Citation: WANG Hong-Sheng, LI Gong-Chun, WU Yan-Chao, ZHANG Wan-Qiang, CHENG Xin-Hua. Structures and Luminescent Properties of Three Heterotrimetallic Ln(Ⅲ)-Sr(Ⅱ)-K(Ⅰ) Complexes[J]. Chinese Journal of Inorganic Chemistry, ;2018, 34(4): 655-661. doi: 10.11862/CJIC.2018.103 shu

Structures and Luminescent Properties of Three Heterotrimetallic Ln(Ⅲ)-Sr(Ⅱ)-K(Ⅰ) Complexes

1.
School of Chemistry and Chemical Engineering, Xuchang University, Xuchang, Henan 461000, China
2.
Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education), Nankai University, Tianjin 300071, China

Corresponding author: WANG Hong-Sheng, xcuwaller@163.com
Received Date: 11 August 2017
Revised Date: 29 January 2018

Figures(9)

Three coordination polymers with the molecular formula[LnSrK(ptc)₂(H₂O)]_n (Ln=Sm (1), Dy (2), Gd (3), H₃ptc=2, 4, 6-pyridinetricarboxylic acid) were synthesized by hydrothermal reaction of the solutions of Ln(ClO₄)₃, SrCO₃, K₂CO₃ and H₃ptc at 180℃. The structures of three complexes were determined by X-ray single crystal diffraction and the results showed they are isomorphic compounds and crystallize in triclinic system, P1 space group. The ptc ligands bonded with three metal ions Ln (Sm (1), Dy (2) and Gd (3)), Sr, K with two types of coor-dination modes:connecting seven metal ions and connecting eight metal ions. Ln(Ⅲ) is eight-coordinated by six oxygen atoms from carboxyl groups and two nitrogen atoms from two pyridyl rings. Sr(Ⅱ) ion is also eight-coordinated but the coordination atoms are all oxygen atoms. K(Ⅰ) is coordinated by five oxygen atoms. The emission spectra show Sm(Ⅲ)-Sr(Ⅱ)-K(Ⅰ) and Dy(Ⅲ)-Sr(Ⅱ)-K(Ⅰ) complexes both emit the characteristic fluorescence of Sm(Ⅲ) and Dy(Ⅲ). The Gd(Ⅲ)-Sr(Ⅱ)-K(Ⅰ) complex emits green fluorescence but it is resulted from the charge transfer transitions between the ligands and Gd(Ⅲ).
- 2, 4, 6-pyridinetricarboxylic acid,
- rare earth,
- strontium,
- potassium,
- coordination polymer
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沈阳化工大学材料科学与工程学院沈阳 110142