Novel Lanthanide Complexes Synthesized from 3-Dimethylamino Benzoic Acid and 5,5′-Dimethyl-2,2′ Bipyridine Ligand: Crystal Structure, Thermodynamics, and Fluorescence Properties

被引:1
|
作者
Hao, Ya-Fan [1 ]
Xu, Su-Ling [2 ]
Shi, Quan [3 ]
Zhao, Jin-Jin [1 ]
Ren, Ning [4 ]
Gao, Jie [5 ]
Zhang, Jian-Jun [1 ]
机构
[1] Hebei Normal Univ, Coll Chem & Mat Sci, Testing & Anal Ctr, Shijiazhuang 050024, Hebei, Peoples R China
[2] Hebei Special Equipment Supervis & Inspect Inst, Shijiazhuang 050000, Peoples R China
[3] Chinese Acad Sci, Dalian Inst Chem Phys, Thermochem Lab, Dalian 116023, Peoples R China
[4] Handan Univ, Coll Chem Engn & Mat, Hebei Key Lab Heterocycl Cpds, Handan 056005, Peoples R China
[5] Hebei GEO Univ, Grad Sch, Shijiazhuang 050031, Peoples R China
来源
MOLECULES | 2023年 / 28卷 / 24期
基金
中国国家自然科学基金;
关键词
supramolecular; lanthanide complexes; low-temperature heat capacity; MOLAR HEAT-CAPACITIES; THERMAL-PROPERTIES; LUMINESCENCE; TEMPERATURE;
D O I
10.3390/molecules28248156
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Two isostructural lanthanide complexes were synthesized by solvent evaporation with 3-dimethylaminobenzoic acid and 5,5 '-dimethyl-2,2 '-bipyridine as ligands. The general formula of the structure is a [Ln(3-N,N-DMBA)3(5,5 '-DM-2,2 '-bipy)]2 center dot 2(3-N,N-DMHBA), Ln = (Gd(1), Tb(2)), 3-N,N-DMBA = 3-Dimethylamino benzoate, 5,5 '-DM-2,2 '-bipy = 5,5 '-dimethyl-2,2 ' bipyridine. Both complexes exhibited dimeric structures based on X-ray diffraction analysis. At the same time, infrared spectroscopy and Raman spectroscopy were used to measure the spectra of the complex. A thermogravimetric infrared spectroscopy experiment was performed to investigate the thermal stability and decomposition mechanism of the complexes. Measurements of the low-temperature heat capacity of the complexes were obtained within the temperature range of 1.9 to 300 K. The thermodynamic function was calculated by heat capacity fitting. In addition, the fluorescence spectra of complex 2 were studied and the fluorescence lifetime values were determined, and the energy transfer mechanism of complex 2 was elucidated.
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页数:14
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