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由 3-二甲基氨基苯甲酸和 5,5'-二甲基-2,2'-联吡啶配体合成的新型镧系配合物：晶体结构、热力学及荧光性质

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

作者信息

Hao Ya-Fan, Xu Su-Ling, Shi Quan, Zhao Jin-Jin, Ren Ning, Gao Jie, Zhang Jian-Jun

机构信息

Testing and Analysis Center, College of Chemistry and Materials Science, Hebei Normal University, Shijiazhuang 050024, China.

Hebei Special Equipment Supervision and Inspection Institute, Shijiazhuang 050000, China.

出版信息

Molecules. 2023 Dec 18;28(24):8156. doi: 10.3390/molecules28248156.

DOI:10.3390/molecules28248156
PMID:38138644
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10745311/
Abstract

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)(5,5'-DM-2,2'-bipy)]·2(3-N,N-DMHBA), Ln = (Gd(), Tb()), 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 were studied and the fluorescence lifetime values were determined, and the energy transfer mechanism of complex was elucidated.

摘要

以3-二甲基氨基苯甲酸和5,5'-二甲基-2,2'-联吡啶为配体，通过溶剂蒸发法合成了两种同构的镧系配合物。该结构的通式为[Ln(3-N,N-DMBA)(5,5'-DM-2,2'-bipy)]·2(3-N,N-DMHBA)，其中Ln = (Gd(III), Tb(III))，3-N,N-DMBA = 3-二甲基氨基苯甲酸酯，5,5'-DM-2,2'-bipy = 5,5'-二甲基-2,2'-联吡啶。基于X射线衍射分析，两种配合物均呈现二聚体结构。同时，利用红外光谱和拉曼光谱对配合物的光谱进行了测定。进行了热重红外光谱实验，以研究配合物的热稳定性和分解机理。在1.9至300 K的温度范围内获得了配合物的低温热容测量值。通过热容拟合计算了热力学函数。此外，研究了配合物的荧光光谱，测定了荧光寿命值，并阐明了配合物的能量转移机理。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d4eb/10745311/0c017bf9e881/molecules-28-08156-g013.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d4eb/10745311/263040c4d323/molecules-28-08156-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d4eb/10745311/54f9c7f8fb33/molecules-28-08156-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d4eb/10745311/16454786e6ae/molecules-28-08156-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d4eb/10745311/2816da590005/molecules-28-08156-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d4eb/10745311/2b464060bfaa/molecules-28-08156-g011.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d4eb/10745311/0c017bf9e881/molecules-28-08156-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d4eb/10745311/3820a2bca5bf/molecules-28-08156-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d4eb/10745311/a427d2601e21/molecules-28-08156-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d4eb/10745311/950176d009e0/molecules-28-08156-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d4eb/10745311/f75f6b7504a1/molecules-28-08156-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d4eb/10745311/3fd6300ce5e3/molecules-28-08156-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d4eb/10745311/0ce25985d39e/molecules-28-08156-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d4eb/10745311/263040c4d323/molecules-28-08156-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d4eb/10745311/54f9c7f8fb33/molecules-28-08156-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d4eb/10745311/16454786e6ae/molecules-28-08156-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d4eb/10745311/2816da590005/molecules-28-08156-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d4eb/10745311/2b464060bfaa/molecules-28-08156-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d4eb/10745311/2f2956f2e1e5/molecules-28-08156-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d4eb/10745311/0c017bf9e881/molecules-28-08156-g013.jpg

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