Lanthanide nitrato complexes bridged by the bis-tridentate ligand 2,3,5,6-tetra(2-pyridyl)pyrazine: Syntheses, crystal structures, Hirshfeld surface analyses, luminescence properties, DFT calculations, and magnetic behavior
Publication Date
4-1-2021
Document Type
Article
Publication Title
Journal of Luminescence
Volume
232
DOI
10.1016/j.jlumin.2020.117835
Abstract
Six dinuclear lanthanide(III) nitrato complexes [Ln(NO3)3(H2O)]2(μ-tppz) (where tppz = 2,3,5,6-tetra(2-pyridyl) pyrazine and Ln(III) = Nd (1), Sm (2), Eu (3), Gd (4), Tb (5), and Dy (6)) with bis-tridentate N-heterocyclic 2,3,5,6-tetra(2-pyridyl)pyrazine as bridging ligand have been solvothermally synthesized and characterized via elemental analysis, infrared spectroscopy, thermogravimetric analysis, single-crystal X-ray diffraction, and powder X-ray diffraction. The 3-D Hirshfeld surface and 2-D fingerprint plots show that the main interactions in 1–6 are the O⋯H/H⋯O intermolecular interactions with relative contributions of about 62%. Although the poor lanthanide(III)-centered luminescence properties clearly point to the efficiency of nonradiative quenching processes (presence of water molecules in the coordination sphere of the lanthanide(III) ions), the ligand tppz is better suited to sensitize the lanthanide(III)'s emissions of EuIII and NdIII than SmIII, TbIII, and DyIII. Finally, the magnetic data of DyIII comple×6 reveals antiferromagnetic coupling between DyIII ions.
Funding Number
GLUTQD2011039
Funding Sponsor
National Natural Science Foundation of China
Keywords
2, 3, 5, 6-tetra(2-pyridyl)pyrazine, DFT, Hirshfeld surface, Lanthanide complex, Luminescence
Department
Chemistry
Recommended Citation
Li Ling Cai, Sheng Mei Zhang, Yan Li, Kai Wang, Xue Ming Li, Gilles Muller, Fu Pei Liang, Ya Tao Hu, and Gui Xia Wang. "Lanthanide nitrato complexes bridged by the bis-tridentate ligand 2,3,5,6-tetra(2-pyridyl)pyrazine: Syntheses, crystal structures, Hirshfeld surface analyses, luminescence properties, DFT calculations, and magnetic behavior" Journal of Luminescence (2021). https://doi.org/10.1016/j.jlumin.2020.117835
