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

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

JOURNAL=Frontiers in Chemistry

VOLUME=9

YEAR=2021

URL=https://www.frontiersin.org/journals/chemistry/articles/10.3389/fchem.2021.726813

DOI=10.3389/fchem.2021.726813

ISSN=2296-2646

ABSTRACT=<p>A series of new complexes, [Ln (2,4-DMBA)<sub>3</sub>(5,5′-DM-2,2′-bipy)]<sub>2</sub> (Ln = Sm(1), Eu (2)), [Pr (2,4-DMBA)<sub>3</sub> (5,5′-DM-2,2′-bipy)]<sub>2</sub>·0.5(C<sub>2</sub>H<sub>5</sub>OH) (3), [Ln (2,4-DMBA)<sub>3</sub> (5,5′-DM-2,2′-bipy)]<sub>2</sub>·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 <bold>1</bold>–<bold>5</bold> are binuclear complexes, but they can be divided into three different crystal structures. The thermal decomposition mechanism of complexes <bold>1</bold>–<bold>5</bold> were investigated by the technology of simultaneous TG/DSC-FTIR. What’s more, the luminescent properties of complexes <bold>1</bold>–<bold>2</bold> and <bold>4</bold> were discussed, and the luminescence lifetime (τ) of complexes <bold>2</bold> and <bold>4</bold> were calculated.</p>