Synthesis, Structural Characterization, Thermal, and Electrochemical Investigations of a Square Pyramid Manganese(III) Complex With a Schiff Base Ligand Acting as N₂O₂ Tetradentate in Equatorial and as O Monodendate in Axial Positions: Application as a Precursor for Preparation of Mn-Doped ZnO Nanoparticle

Abstract

An unusal square pyramid Mn(III) complex, [Mn(L) (H₂L)]PF₆, where L = (5,5′-Dimethoxy-2,2′-(propane-1,2-diylbis (nitrilomethylidyne))diphenolato), has been synthesized and characterized by single-crystal X-ray diffraction. The complex is crystallized in monoclinic with space group P2₁/n. The Mn atom is coordinated with L Schiff base as N₂O₂ tetradentate ligand in the equatorial position and H₂L as O monodentate in axial position. The electronic and vibrational spectra, and TG-DTG of the complex were also studied. The cyclic voltamograms exhibit irreversible responses assignable to Mn(III)/Mn(II) and Mn(II)/Mn(III). The Mn(III) complex was applied as a precursor for synthesis of Mn-doped ZnO nanoparticles.

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Keywords:

• electrochemical study
• manganese
• Mn-doped ZnO nano
• Schiff base complex
• thermal study
• UV–vis spectroscopy
• X-ray structure

Acknowledgments

The authors wish to thank the University of Isfahan for financially supporting this work.