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基于2,4-二甲基苯甲酸和5,5'-二甲基-2,2'-联吡啶的五种双核镧系配合物：晶体结构、热行为及发光性质

Five Dinuclear Lanthanide Complexes Based on 2,4-dimethylbenzoic Acid and 5,5'-dimethy-2,2'-bipyridine: Crystal Structures, Thermal Behaviour and Luminescent Property.

作者信息

Zhao Jia-Yuan, Ren Ning, Zhang Ying-Ying, Tang Kun, Zhang Jian-Jun

机构信息

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

Hebei Key Laboratory of Heterocyclic Compounds, College of Chemical Engineering and Material, Handan University, Handan, China.

出版信息

Front Chem. 2021 Oct 18;9:726813. doi: 10.3389/fchem.2021.726813. eCollection 2021.

DOI:10.3389/fchem.2021.726813
PMID:34733818
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8559305/
Abstract

A series of new complexes, [Ln (2,4-DMBA)(5,5'-DM-2,2'-bipy)] (Ln = Sm(1), Eu (2)), [Pr (2,4-DMBA) (5,5'-DM-2,2'-bipy)]·0.5(CHOH) (3), [Ln (2,4-DMBA) (5,5'-DM-2,2'-bipy)]·0.5(2,4-DMBAH)·0.25(5,5'-DM-2,2'-bipy) (Ln = Tb (4), Dy (5)) (2,4-DMBA = 2,4-dimethylbenzoate, 5,5'-DM-2,2'-bipy = 5,5'-dimethy-2,2'-bipyridine) were synthesized via hydrothermal reaction conditions. The complexes were characterized through elemental analysis, Infrared spectra (IR), Raman (R) spectra, UV-Vis spectra, single X-ray diffraction. Single crystal data show that complexes - are binuclear complexes, but they can be divided into three different crystal structures. The thermal decomposition mechanism of complexes - were investigated by the technology of simultaneous TG/DSC-FTIR. What's more, the luminescent properties of complexes - and were discussed, and the luminescence lifetime (τ) of complexes and were calculated.

摘要

通过水热反应条件合成了一系列新的配合物，[Ln(2,4 - 二甲基苯甲酸)(5,5'-二甲基 - 2,2'-联吡啶)]（Ln = Sm(1)，Eu(2)），[Pr(2,4 - 二甲基苯甲酸)(5,5'-二甲基 - 2,2'-联吡啶)]·0.5(CH₂OH) (3)，[Ln(2,4 - 二甲基苯甲酸)(5,5'-二甲基 - 2,2'-联吡啶)]·0.5(2,4 - 二甲基苯甲酸氢)·0.25(5,5'-二甲基 - 2,2'-联吡啶)（Ln = Tb(4)，Dy(5)）（2,4 - 二甲基苯甲酸 = 2,4 - 二甲基苯甲酸酯，5,5'-二甲基 - 2,2'-联吡啶 = 5,5'-二甲基 - 2,2'-联吡啶）。通过元素分析、红外光谱（IR）、拉曼（R）光谱、紫外 - 可见光谱、单晶X射线衍射对配合物进行了表征。单晶数据表明配合物为双核配合物，但它们可分为三种不同的晶体结构。采用同步TG/DSC - FTIR技术研究了配合物的热分解机理。此外，讨论了配合物的发光性质，并计算了配合物的发光寿命（τ）。

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