高等学校化学学报

高等学校化学学报 ›› 2000, Vol. 21 ›› Issue (S1): 225.

• Chemistry in Materials Sciences • 上一篇    下一篇

Self-assembly of Tetranuclear Zinc(Ⅱ) Polymer with Mixed Ligands

TAO Jun, TONG Ming-Liang, CHEN Xiao-Ming   

  1. School of Chemistry and Chemical Engineering, Zhongshan University, Guangzhou 510275
  • 出版日期:2000-12-31 发布日期:2000-12-31

Self-assembly of Tetranuclear Zinc(Ⅱ) Polymer with Mixed Ligands

TAO Jun, TONG Ming-Liang, CHEN Xiao-Ming   

  1. School of Chemistry and Chemical Engineering, Zhongshan University, Guangzhou 510275
  • Online:2000-12-31 Published:2000-12-31

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摘要：

Polynuclear zinc(Ⅱ) complexes are of interest because of their intriguing structural and photoluminescent properties[1]. Zinc is easy to form a wide variety of clusters with a number of carboxylates (acetate, benzoate and pivalate), where combination of zinc and the appropiate carboxylic acid yields the oxo-centered cluster as a distinct and well-defined unit[2]. Working towards an extended network based on these clusters, we viewed their Zn-O-C motif as secondary building unit capable of assembly if an organic dicarboxylate and neutral ligands (4,4'-bpy) are used instead of a monocarboxylate. The rigid and divergent character of the additional linkers may allow the articulation of the clusters into a 2D or 3D framework. This simple and potentially universal design strategy is currently being pursued in the construction of coordination polymers with novel topologies and potentially exploitable functions[3,4].[Zn4(OH)2(fa)3(4,4'-bpy)2] (fa=fumarate, 4,4'-bpy=4,4'-bipyridine) was synthesized (Fig. 1) featuring "butterfly" Zn4(OH)2 clusters. All the Zn4(OH)2 clusters linked by chelating and bridging fumarate forms infinite 2D frameworks, which are further pillared by 4,4'-bpy molecules above and below such 2D frameworks to generate 3D infinite framework. Its building unit is shown in Fig. 2. This complex exhibits intense blue fluorescence at 532 nm in the solid state.

Abstract:

Polynuclear zinc(Ⅱ) complexes are of interest because of their intriguing structural and photoluminescent properties[1]. Zinc is easy to form a wide variety of clusters with a number of carboxylates (acetate, benzoate and pivalate), where combination of zinc and the appropiate carboxylic acid yields the oxo-centered cluster as a distinct and well-defined unit[2]. Working towards an extended network based on these clusters, we viewed their Zn-O-C motif as secondary building unit capable of assembly if an organic dicarboxylate and neutral ligands (4,4'-bpy) are used instead of a monocarboxylate. The rigid and divergent character of the additional linkers may allow the articulation of the clusters into a 2D or 3D framework. This simple and potentially universal design strategy is currently being pursued in the construction of coordination polymers with novel topologies and potentially exploitable functions[3,4].[Zn4(OH)2(fa)3(4,4'-bpy)2] (fa=fumarate, 4,4'-bpy=4,4'-bipyridine) was synthesized (Fig. 1) featuring "butterfly" Zn4(OH)2 clusters. All the Zn4(OH)2 clusters linked by chelating and bridging fumarate forms infinite 2D frameworks, which are further pillared by 4,4'-bpy molecules above and below such 2D frameworks to generate 3D infinite framework. Its building unit is shown in Fig. 2. This complex exhibits intense blue fluorescence at 532 nm in the solid state.

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