Complexes with a tridentate aroylhydrazone ligand: Microwave solid-state synthesis, crystalline architectures through supramolecular interactions and electrochemical properties

A series of complexes, [CuLCl]·1·5H2O (1); [ML2]·X (X = 0, M = Cd, 2a; X = DMF, M = Hg, 2b; X = DMF, M = Ni, 2c); [Cu2(OOCCH3)2L2]·2CH3OH (3) have been synthesized by microwave solid-state method with a tridentate aroylhydrazone ligand HL (HL = N3-salicyloylpyridine-2-carboxamidrazone). All these compounds were characterized by element analysis, IR, X-ray diffraction and electrochemistry. Crystal analysis revealed that the coordination molecules extended to 3D supramolecular networks through plentiful H-bondings and weak molecular interactions between the ligand moieties and solvent molecules. Meanwhile, these compounds displayed diverse metal or ligand localized electrochemical properties.

Graphical abstractA series of compounds based on a planar anionic aroylhydrazone ligand have been synthesized using a microwave solid-state method. Intra-molecular H-bonding stabilizes the configuration of the ligand around the metal ions and the plentiful inter-molecular H-bonding constructs the interesting 3D supramolecular networks. Nevertheless, these compounds display diverse metal or ligand localized electrochemical properties.Figure optionsDownload full-size imageDownload as PowerPoint slide