摘要
采用水热合成法,得到一种钐配位聚合物{[Sm2(2,2'-DPA)3(Phen)2(H2O)2](EtOH)2(H2O)}n(2,2'-DPA=2,2'-联苯二甲酸,Phen=1,10-邻菲咯啉,EtOH=乙醇).利用X射线单晶衍射、红外、荧光等方法研究了其晶体结构及性质.该配位聚合物属于单斜晶系,C2/c空间群,晶胞参数为:a=2.449 67(6)nm,b=1.213 46(3)nm,c=2.299 92(5)nm,α=90°,β=115.598(1)°,γ=90°.Sm3+离子的配位数是9,其中3个2,2'-联苯二甲酸的羧基提供6个配位氧原子;水分子提供1个配位氧原子;邻菲咯啉提供2个配位氮原子;另外,晶格中还存在游离的水分子和乙醇分子.相邻Sm3+离子由2,2'-联苯二甲酸的两个羧基以双齿螯合/双齿螯合形式联结,形成一维"之"字链状结构.配合物的荧光光谱中有三个发射峰,位于559 nm、597 nm、642 nm,分别对应于Sm3+离子的4G5/2→6H5/2,4G5/2→6H7/2,4G5/2→6H9/2能级跃迁.
A Samarium complex {[Sm2（2,2＇-DPA）3（Phen）2（H2O）2]（EtOH）2（H2O）} n（2,2＇-DPA = 2,2＇-Diphenic acid,Phen = 1,10-phenanthroline） has been hydrothermally synthesized and structurally characterized by single crystal X-ray diffraction,IR and fluorescence spectrum.The complex crystallized into Monoclinic system,C2 /c Space group.The unit cell parameters are a = 2.449 67（6） nm,b = 1.213 46（3） nm,c = 2.299 92（5） nm,α = 90°,β = 115.598（1）°,γ = 90°.The coordination number of Sm^3 ＋ is nine,in which six oxygen atoms from the carboxyl groups of three 2,2＇-DPA ligands,one oxygen from water molecule,two nitrogen atoms from Phen molecule.In addition,free water and free ethanol molecules are found in crystal lattice.The Sm3 ＋ are linked together by the 2,2＇-DPA ligands via bidentate-chelating / bidentate-chelating coordination mode,thereby extended to a new ziazag 1D chain structure.The fluorescence spectrum of the title complex has three emission peaks which locate at 559 nm,597 nm and 642 nm,corresponding to 4G5/2 →6H5/2,4G5/2 →6H7/2,4G5/2 →6H9/2 transitions of the Sm^3 ＋ ion respectively.
出处
《首都师范大学学报（自然科学版）》
2010年第2期32-36,共5页
Journal of Capital Normal University：Natural Science Edition
关键词
2
2'-联苯二甲酸
钐
配位聚合物
晶体结构
Samarium complex
2
2＇-Diphenyldicarboxylic Acid
crystal structure
luminescence.
