuclear linker. These neighbouring trinuclear and mononuclear Mn(Ⅱ) cations are linked together by biphenyl-3,3?,5,5?-tetracarboxylates to form a three-dimensional framework with a(42.84) topology of a(4,4)-connected net,in which the positions of the trinuclear [Mn3(H2O)2(R-COO)2] linker as a 4-connector linking four bpta4- ligands in I reproduce an eagle-shaped arrangement. The polymeric structure exhibits a water channel with an accessible void of 797.1 ?3,amounting to 15.7% of the total unit-cell volume. Each of the cavities in the network is occupied by solvent water molecules.

【基金】 supported by the National Natural Science Foundation of China(No.21571118)
【所属期刊栏目】 organometallic structural chemistry (2016年12期)
  • 【DOI】10.14102/j.cnki.0254-5861.2011-1180
  • 【分类号】O641.4
  • 【下载频次】28
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