Insight into new mono- and tri-nuclear nickel(II)-based complexes supported by structural variation of salamo-like ligands

Autor: Yu-Jie Ding, Ke-Feng Xie, Ya-Juan Li, Peng Li, Wen-Kui Dong
Rok vydání: 2021
Předmět:
Zdroj: Transition Metal Chemistry. 46:323-334
ISSN: 1572-901X
0340-4285
DOI: 10.1007/s11243-021-00449-5
Popis: New mono- and tri-nuclear Ni(II)-based complexes, [Ni(L1)2] (1) and [{Ni(L2)(DMF)(μ-OAc)}2Ni]·2EtOH·2CH2Cl2 (2), supported by half-salamo- and salamo-like ligands HL1 and H2L2 have been synthesized, respectively. Single-crystal X-ray structural analyses revealed that the Ni(II) atom in the mono-nuclear complex 1 is six-coordinate and the coordination geometry is octahedral. The complex 2 is a tri-nuclear structure, and the three six-coordinate Ni(II) atoms have octahedral geometries. In addition, UV–Vis titration experiments of the two salamo-like ligands with Ni(OAc)2·4H2O in ethanol showed iso-absorption points between 250 and 350 nm, conforming the coordination of HL1 and H2L2 with Ni(OAc)2·4H2O. The fluorescence properties of HL1, H2L2 and their Ni(II) complexes were studied. The supramolecular structures of the two Ni(II) complexes were constructed via intermolecular hydrogen bond interactions. Hirshfeld surfaces analyses and DFT calculations were performed on the two complexes.
Databáze: OpenAIRE
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