Lanthanide complexes with disulfide ligand generated in situ: Syntheses, crystal structures and fluorescent properties

作者：Wang Xiao Juan; Jiang Zhan Guo; Chen Jing; Feng Yun Long^*

来源：Inorganica Chimica Acta, 2011, 373(1): 270-275.

DOI：10.1016/j.ica.2011.02.053

• Lanthanide complexes
• 2-Mercaptonanicotinic acid
• Crystal structure
• Luminescent property

Five new lanthanide complexes [Ln(2)(DTDN)(4)(phen)(4)]center dot 7H(2)O center dot 2H(3)O(+) (Ln = Nd (1), Sm (2), Eu (3), Tb (4), Dy (5), H2DTDN = 2,2'-dithiodinicotinic acid, phen = 1,10-phenanthroline) have been solvothermally synthesized and characterized by single-crystal X-ray diffraction, elemental analyses, IR spectra, and TG analyses. By in situ oxidation of 2-mercaptonanicotinic acid (2-H2MN), the expected ligand H2DTDN was generated. All crystals are isostructural and crystallize in monoclinic system with space group C2/c. The metal center is eight-coordinated completely by four carboxylic oxygen atoms from four different DTDN2 ligands, and four nitrogen atoms from two phen molecules with a distorted square-antiprismatic geometry. The structures can be considered as two-dimensional (2D) structures and further linked by hydrogen bonds into the final trinodal 4-connected network. Photoluminescence studies revealed that complexes 2-5 exhibit strong fluorescent emission bands in the solid state at room temperature.

• 出版日期2011-7-15
• 单位浙江师范大学