Abstract
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► New flavonoid derivatives were investigated spectrophotometrically to interact strongly with ds.DNA. ► Thermodynamic parameters obtained from UV studies also point to spontaneous binding of all flavonoid derivatives to ds.DNA. ► These flavonoids like their natural analogues seem to be promising drug candidates according to UV–vis results complemented by viscosity data and structural parameters.
Interactional studies of new flavonoid derivatives (Fl) with chicken blood ds.DNA were investigated spectrophotometrically in DMSO–H
2O (9:1
v/v) at various temperatures. Spectral parameters suggest considerable binding between the flavonoid derivatives studied and ds.DNA. The binding constant values lie in the enhanced-binding range. Thermodynamic parameters obtained from UV studies also point to strong spontaneous binding of Fl with ds.DNA. Viscometric studies complimented the UV results where a small linear increase in relative viscosity of the DNA solution was observed with added optimal flavonoid concentration. An overall mixed mode of interaction (intercalative plus groove binding) is proposed between DNA and flavonoids. Conclusively, investigated flavonoid derivatives are found to be strong DNA binders and seem to be promising drug candidates like their natural analogues.