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Experimental and Theoretical Studies of Novel Cadmium(II) N2O-Schiff Base Complexes: Synthesis, Spectroscopic
Yang Song1, Yangyang Zhao2, Zhengnan Zhou2
1School of Chemical and Pharmaceutical Engineering, Chemical Pollution Control Chongqing Applied Technology Extension Center of Higher Vocational Colleges, Chongqing Industry Polytechnic College, Chongqing, 401120, P. R. China. songyang@cqipc.edu.cn.
Abstract:
Three 2,6-dimethoxyaniline Schiff base cadmium(II) complexes were synthesized via a one-pot reaction and characterized by spectroscopic methods (NMR, FT-IR, EA), X-ray crystallography, SEM/EDX and fluorescent spectroscopy. The molecular structures of complexes 1-3 were elucidated by X-ray crystallography, revealing penta-coordinated cadmium(II) centers with distorted square-pyramidal geometries. Mononuclear molecules form supramolecular structures through intermolecular C-H···Cl interactions and π···π stacking interactions, which further stabilize the structures of the complexes. DFT calculations were performed to analyze the electronic structures and frontier molecular orbitals. The fluorescence properties of complexes 1-3 were investigated in both solid-state and solution, exhibiting characteristic emission bands. The study provides insights into the structural and luminescent properties of these cadmium(II) complexes, demonstrating their potential applications as luminescent materials.
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