Chemical Research in Chinese Universities ›› 2014, Vol. 30 ›› Issue (6): 889-893.doi: 10.1007/s40242-014-4178-8

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Template-directed Synthesis of Three Metal Oxalates via 4-Connected Building Units

TIAN Ruijing1, WANG Fuxiang1, DU Chunyu1, FENG Lijuan1, LIU Ying1, ZHANG Cailing1, PAN Qinhe1,2   

  1. 1. Key Study Center of the National Ministry of Education for Tropical Resources Utilization, Department of Materials and Chemical Engineering, Hainan University, Haikou 570228, P. R. China;
    2. State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun 130012, P. R. China
  • Received:2014-05-12 Revised:2014-06-20 Online:2014-12-01 Published:2014-06-30
  • Contact: PAN Qinhe E-mail:panqinhe@163.com
  • Supported by:

    Supported by the National Natural Science Foundation of China(Nos.21101047, 11204057), the Program for New Century Excellent Talents in Universities of China(No.NCET-11-0929), the Natural Science Foundation of Hainan Province, China(No. 112003), the Scientific Research Foundation in University of Hainan Province, China(No.Hjkj2012-06) and the Young Scientist Foundation of Hainan University, China(Nos.qnjj1237, qnjj1251).

Abstract:

Three novel compounds, [Co(en)3]2[Zr2(C2O4)7]·2H2O(HNU-2, en=ethylenediamine), [Co(NH3)6]·[Ce(C2O4)3(H2O)]·H2O(HNU-3) and [Co(dien)2][Gd(C2O4)3]·0.75H2O(HNU-4, dien=dethylenetriamine) were hydrothermal synthesized based on the templates of [Co(en)3]Cl3, [Co(NH3)6]Cl3 and [Co(dien)2]Cl3, respectively. The Zr4+, Ce3+ and Gd3+ cations are all coordinated by four oxalates to form [M(C2O4)4(H2O)n]m-(M=Zr, Ce or Gd; n=0 or 1; m=4 or 5), which are similar to [In(C2O4)4]5- in NKB-1, and can be regarded as 4-connected building units. The [M(C2O4)4(H2O)n]m- units are connected via sharing the bis-bidentate bridging oxalate ligands to form binuclears in HNU-2 and 1D “zigzag” chains in HNU-3 and HNU-4. It is suggested that these compounds could be used as molecular building units to design 3D open frameworks with zeolite topologies.

Key words: Coordination polymer, Template-directed synthesis, Metal oxalate