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由2-硝基-1,4-对苯二甲酸和4,4′-联吡啶作为起始原料合成了4个金属银的配位聚合物,{[Ag(4,4′-bipy)]·2-Hnbdc·2H2O·CH3OH}n(1),{[Ag(4,4′-bipy)(2-Hnbdc)]}n(2),{[Ag2(4,4′-bipy)2(2-nbdc)]·2H2O}n(3),和{[Ag2(4,4′-bipy)2(2-nbdc)(H2O)]·2H2O}n(4)。通过IR、元素分析、TG、UV和荧光光谱以及粉末衍射等手段,对配合物进行了表征和性质研究。单晶衍射分析显示,配合物1为1D阴-阳离子型聚合物,配合物2为1D双链结构,且结构中不存在溶剂分子。配合物3和4均为1D链状结构。结构的多样性主要是由配体构象、硝基对苯二甲酸的配位模式以及弱作用(如π-π堆积、Ag…Ag作用以及氢键等)导致的。结构的不同也使得它们的稳定性、紫外吸收以及荧光光谱存在着差异。
Four metal silver coordination polymers were synthesized from 2-nitro-1,4-terephthalic acid and 4,4’-bipyridyl. {[Ag (4,4’-bipy) · 2-Hnbdc · 2H2O · CH 3 OH} n (1), {[Ag (4,4’- bipy) (2-Hnbdc) 2-nbdc) 2H2O} n (3), and {[Ag2 (4,4’-bipy) 2 (2-nbdc) (H2O)] 2H2O} n (4). The complexes were characterized and characterized by IR, elemental analysis, TG, UV and fluorescence spectroscopy and powder diffraction. Single crystal diffraction analysis shows that the complex 1 is a 1D anion-cation polymer, the complex 2 is a 1D double-stranded structure, and there is no solvent molecule in the structure. Complex 3 and 4 are 1D chain structure. The structural diversity is mainly caused by the ligand conformation, the coordinated mode of nitro-terephthalic acid and weak effects such as π-π stacking, Ag ... Ag interaction and hydrogen bonding. The structural differences also make their stability, UV absorption and fluorescence spectra different.