title: Synthesis, crystal structure and fluorescence properties of terbium complexes with phenoxyacetic acid and 2,4,6-tris-(2-pyridyl)-s-triazine.
abstract: Two complexes of Tb(3+), Gd(3+) /Tb(3+) and one heteronuclear crystal Gd(3+)/Tb(3+) with phenoxyacetic acid (HPOA) and 2,4,6-tris-(2-pyridyl)-s-triazine (TPTZ) have been synthesized. Elemental analysis, rare earth coordination titration, inductively coupled plasma atomic emission spectrometry (ICP-AES) and thermogravimetric analysis-differential scanning calorimetry (TG-DSC) analysis show that the two complexes are Tb2 (POA)6 (TPTZ)2 · 6H2O and TbGd(POA)6 (TPTZ)2 · 6H2O, respectively. The crystal structure of TbGd(POA)6 (TPTZ)2 · 2CH3OH was determined using single-crystal X-ray diffraction. The monocrystal belongs to the triclinic system with the P-1 space group. In particular, each metal ion is coordinately bonded to three nitrogen atoms of one TPTZ and seven oxygen atoms of three phenoxyacetic ions. Furthermore, there exist two coordinate forms between C6H5OCH2COO(-) and the metal ions in the crystal. One is a chelating bidentate, the other is chelating and bridge coordinating. Fluorescence determination shows that the two complexes possess strong fluorescence emissions. Furthermore, the fluorescence intensity of the Gd(3+)/Tb(3+) complex is much stronger than that of the undoped complex, which may result from a decrease in the concentration quench of Tb(3+) ions, and intramolecular energy transfer from the ligands coordinated with Gd(3+) ions to Tb(3+) ions.
authors: College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, 010021, People's Republic of China.
authors: Zhong-Xia
authors: ZX
authors: Wang
authors: College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, 010021, People's Republic of China.
authors: Ai-Ling
authors: AL
authors: Wang
authors: College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, 010021, People's Republic of China.
authors: Xiao-Yan
authors: XY
authors: Wei
authors: College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, 010021, People's Republic of China.
authors: Yan-Rong
authors: YR
authors: Qu
authors: College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, 010021, People's Republic of China.
authors: Bin
authors: B
authors: Yue
authors: College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, 010021, People's Republic of China.
authors: Jie
authors: J
authors: Kang
authors: College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, 010021, People's Republic of China.
authors: Hai-Bin
authors: HB
authors: Chu
authors: College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, 010021, People's Republic of China.
authors: Yong-Liang
authors: YL
authors: Zhao
mesh_terms: D000085:Acetates / Q000737:chemistry*; D060326:Chemistry Techniques, Synthetic; D018360:Crystallography, X-Ray; D005453:Fluorescence; D005682:Gadolinium / Q000737:chemistry; D049408:Luminescent Agents / Q000737:chemistry*; D013050:Spectrometry, Fluorescence; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet; D013725:Terbium / Q000737:chemistry*; D014227:Triazines / Q000737:chemistry
chemical_list: D000085:Acetates; D049408:Luminescent Agents; D014227:Triazines; D013725:Terbium; D005682:Gadolinium; C002849:2,4,6-tripyridyl-s-triazine; C415326:phenoxyacetic acid
keywords: 2,4,6-tris-(2-pyridyl)-s-triazine; crystal structure; fluorescence property; phenoxyacetic acid; terbium complexes