Zinc and cadmium coordination polymers assembled with 2,2′-bipyridine and bithiophenedicarboxylic acid: Effect of metal ions on the conformation of ligand

Jiao Zhao, Xin Shi, Guanna Li, Xiuli Wang, Can Li*, Qihua Yang

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

18 Citations (Scopus)

Abstract

Two novel metal-organic coordination polymers with the formulas [Zn(btdc)(2,2′-bpy)] n (1) and {[Cd 2(btdc) 2(2,2′-bpy)]·DMF} n (2) have been solvothermally synthesized by the assembly of mixed ligands, H 2btdc and 2,2′-bpy with Zn(NO 3) 2·6H 2O and Cd(NO 3) 2·4H 2O, respectively, where H 2btdc = 2,2′-bithiophene-5,5′-dicarboxylic acid, 2,2′-bpy = 2,2′-bipyridine, and DMF = N,N′-dimethylformamide. Complex 1 is composed with one-dimensional (1D) infinite zigzag polymeric coordination chains, which are further stacked into 3D supramolecular architecture by π-π stacking interaction. Complex 2 possesses 2D layers with the thickness about 1.2 nm, these layers forming a 3D network through π-π stacking interactions. In complex 1, the btdc ligand exists in stable trans conformation and the conformation of btdc ligand in complex 2 is of both trans and cis. Furthermore, these two complexes show enhanced fluorescent emission in comparison with H 2btdc ligand.

Original languageEnglish
Pages (from-to)185-189
Number of pages5
JournalInorganica Chimica Acta
Volume383
DOIs
Publication statusPublished - 30 Mar 2012
Externally publishedYes

Keywords

  • Bithiophenedicarboxylic acid
  • Conformation
  • Luminescence
  • Metal-organic coordination polymers

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