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作 者:张竹艳[1] 高山[1] 霍丽华[1] 赵辉[1] 赵经贵[1]
出 处:《无机化学学报》2007年第9期1649-1652,共4页Chinese Journal of Inorganic Chemistry
基 金:黑龙江省自然科学基金(No.B200501);黑龙江省高校骨干教师项目(No.1054G036)资助。
摘 要:由于吡啶氮羧酸及其衍生物具有多种键合模式和广泛的生物学特性,近10年来由其与金属离子所形成的配合物研究已引起了人们的极大关注。作为吡啶氮羧酸衍生物之一的2-氧-1(4H)-吡啶氮乙酸。是合成抗生素的重要医药中间体。而且同时具有羰基和羧基两个配位活性基团。具有灵活多样的配位方式、可塑性强和空间构型多变等结构特点.从而为构筑具有新颖拓扑网络结构和性能的超分子聚合物体系提供了丰富多彩的识别和组装方式。A coordination polymer of {[Co(2-OPA)2(4,4′-bipy)(H2O)2]·6H2O} (2-OPA^-=2-oxo-1(4H)-pyridineacetate anion) was synthesized and characterized by elemental analysis, IR, TG, fluorescence and X-ray single crystal diffraction. The title complex crystallizes in trielinic space group P^-1, with a=0.856 66(17) nm, b =0.859 58 (17) nm, c=1.142 2(2) nm, α=69.64(3)°, β=68.35(3)°, γ=74.88(3)°, and V=0.724 4(3) nm^3, Z=1, R=0.064 4, wR=0.159 8. Each Co atom occupies a special position of inversion center and has an octahedral coordination environment, defined by two carboxyl O atoms from two 2-OPA^- ligands, two N atoms from two 4,4'-bipy ligands and two water molecules. Adjacent Co(Ⅱ) atoms are bridged by 4,4'-bipy ligands, forming a one-dimensional linetype chain structure. The closest Co…Co distance is 1.142 2(2) nm. The results of TG and fluorescent analysis show that the title coordination polymer is stable under 90.2℃ and has three emission peaks at 368, 422 and 484 nm. CCDC: 643626.
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