A new cyclic supramolecular Zn(ii) complex derived from a N2O2 oxime chelate ligand with luminescence mechanochromism

Abstract

A new Zn(II) complex was synthesized based on a new Salen-type tetradentate N₂O₂ bisoxime chelate ligand (H₂L) derived from 1-phenyl-3-methyl-4-benzoyl-5-pyrazolone (PMBP) and 1,2-bis(aminooxy)ethane. Single-crystal X-ray diffraction analysis reveals that the structure of the Zn(II) complex features a three-dimensional (3D) cyclic supramolecular system via intermolecular hydrogen bonds. Moreover, the solid-state photoluminescent properties demonstrate that the Zn(II) complex exhibits unusual luminescence mechanochromism tuned by CH₃OH.