Citation: Chuanbing HOU, Yingyu LI, Jingyi CHI, Yan DING, Zhiqiang WANG, Hongliang HAN, Xingru LI, Qionghua JIN. Synthesis, physicochemical properties and terahertz time domain spectroscopy of two lanthanide (Eu, Tb) bisphosphonate complexes containing keggin polyoxometalates[J]. Chinese Journal of Inorganic Chemistry, ;2024, 40(1): 135-144. doi: 10.11862/CJIC.20230394 shu

Synthesis, physicochemical properties and terahertz time domain spectroscopy of two lanthanide (Eu, Tb) bisphosphonate complexes containing keggin polyoxometalates

Chuanbing HOU ^{1, 2} ,
Yingyu LI ² ,
Jingyi CHI ² ,
Yan DING ² ,
Zhiqiang WANG ² ,
Hongliang HAN ² ,
Xingru LI ^{1, 2} ,
Qionghua JIN ^{2, 3, 4, 5,,}

1.
School of Resources, Environment and Tourism, Capital Normal University, Beijing 100048, China
2.
Department of Chemistry, Capital Normal University, Beijing 100048, China
3.
State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China
4.
Key Laboratory of Advanced Energy Materials Chemistry, Ministry of Education(Nankai University), Tianjin 300071, China
5.
State Key Laboratory of Rare Earth Resource Utilization, Changchun 130022, China

Corresponding author: Qionghua JIN, jinqh204@163.com; jinqh@cnu.edu.cn
Received Date: 19 October 2023
Revised Date: 19 December 2023

Figures(9)

Two novel lanthanide bisphosphonate complexes containing Keggin polyoxometalates [Eu(L)₄]PW₁₂O₄₀· 2CH₃CN (1) and [Tb(L)₃(H₂O)]PW₁₂O₄₀ (2) (L=tetraethyl ethylenediphosphonate) were synthesized in a mixed solvent of acetonitrile and deionized water. The properties of the two complexes were characterized by single-crystal X-ray diffraction, elemental analysis, infrared spectroscopy, powder X-ray diffraction, thermogravimetric analysis and terahertz time domain spectroscopy. The crystal structure and intermolecular weak force of the complexes were analyzed, and the luminescence and other properties of the complexes were studied. The single crystal X-ray diffraction indicates that the structure of complex 1 is a twisted tetragonal antiprism with Eu (Ⅲ) as the center and L as the ligands chelate. The structure of complex 2 is a twisted single-capped octahedral with Tb(Ⅲ) as the center and L and H₂O as the ligands. The luminescence spectra indicate that all emission peaks of complexes 1 and 2 are due to charge transfer within the metal. In addition, terahertz time-domain spectroscopy has helped in the study of complexes 1 and 2.
- lanthanide complexes,
- fluorescence spectroscopy,
- polyoxometalate,
- terahertz technology
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