【摘要】 采用水热方法合成了1种Pr(Ⅲ)配合物,[Pr(2,5-pdc)(Ac)(H2O)·2H2O]n(2,5-pdc=2,5-吡啶二羧酸根),通过X射线衍射确定了配合物的晶体结构.结果表明,该配合物为单斜晶系,P2(1)/c空间群.在配合物中,Pr(Ⅲ)离子是9配位的,通过醋酸根和2,5-吡啶二羧酸根将配合物连成3D网状结构.室温下测定了配合物晶体粉末的IR光谱,UV-Vis-NIR光谱以及可见区和近红外区的发射光谱.重点研究配合物的发光性能,该配合物在近红外区表现出Pr(Ⅲ)离子的特征发射带,与Pr(Ⅲ)离子的理论发射带相比发生了红移和劈裂现象,可以从配合物的UV-Vis-NIR吸收光谱中得到佐证.更多还原

【Abstract】 One Pr(Ⅲ)complex,[Pr(2,5-pdc)(Ac)(H2O)2H2O]n(2,5-pdc=2,5-pyridine dicarboxylate),was synthesized by the hydrothermal method and its crystal structure was determined by singlecrystal Xray diffraction.Structure analysis reveals that the complex crystallizes in the monoclinic with space group P2(1)/c.In the complex,the Pr(Ⅲ)ions were nine-coordinated and were bridged into 3D network structure by the acetates and 2,5- pyridine dicarboxylates.At room temperature,the IR spectrum、UV-Vis-NIR absorption spectrum and the emission spectra of the complex in the visible and NIR region were measured.The luminescence properties of the complex were emphatically discussed.The emission bands of the NIR spectrum present red-shift and splitting relative to the theoretical values,which were evidenced in the UV-Vis-NIR absorption spectrum.更多还原