Anthraquinone dye, alizarin red S, has several important analytical applications. Its charge transfer complexes with metal ions will be a key for their applicatory uses. For that their various complexes with metal ions, viz., Cr(III), Cu(II), Pb(II), Th(IV) and UO2 (II) were studied spectrophotometrically with the help of a novel graphical method in which stability constants(logK) and molar absorptivity coefficient (Î0 ) of these complexes were determined simultaneously. Standard free energy(ΔGo ), oscillator strength (f), energy of interaction(Ect) and resonance energy (RN) of the charge transfer complexes were also calculated.
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