铕掺杂的一维钛氧簇合物Ti4Eu2O4(OOCC6H5)14的制备、晶体结构及表征

Preparation,Crystal Structure and Characterization of One⁃Dimensional Europium⁃Doped Titanium⁃Oxo Cluster of Ti4Eu2O4(OOCC6H5)14

采用完全羧基配位和铕离子掺杂钛氧簇策略,通过溶剂热法制备得到单晶Ti4Eu2O4(OOCC6H5)14(记为POTi4Eu2)。通过元素分析、热重分析、固态紫外可见吸收光谱、红外光谱等技术对POTi4Eu2进行表征,通过液相荧光光谱和固态荧光寿命等技术来研究其光学性质。POTi4Eu2结构包含4个TiO6八面体、2个EuO8十二面体和14个桥联的二齿苯甲酸配体。簇核Ti4Eu2是由14个苯甲酸配体稳定的,14个苯甲酸配体均采用双齿桥配位,分布于钛氧簇的核簇四周,相邻的簇之间通过苯甲酸配体桥联,形成一维链结构。热重分析数据显示单晶POTi4Eu2的结构在空气中256℃以内可以保持稳定。单晶POTi4Eu2的平均荧光寿命为1.63 ms。

Single crystal Ti4Eu2O4(OOCC6H5)14(denoted as POTi4Eu2) was prepared by the solvothermal method,via the strategy of concurrently fully carboxylate-coordinating and the lanthanide-Eu(Ⅲ)-ion-doping.Characterizations of POTi4Eu2 have been performed by elemental analysis,thermogravimetric analysis,solid-state UV-Vis absorption spectroscopy and FT-IR,and its particular optical properties have been shown by liquid-state fluorescence spectra,and solid-state fluorescence lifetime.The structure of POTi4Eu2 contains four TiO6 octahedrons,two EuO8 dodecahedrons and 14 bridged bidentate benzoic acid ligands.The cluster core Ti4Eu2 is stabilized by 14 benzoic acid ligands.The 14 benzoic acid ligands are coordinated by bidentate bridges and are distributed around the core clusters of the titanium oxide cluster.The adjacent clusters are bridged by benzoic acid ligands to form a one-dimensional chain structure.Thermogravimetric analysis data show that the structure of single crystal POTi4Eu2 could remain stable within 256 ℃ in air.The average fluorescence lifetime of single crystal POTi4Eu2 was 1.63 ms.CCDC:1997261.