- Received: July, 10, 2021
- Revised: September, 9, 2021
- Accepted for publication: September, 10, 2021
- DOI 10.26902/JSC_id88419
- Views: 581
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Li M., Li L.-L., Li Peng, Dong W.-K.
School of Chemistry and Chemical Engineering, Lanzhou Jiaotong University, Lanzhou, P. R. China
An unprecedented dinuclear Ni(II) complex [{Ni2(L)(HL)(μ-OAc)(H2O)}2]·3CH3CH2OH is successfully synthesized by the complexation of an asymmetric salamo-based ligand (H2L) and Ni(II) acetate tetrahydrate and characterized by elemental analyses, UV-Vis and IR spectra, and X-ray crystallography analyses. Surprisingly, in the asymmetric unit of the Ni(II) complex, a fully deprotonated ligand (L)2–
unit and a partially deprotonated ligand (HL)– unit wrapps two Ni(II) atoms, with the μ-OAc– anion bridging two adjacent Ni(II) atoms. The two Ni(II) atoms possess different coordination environments and twisted octahedral geometries. The hexacoordinated Ni(II) atom (Ni1) is located in the N2O4
donor cavity, but another hexacoordinated Ni(II) atom (Ni2) is located in a NO5
donor coordination environment. Meanwhile, a 1D chain structure is formed by two
N—O⋯π interactions. Hirshfeld surfaces and fluorescent properties
are investigated.
Keywords: asymmetric salen-based ligand, Ni(II) complex, crystal structure, Hirshfeld surface analysis, fluorescent property