Studies on DNA Interactions and Biological Activities of Lanthanum(III) Complexes with 4-Quinoline Terpyridine and 1,10-Phenanthroline.

Chetana, P. R. and Navya, D. R. and Vibha, V. B. and Srinatha, B. S. and Mohan, A. Dhale (2019) Studies on DNA Interactions and Biological Activities of Lanthanum(III) Complexes with 4-Quinoline Terpyridine and 1,10-Phenanthroline. Asian Journal of Chemistry, 31 (6). pp. 1265-1274.

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Abstract

A series of lanthanum(III) complexes [La(4-qtpy)2(NO3)2](NO3) (1), [La(4-qtpy)3(NO3)](NO3)2 (2), [La(4-qtpy)(phen)(NO3)2](NO3) (3) and [La(4-qtpy)(phen)2(NO3)2](NO3) (4) (4-qtpy = 4′-[(4-quinoline)-2,2′;6′,2′′-terpyridine]) were synthesized and characterized. The cyclic voltammetric studies revealed that the complexes 1 and 3 are redox active. UV-visible absorption spectral studies and viscosity measurements revealed that complexes bind to DNA through intercalation. Complexes 1 and 3 have shown the highest binding propensity (Kb = 4.241 + 0.2 × 106 for 1 and 1.492 + 0.2 × 106 for 3). The results of chemical nuclease studies revealed that the complexes 3 and 4 have shown maximum chemical nuclease activity in the presence of H2O2 and the mechanism involves hydroxyl radicals. The antibacterial activities of the complexes 1 to 4 were tested against Gram positive and Gram negative bacteria in which complex 3 shows comparable results with the standard antibiotic tetracycline. The cytotoxic activities of 4-qtpy and complex 4 were done by MTT assay against HeLa cell lines.

Item Type:	Article
Uncontrolled Keywords:	Terpyridine complexes, Lanthanum(III) complexes, Antibacterial activity, Cytotoxic study
Subjects:	500 Natural Sciences and Mathematics > 04 Chemistry and Allied Sciences > 24 Organic Chemistry
Divisions:	Food Microbiology
Depositing User:	Food Sci. & Technol. Information Services
Date Deposited:	23 Nov 2020 09:20
Last Modified:	23 Nov 2020 09:20
URI:	http://ir.cftri.res.in/id/eprint/14612

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