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Preparation, Crystal Structure, and Properties of Five Metal-Organic Complexes Based on a Triangular Nonplanar Carboxylate Ligand

  1. Haiyan He1,
  2. Handong Yin2,
  3. Daqi Wang2,
  4. Huiqing Ma1,
  5. Guoqing Zhang1,
  6. Daofeng Sun1

Article first published online: 3 SEP 2010

DOI: 10.1002/ejic.201000364

Issue

European Journal of Inorganic Chemistry

European Journal of Inorganic Chemistry

Volume 2010, Issue 30, pages 4822–4830, October 2010

Additional Information

How to Cite

He, H., Yin, H., Wang, D., Ma, H., Zhang, G. and Sun, D. (2010), Preparation, Crystal Structure, and Properties of Five Metal-Organic Complexes Based on a Triangular Nonplanar Carboxylate Ligand. Eur. J. Inorg. Chem., 2010: 4822–4830. doi: 10.1002/ejic.201000364

Author Information

  1. 1

    Key Lab of Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, P. R. China, Fax: +86-88364218

  2. 2

    Department of Chemistry, Liaocheng University, Liaocheng, 252059, P. R. China

Publication History

  1. Issue published online: 12 OCT 2010
  2. Article first published online: 3 SEP 2010
  3. Manuscript Received: 1 APR 2010

Funded by

  • National Science Foundation of China. Grant Numbers: 90922014, 20701025
  • National Science Foundation of Shandong Province. Grant Numbers: Y2008B01, BS2009CL007
  • Shandong University

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Keywords:

  • Metal-organic frameworks;
  • Hydrothermal synthesis;
  • Ligand effects;
  • Photoluminescence;
  • Crystal growth

Abstract

A nonplanar triangular carboxylate ligand has been synthesized and applied to assemble metal-organic frameworksunder hydro- or solvothermal conditions. Five new metal-organic complexes, [H2N(CH3)2]2[Cd(HTMBTC)2]·2H2O·dmf (1), [Cu3(TMBTC)2(2,2′-bpy)2]·H2O (2), [Zn3(TMBTC)2(H2O)2]·H2O (3), [Cd3(TMBTC)2(H2O)4]·4H2O (4), and [Cu3(TMBTC)2](5), (dmf = dimethylformamide; TMBTC = 2,4,6-trimethylbenzene-1,3,5-tricarboxylic acid; bpy = bipyridine) were crystallized; they possess four different structural types. In 1, the nonplanar carboxylate ligand connects the cadmium ion to give rise to a 2D (4,4) topological layer that contains two vertical left- and right-handed helical chains. In 2, the carboxylate ligands first link the copper ions to generate a 1D tubular unit, which can be considered the basic building block. The 1D tubular units are further connected by the ligand to form a 2D layer structure. Complexes 3 and 4 have similar structural types. The zinc and cadmium ions are connected by the ligand to form a bilayer framework that contains double (6,3) topological nets. Different from complexes 1–4, complex 5 has a 3D framework. The copper ions are first connected by the ligand to generate a bilayer structure that contains double (6,3) nets, which are further connected by sharing the copper ion to form the final 3D framework. Photoluminescence measurements of 1, 3, and 4 in the solid state at room temperature show that all three coordination networks exhibit similar, strong luminescence, which can be assigned to an intraligand π → π* transition.

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