Chemical Research in Chinese Universities ›› 2019, Vol. 35 ›› Issue (5): 749-754.doi: 10.1007/s40242-019-9142-1

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Two Zinc(Ⅱ) Complexes Based on Trans-(1R,2R)-cyclohexanediamine: Molecular Structure Analyses and Preparation of Composite Membrane

WANG Dawei1, WANG Ying2, ZHUANG Changfu2, ZHAO Ping1, YANG Jing2, SHI Zhengjun1   

  1. 1. Key Laboratory for Forest Resources Conservation and Utilization in the Southwest Mountains of China, Ministry of Education, Southwest Forestry University, Kunming 650224, P. R. China;
    2. Key Laboratory of State Forestry Administration on Highly-efficient Utilization of Forestry Biomass Resources in Southwest China, Southwest Forestry University, Kunming 650224, P. R. China
  • Received:2019-05-23 Online:2019-10-01 Published:2019-09-24
  • Contact: WANG Dawei, SHI Zhengjun E-mail:wdwchem@163.com;shizhengjun1979@163.com
  • Supported by:
    Supported by the Scientific Research Projects of the Yunnan Provincial Education Department, China(Nos.2015Z139, 2015Y299), the Application Basic Research Project of Yunnan Science and Technology Department, China(No.2016FB052) and the Research Launch Fund of Southwest Forestry University, China(No.111921).

Abstract: Two novel complexes Zn2(chda)2(TPA)Cl2(1) and[Zn(chda)2(H2O)2](TPA)(H2O)2(2)[chda is a chiral ligand of trans-(1R,2R)-cyclohexanediamine, H2TPA is terephthalic acid] were synthesized at room temperature. The molecular structures of complexes 1 and 2 were identified by single-crystal X-ray diffraction measurement. The results showed that complex 1 had a binuclear structure, each Zn(Ⅱ) ion was four coordinated by two N atoms of chda, one O atom of TPA and one Cl atom, to construct a distorted tetrahedral geometry. For complex 2, the Zn(Ⅱ) ion was six coordinated by two chda molecules and two water molecules to form a ZnN4O2 octahedral geometry. Complexes 1 and 2 further extended into three-dimensional supramolecular frameworks by hydrogen-bonding interactions. Hirshfeld surface analysis and fingerprint plots were used to further analyze the contribution of different intermolecular interactions. Further, a composite membrane[Zn(chda)2(H2O)2](TPA)(H2O)2/CA was prepared by adding 10%(mass fraction) of complex 2 into cellulose acetate using acetone/chloroform(V:V=1:1) as solvent.

Key words: Zinc(II) complex, Trans-(1R,2R)-cyclohexanediamine, Hirshfeld surface analysis, Composite membrane