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- W2472372019 abstract "Diorganotin(IV) complexes of the general formulae {[R2Sn(L)]2O}(R=Me (1), n-Bu (2), and n-Oct (3); L=anion of mandelic acid) and {[R2Sn(L)]2Cl2}(R=Ph (4)) have been synthesized by conventional thermal method (1a-3a), except 4a and by microwave-assisted reactions (1b-4b). The elemental analysis, IR, NMR ((1)H, (13)C and (119)Sn) and ESI-MS/DART-mass spectral studies revealed that dimeric 1:1 complexes with SnOSn bridges (1-3) are formed possessing distorted trigonal bipyramidal geometry around the Sn atoms, except 4b which exhibits octahedral geometry with SnClSn bridges. The proposed geometries have been validated by density functional theory calculations. Thermal behavior of 1b-4b, studied by using thermogravimetry (TG), differential thermal analysis (DTA) and derivative thermogravimetric (DTG) techniques, indicated that all except 4b are stable up to 200°C. In vitro interaction studies of 1b-4b with CT-DNA were performed by UV-Vis, fluorescence titrations and results suggest that the complexes are binding to DNA via an intercalative mode. The binding affinity and quenching ability were quantified in terms of intrinsic binding constant (Kb) (3.74×10(4)M(-1), 2b; >3.67×10(4)M(-1), 4b; >3.03×10(4)M(-1), 3b; >0.72×10(4)M(-1), 1b) and Stern-Volmer quenching constant (Ksv) (2.16×10(5), 2b; >1.73×10(5), 4b; >1.66×10(5)3b; >1.51×10(5), 1b) which showed high binding affinity of 2b with CT-DNA. The cleavage studies of 1b-4b with pBR322 plasmid DNA was ascertained by agarose gel electrophoresis. They exhibited effective cleavage of supercoiled plasmid DNA into its nicked form (1b, 3b, 4b) and even into its linear form in presence of 2b." @default.
- W2472372019 created "2016-07-22" @default.
- W2472372019 creator A5060359839 @default.
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- W2472372019 date "2016-09-01" @default.
- W2472372019 modified "2023-10-14" @default.
- W2472372019 title "Conventional and microwave-assisted synthesis, characterization, DFT calculations, in vitro DNA binding and cleavage studies of potential chemotherapeutic diorganotin(IV) mandelates" @default.
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- W2472372019 doi "https://doi.org/10.1016/j.jphotobiol.2016.06.040" @default.
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