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Ternary Copper (II) complex based chemical probes for DNA targeting: Cytotoxic activity under visible light
Author(s) -
Shanmugaiah Mathan Kumar,
Mokkandi Palsamy Kesavan,
Lokesh Ravi,
N. Indra Gandhi,
Mitu Liviu,
Jegathalaprathaban Rajesh,
Gurusamy Rajagopal
Publication year - 2019
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.4762
Subject(s) - chemistry , ethidium bromide , acridine orange , denticity , semicarbazone , phenanthroline , trigonal bipyramidal molecular geometry , bipyridine , crystallography , ligand (biochemistry) , stereochemistry , docking (animal) , square pyramid , crystal structure , dna , medicine , apoptosis , biochemistry , receptor , nursing
Among the bio‐metals, copper derivatives of O, N, S donor salicylaldehyde thiosemicarbazones have been obtained large interest due to their potential biological applications. Multisubstituted thiosemicarbazone ligand HL derived, new ternary Cu (II) complexes of [Cu(L)(bpy)] ( 1 ) and [Cu(L)(phen)] ( 2 ) (where, bpy is 2,2′‐bipyridine and phen is 1,10‐phenanthroline) have been synthesized and characterized using different physico‐chemical techniques. Complexes 1 and 2 are structurally characterized by single crystal X‐ray diffraction analysis, which reveals the trigonal bipyramidal distorted square based pyramid geometry of both the complexes 1 and 2 with ONS‐donor thiosemicarbazone bonded at the upper plane. The ground state electronic structures of complexes 1 and 2 have been investigated by using DFT/B3LYP theoretical evaluation with 6‐31G (d,p) and LANL2DZ basis set. The affinity towards DNA and human serum albumin has been evaluated using computational docking analysis and complex 2 exposes significant binding ability towards DNA and human serum albumin, because of its immense hydrophobicity. Consequently, complex 2 have higher antimicrobial in addition to the cytotoxic activity than complex 1 and free ligand HL under visible light. Along with, their apoptosis pathway of cytotoxicity has been evaluated by fluorescent microscopic analysis using acridine orange/ethidium bromide (AO/EB) stains. From these preliminary investigations, we believe that complex 2 can play a role as a more robust pharmacological agent.