摘要
通过水热方法合成了2个镧系配合物,[Gd(3,4′-dpdc)_2(HDPP)]_n(1)和{[Dy(3,4′-Hdpdc)_3(H_2O)]·0.5BTB}_n(2)(3,4′-H_2dpdc=3,4′-联苯二甲酸,DPP=1,3-二(4-吡啶基)-丙烷,BTB=1,4-二(1,2,4-三氮唑)-1-丁烷),通过X射线单晶衍射对其结构进行表征。配合物1属单斜晶系,P2_1/c空间群。该配合物为二维层状结构,中心Gd(Ⅲ)离子的配位环境为[GdO_7N]。3,4′-dpdc配体以μ_1∶η~1η~1/μ_2∶η~1η~1和μ_1∶η~1η~1/μ_1∶η~1η~0两种方式桥联Gd(Ⅲ)离子,而HDPP配体是以端基的形式配位于Gd(Ⅲ)离子。配合物2属三斜晶系,P1空间群。配合物2具有一维链状结构,Dy(Ⅲ)离子的配位环境为[Dy O7]。3,4′-Hdpdc配体以μ_2∶η~1η~1配位模式链接相邻的Dy(Ⅲ)离子。未参加配位的BTB通过氢键与一维链连接,进而形成三维超分子结构。固态光致发光测量表明,化合物1和2在350~650 nm范围内显示出宽峰,归因于配体的π*→π跃迁。进一步研究了水溶液中不同沙星类药物对配合物1的发光的影响,实验结果表明该配合物可以识别培氟沙星。
Two lanthanide complexes, [Gd(3,4′-dpdc)2(HDPP)]n(1) and {[Dy(3,4′-Hdpdc)3(H2O)]·0.5 BTB}n(2)(3,4′-H2 dpdc=3,4′-biphenyldicarboxylic acid, DPP=1,3-bis(4-pyridyl)propane, BTB=1,4-bis(1,2,4-triazol-1-yl)butane)were successfully synthesized under hydrothermal reactions, and their structures were characterized by single crystal X-ray diffraction. Complex 1 belongs to monoclinic system, space group P21/c. It is two-dimensional layered structure and consists of [GdO7N] unit. 3,4′-dpdc ligands are connected to the Gd(Ⅲ) ions by μ1∶η~1η~1/μ2∶η~1η~1 and μ1∶η~1η~1/μ1∶η~1η~0 coordination modes. DPP ligands are end-coordinated to Gd (Ⅲ) ions. Complex 2 is a triclinic system, space group P1. The complex shows a one-dimensional chain structure. The coordination environment of Dy(Ⅲ) ion is [DyO7]. The 3,4′-Hdpdc ligands link Dy (Ⅲ) ions in a μ2∶η~1η~1 coordination mode. The BTB molecules are connected to the one-dimensional chains by hydrogen bonds and thus form a threedimensional supramolecular structure. Solid state photoluminescence measurements show that compounds 1 and 2 display broad band in the range of 350 ~650 nm due to the π* →π transition of the ligands. The effect of different floxacins on the luminescence of complex 1 in aqueous solution was studied. The results showed that the complex could identify pefloxacin. CCDC:1814250, 1; 1814251, 2.
作者
周鑫
张美娜
张德春
李夏
姚颖芳
ZHOU Xin;ZHANG Mei-Na;ZHANG De-Chun;LI Xia;YAO Ying-Fang(Department of Chemistry,Capital Normal University,Beijing 100048,China)
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2018年第7期1285-1292,共8页
Chinese Journal of Inorganic Chemistry
基金
国家自然科学基金(No.21471104)资助项目
关键词
镧系配合物
3
4′-联苯二甲酸
晶体结构
荧光
lanthanide complex
3,4’-biphenyldicarboxylic acid
crystal structure
fluorescence