☆ 4.7 Article

Three interpenetrated copper(II) coordination polymers based on a V-shaped ligand: Synthesis, structures, sorption and magnetic properties

SCIENCE CHINA-CHEMISTRY (2011)

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期刊

SCIENCE CHINA-CHEMISTRY
卷 54, 期 9, 页码 1446-1453

出版社

SCIENCE PRESS
DOI: 10.1007/s11426-011-4347-2

关键词

copper(II); MOF; interpenetration; sorption; magnetic properties

类别

Chemistry, Multidisciplinary

资金

  1. National Basic Research Program of China [2007CB815305]
  2. National Natural Science Foundation of China [21031002, 51073079, 20801029]
  3. Natural Science Foundation of Tianjin, China [10JCZDJC22100]

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Three new Cu-II coordination polymers, [Cu-2(oba)(2)(H2O)(DMF)]center dot 3H(2)O (1), [Cu-4(oba)(4)(DMF)(4)]center dot 4H(2)O center dot DMF (2) and [Cu-2(oba)(hmp)(2)] (3) (H(2)oba = 4,4'-oxybis(benzoic acid), Hhmp = 2-pyridine methanol, DMF = N,N'-dimethylformamide) were synthesized by solvothermal reactions and characterized by single-crystal X-ray diffraction. Both complexes 1 and 2 take three-dimensional (3D) three-fold interpenetrating PtS topology with 1D channels. In complex 3, Cu-4 clusters were formed by the chelating hmp ligands, and then the clusters were further linked by oba ligands to form a 3D three-fold interpenetrating dia topology network. For 2, N-2 sorption shows type I isotherm with BET surface areas of 562 m(2) g(-1) and Langmuir surface area of 747 m(2) g(-1), respectively. At 77 and 87 K, the hydrogen uptakes of complex 2 are 0.89 wt% and 0.57 wt%, respectively. Magnetic investigation showed the ferromagnetic coupling between Cu-II ions and very weak antiferromagnetic interaction between Cu-4 clusters in complex 3.

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