Abstract
Homodinuclear cobalt(II) complexes of the tetraiminediphenol macrocycle were synthesized by employing the process of Schiff base condensation reaction of 2,6-diformyl-4-methylphenol and 4-substituted-o-phenylenediamines in the presence of cobalt(II) template. The spectroscopic techniques and mass spectrometry were utilized so as to carry out the characterization for the obtained complexes. On implementing thermal analysis, the complexes were found to exhibit high thermal stability such that they form Co3O4 nanoparticles on thermal decomposition. The diffraction peaks appearing in the X-ray diffraction (XRD) spectra indicated that the nanoparticles were crystalline in nature. Scanning electron microscopy (SEM) was used to identify the surface morphology of Co3O4 nanoparticles. Energy dispersive X-ray spectroscopy (EDS) was undertaken so as to check the chemical purity and stoichiometry of Co3O4 nanoparticles. The size of Co3O4 nanoparticles of all the four complexes was found to be 20–40 nm resulting out of transmission electron microscopy (TEM) which also showed that the nanoparticles were spherical in shape. It has been authenticated with experimental evidence that the substituent present on the macrocycles has made substantial impact on the surface morphology, particle size and band gap of Co3O4. UV–Vis spectroscopic technique clearly reveals the quantum confinement effects of the title material.
Graphic abstract
Synthesis of homogeneous, spherical shaped nanocrystalline Co3O4 using homodinuclear Co(II)complexes of tetraiminediphenol macrocycle as precursor for the first time by thermal decomposition.
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Acknowledgements
VP is grateful to Dr Samar Kumar Das as well as UGC-NRC, School of Chemistry, University of Hyderabad, for having given the facility to do the required characterizations.
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Pushpanathan, V., Dhas, S.S.J. & Kumar, D.S. Investigation on the substituent effects of homodinuclear cobalt(II) complexes of tetraiminediphenol macrocycle on the synthesis of pure Co3O4 nanoparticles. Bull Mater Sci 44, 279 (2021). https://doi.org/10.1007/s12034-021-02562-8
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DOI: https://doi.org/10.1007/s12034-021-02562-8