Significant photodegradation of carcinogenic organic dyes by a 1D supramolecular heteroleptic Cu(ii) complex under sunlight irradiation


The crucial role of supramolecular interactions in determining the supramolecular layer architecture of the heteroleptic Cu(ii) complex [Cu(l)(imid)(ClO4)](n) synthesized from ortho-vaniline based Schiff base and imidazole co-ligands has been investigated through a detailed study of Hirshfeld surface analysis which is at present of huge interest in crystal engineering. The X-ray study showed that the major interactions which particularly take part in the 1D self-assembly include conventional and non-conventional hydrogen bonding and parallel-displaced pi MIDLINE HORIZONTAL ELLIPSIS pi stacking interactions to form a polymeric ladder-like structure of the studied complex. In the presence of supramolecular assemblies, the synthesized Cu(ii) complex efficiently degrades methylene blue (MB) (35%) and ethidium bromide (EB) (38%) dyes at 290 minutes under sunlight irradiation. The complex exhibited the highest degradation efficiency of about 95-96% after 48 hours of sunlight exposure, demonstrating the important role of this supramolecular copper(ii) complex in effective photo degradation of MB and EB organic dyes under sunlight with its potential application in wastewater treatment and purification. The high performance of the complex is due to its highest photoluminescence lifetime of 22.57 ns.



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Kuila, A; Maity, R; Acharya, P; Brandao, P; Maity, T; Sepay, N; Samanta, BC

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Financial assistance from the DBT, Govt. of India to Mugberia Gangadhar Mahavidyalaya under the Star College Strengthening Scheme (Order No HRD-11011/161/2020-HRD-DBT, Dated 24/08/2020) is sincerely acknowledged by Bidhan Chandra Samanta. FTIR and mass spectroscopic data collection and analyses by Debaprasad Mandal, Dept. of Chemistry, IIT, Ropar, are gratefully acknowledged here. R. M., P. A. and A. K. wish to thank the authority of Mugberia Gangadhar Mahavidyalaya for having laboratory facilities to carry out the experiments. Nayim Sepay wishes to acknowledge Lady Brabourne College, Kolkata, for having laboratory facilities.

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