A three-dimensional ZnIIcoordination polymer constructed from 1,1'-biphenyl-2,2',4,4'-tetracarboxylate and 1,4-bis(1H-imidazol-1-yl)benzene ligands exhibiting photoluminescence.
Ligands based on polycarboxylic acids are excellent building blocks for the construction of coordination polymers; they may bind to a variety of metal ions and form clusters, as well as extended chain or network structures. Among these building blocks, biphenyltetracarboxylic acids (H4bpta) with C2symmetry have recently attracted attention because of their variable bridging and multidentate chelating modes. The new luminescent three-dimensional coordination polymer poly[(μ5-1,1'-biphenyl-2,2',4,4'-tetracarboxylato)bis[μ2-1,4-bis(1H-imidazol-1-yl)benzene]dizinc(II)], [Zn2(C16H6O8)(C12H10N4)]n, was synthesized solvothermally and characterized by single-crystal X-ray diffraction, elemental analysis and IR spectroscopy. The crystal structure contains two crystallographically independent ZnIIcations. Both metal cations are located on twofold axes and display distorted tetrahedral coordination geometries. Neighbouring ZnIIcentres are bridged by carboxylate groups in the syn-anti mode to form one-dimensional chains. Adjacent chains are linked through 1,1'-biphenyl-2,2',4,4'-tetracarboxylate and 1,4-bis(1H-imidazol-1-yl)benzene ligands to form a three-dimensional network. In the solid state, the compound exhibits blue photoluminescence and represents a promising candidate for a thermally stable and solvent-resistant blue fluorescent material.
Department of Chemistry, Changzhi University, Changzhi 046011, People's Republic of China.
Feng
F
Su
Institute of Molecular Science, Shanxi University, Taiyuan, Shanxi 030006, People's Republic of China.
Liping
L
Lu
Department of Chemistry, Changzhi University, Changzhi 046011, People's Republic of China.
Chengyong
C
Zhou
Department of Chemistry, Changzhi University, Changzhi 046011, People's Republic of China.
Xiaoxia
X
Wang
Department of Chemistry, Changzhi University, Changzhi 046011, People's Republic of China.
Long
L
Sun
Department of Chemistry, Changzhi University, Changzhi 046011, People's Republic of China.
Chun
C
Han
1,1′-biphenyl-2,2′,4,4′-tetracarboxylate; 1,4-bis(1H-imidazol-1-yl)benzene; crystal structure; fluorescence properties; tetrahedral coordination; three-dimensional coordination polymer; topological analysis; zinc complex