Two new lead coordination polymers,namely,[Pb4(μ3-O)2L2]n (1),[Pb3(μ4-O)2L]n (2) (H2L=N-acetic-5-oxygen-nicotinic acid) have been prepared by the reaction of Pb(NO3)2 with H2L and characterized by elemental analysis,IR and single crystal X-ray diffraction.Polymer 1 crystallizes in the monoclinic C2/c space group,and features [Pb4(μ3-O)2]n rigid inorganic chains,which are further linked by L2-ligands to form a 3D framework.Polymer 2 crystallizes in the orthorhombic P212121 space group,and displays a 3D framework with [Pb3(μ4-O)2]n inorganic chains.The thermodynamic stability and fluorescence properties of 2 were investigated.CCDC:1432217,1;1432218,2.%采用水热法合成了2个以N-乙酸基-5-氧烟酸(H2L)为配体的铅金属-有机配位聚合物:[Pb4(μ3-O)2L2]n(1)和[Pb3(μ4-O)2L]n(2).通过元素分析、红外光谱和X射线单晶衍射进行了结构表征.结构分析表明,聚合物1属单斜晶系,C2/c空间群,其由[Pb4(μ3-O)2]n构成的刚性无机链通过配体L2-连接成三维网络结构.聚合物2属正交晶系,P212121空间群,其三维结构南[Pb3(μ4-O)2]n构成的无机金属链与配体L2-相互连接形成.研究了2的热稳定性及其在室温下的固体荧光性质.
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