摘要
在水热条件下,利用硫代羟基二乙酸配体[thiodiglycolic acid=H2tda]和TbCl3·nH2O合成了新型稀土配合物[Tb2(tda)3(H2O)2]。单晶结构表明,配合物是以共边多面体[Tb2O16]为基本单元构筑的二维结构,并通过弱相互作用拓展为三维超分子体系。中心原子铽与氧原子的配位数是8和9,分别形成了单帽反四棱柱和三帽三角棱柱构型的空间配位多面体。配体H2tda在配合物中存在两种配位模式:(a)双"顺-顺桥式双齿、螯合桥式三齿"模式和(b)双"螯合双齿、顺-反桥式双齿"模式。荧光光谱研究表明:该配合物在室温下呈现较强的绿色荧光发射。配合物属三斜晶系,空间群P1。
The lanthanide coordination polymer, Tb2（tda）3（H2O）2, and it′s single crystals was self-assembled from thiodiglycolic acid （H2tda） and corresponding terbium（Ⅲ） chlorides under hydrothermal conditions. Single-crystal structure shows that the compound presents a 2D network, an edge-sharing dinuclear polyhedral [Tb2O16] was found to be the building unit of the network, in which the eight-coordinated TbO8 and nine-coordinated TbO9 cores exhibit distinct coordination environments, that is, one is in a distorted monocapped square antiprism surrounding and the other is in a triply capped trigonal prism. The H2tda ligand exhibits two different coordination modes in framework, including mode a： Bis＂syn, syn-bridging bidentate, chelating-bridging tridentate＂, mode b： Bis＂chelating-bridging bidentate, syn, anti-bridging bidentate＂. Eventually, through the weak interaction, the networks formed 3D supramolecular architectures. Photoluminescence measurements indicate that the terbium compound is a strong green emitter in the solid state at room temperature. Crystal data for the complex： triclinic, space group P1, with a=0.794 66（8） nm, b=1.067 96（11） nm, c=1.433 23（14） nm, α=70.517 00（10）°, β=75.648 0（2）°, γ=76.975 0（2）°, V=1.097 26（19） nm3, and Z=2.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2008年第6期913-918,共6页
Chinese Journal of Inorganic Chemistry
基金
国家自然科学基金(No.20773104)
教育部新世纪优秀人才支持计划(No.NCET-06-0891)
陕西省自然科学基金(No.2006B08)
陕西省教育厅科研基金(No.06JK155)资助项目
关键词
铽配合物
合成
晶体结构
荧光性质
terbium complex
synthesis
crystal structures
luminescence properties
