Acta Chimica Sinica ›› 2008, Vol. 66 ›› Issue (14): 1663-1668. Previous Articles     Next Articles

镧系间苯二甲酸配位聚合物的晶体结构及铕配合物的荧光特性

付 锋a,b 陈三平b 任宜霞a,b 高胜利*,b   

  1. (a延安大学化学化工学院 陕西省化学反应工程重点实验室 延安 716000)
    (b西北大学化学系 陕西省物理无机化学重点实验室 西安 710069)
  • 投稿日期:2007-09-29 修回日期:2007-12-26 发布日期:2008-07-28
  • 通讯作者: 高胜利

Single Crystal Structures and Fluorescence Property of a Series of Lanthanide Coordination Polymers Incorporating Isophthalate

FU, Feng a,b CHEN, San-Ping b REN, Yi-Xia a,b GAO, Sheng-Li *,b   

  1. (a College of Chemistry and Chemical Engineering, Yan’an University, Yan’an 716000)
    (b Department of Chemistry, Shaanxi Key Laboratory of Physico-Inorganic Chemistry, Northwest University, Xi’an 710069)
  • Received:2007-09-29 Revised:2007-12-26 Published:2008-07-28
  • Contact: GAO, Sheng-Li

Three isophthalate coordination polymers with formula of [Ln2(ip)3(H2O)2]n•n(H2O) (H2ip=isophthalic acid, Ln=Pr (1), Eu (2), n=0; Ln=Ho (3), n=1), were prepared under a hydrothermal condition and characterized by elemental analysis, infrared spectrum, thermal analysis and X-ray single crystal diffraction techniques. All these complexes crystallized in a monoclinic crystal system, P2(1)/n space group. Complexes 1 and 2 are isostructural with dinuclear Ln(III) units in which two metal ions lie in seven- and eight-coordinated environments, respectively, belonging to penta bipyramid and bicapped trigonal prism geometries, while complex 3 is slightly different with the complexes 1 and 2, in which Ho(III) centers locate in monocapped and bicapped trigonal prism geometries, respectively. In these complexes, adjacent metal ions are linked by ip ligands causing right- and left-handed helical chains to form a two dimensional network. Fluorescence spectrum in solid state of complex 2 and its dehydrated products showed strong fluorescence properties.

Key words: isophthalic acid, lanthanide complex, crystal structure, fluorescence spectrum