Insight into Rare Structurally Characterized Homotrinuclear CuII Non-Symmetric Salamo-Based Complex

A rare homotrinuclear Cu-II salamo-based complex [Cu-3(L)(2)(mu-OAc)(2)(H2O)]center dot 2CHCl(3)center dot 5H(2)O was prepared through the reaction of a non-symmetric salamo-based ligand H2L and Cu(OAc)(2)center dot H2O, and validated by elemental analyses, UV-Visible absorption, fluorescence and infrared spectra, molecular simulation and single-crystal X-ray analysis techniques. It is shown that three Cu-II atoms and two wholly deprotonated ligand (L)(2-) moieties form together a trinuclear 3:2 (M:L) complex with two coordination water molecules and two mu-dentate briging y-acetate groups (mu-OAc-). Besides, the Hirshfeld surface analysis of the Cu-II complex was investigated. Compared with other ligands, the fluorescent strength of the Cu-II complex was evidently lowered, showing that the Cu-II ions possess fluorescent quenching effect.

Automated summary

A rare homotrinuclear Cu-II salamo-based complex was synthesized and its structure was validated through various analysis techniques, showing a fluorescent quenching effect of the Cu-II ions.