Pr(Ⅲ),Yb(Ⅲ)链状配聚物的合成、结构及光物理性能  

Synthesis,structure and photo-physical properties of coordination polymer of Pr(Ⅲ),Yb(Ⅲ)

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作  者:牛淑云[1] 戴慧平[1] 李野[1] 

机构地区:[1]辽宁师范大学化学化工学院,辽宁大连116029

出  处:《辽宁师范大学学报(自然科学版)》2012年第2期202-206,共5页Journal of Liaoning Normal University:Natural Science Edition

基  金:国家自然科学基金项目(20571037);辽宁省教育厅创新团队项目(2007T092)

摘  要:采用水热合成的方法,以肉桂酸为配体,合成了2种Ln(Ⅲ)的配合物[Pr(C9H7O2)3]n(1)和[Yd(C9H7O2)3]n(2)(C9H7O2=肉桂酸根),通过X-射线单晶衍射仪确定了配合物1和2的晶体结构.结构分析表明,1和2均是以(C9H7O2)为桥连配体而形成的1D无限链状结构,但不同构.1是三斜晶系,R3c空间群,晶胞参数为:a=2.263 0(4)nm,b=2.2630(4)nm,c=0.7876(3)nm,α=90°,β=90°,γ=120°;2是单斜晶系,P2(1)空间群,晶胞参数为:a=1.153 36(16)nm,b=0.784 21(11)nm,c=1.30222(18)nm,α=90°,β=94.371(2)°,γ=90°.在室温下测定了2种配合物固态粉末的IR光谱,UV-Vis-NIR光谱以及荧光激发和发射光谱,并进行了分析指认.这2种配合物IR光谱的主要谱带极为相似,它们的UV-Vis-NIR吸收光谱均表现出配体的&’&(跃迁吸收带和稀土离子的f)f特征吸收带.此外,重点讨论了它们的发光性质,尤其是配合物2在NIR区表现出Yb(Ⅲ)的特征发射.Two Ln(Ⅲ) coodination complexes with the ligand cinnamic acid,[Pr(C9H7O2)3]n(1) and [Yd(C9H7O2)3]n(2)(C9H7O2 = cinnamate),have been synthesized by the hydrothermal synthesis method.The structure was determined by single-crystal X-ray diffractometer.Structure analysis shows that both complexes 1 and 2 possess infinite 1D chain using cinnamate(C9H7O2) as the bridging ligand,but they are not isomorphous.complex 1 crystallizes in triclinic system,space group R3c with a=2.2630(4) nm,b=2.2630(4) nm,c=0.7876(3) nm,α=90°,β=90° and γ=120°.complex 2 crystallizes in monoclinic system,space group P2(1) with a=1.15336(16) nm,b=0.78421(11) nm,c=1.30222(18) nm,α=90°,β=94.371(2)° and γ=90°.At room temperature in the solid state,the IR,UV-Vis-NIR and fluorescence excitation and emission spectra of the two complexes were measured and analyzed.The primary absorption bands of IR spectra of the two complexes are very similar,and their UV-Vis-NIR absorption spectra present π→π absorption bands of the ligand and characteristic f-f absorption bands of Ln(Ⅲ) ions.Furthermore,the luminescent properties of complexes 1 and 2 are discussed emphatically,and complex 2 shows the characteristic emissions of the Yb(Ⅲ) ion in the NIR region.

关 键 词:Ln(Ⅲ)配合物 合成 结构 光物理性质 

分 类 号:O614.3[理学—无机化学]

 

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