一种新型羟基铅配合物的合成及其荧光性质

Synthesis and Photoluminescent Properties of A Novel Pb Complex with Hydroxyl Group

以3,5-吡唑二甲酸(H3pdc)为配体,Pb(NO3)2为金属盐,在水热反应条件下通过调节p H,合成了一种新的二维羟基Pb配合物——[Pb2OH(pdc)(H2O)·H2O]n(1),其结构经IR,元素分析和X-射线衍射表征。1(CCDC:1 469 184)属单斜晶系,P21/n空间群,晶胞参数a=10.502(2),b=9.176 5(2),c=10.602(2),β=97.417(7)°,V=1 013.2(3)3,Z=4,R1=0.022 4,wR2=0.045 8,S=1.02。每个不对称结构单元中具有两种不同配位环境的Pb,在同一结构单元中,2个Pb通过羟基O相连,相邻不对称结构单元通过配体连接Pb(Ⅱ)形成二维网络结构。荧光发射光谱研究结果表明:在最大激发波长(264 nm)激发下,1在380 nm,419 nm和440 nm附近显示出较强的荧光性能。

A novel Pb （II） complex with hydroxyl group, [ Pb2 OH （pdc） （ H2 O）·H2O]. （ 1 ）, was prepared by hydro-thermal reaction of 3,5-pyrazole-dicarboxylic acid （ H3 pdc ） with Ph （ NO3 ） 2. The structure was characterized by FF-IR, elemental analysis, and X-single diffractionl 1 （CCDC： 1 469 184） belongs to monoclinic system, space group P21/n with a = 10.502（2）A, b =9. 1765（2）A, c=10.602（2） A, β=97.417（7）°, V=1 013.2（3） A3, Z=4, R, =0.0224, wR2 =0.045 8, S= 1.02. 1 have two different Pb （II） connected with O of hydroxyl group in the asymmetric structure unit of the complex, and the adjacent asymmetric units was connected by the ligands coordinated to the Pb （II） centers to form 2D network. The fluorescence property of 1 was investigated by FL. The result showed that 1 exhibited strong fluorescent property around 380 nm, 419 nm and 440 nm upon an exci- tation band at 264 nm.