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- W2004388595 abstract "The spectroscopic feature of the interaction of a cationic dye, 3,3′-diethyl thiacyanine iodide (THIA), with an anionic surfactant, sodium dodecyl sulphate (SDS), in aqueous medium is discussed. SDS induces two metachromatic peaks in THIA at 404 and 380 nm at premicellar concentrations and only the monomeric peak at 425 nm at high postmicellar concentrations. The principal component analysis (PCA) method has been applied to determine the compositions as well as molar absorption coefficient (ε) spectra of the metachromatic dye-surfactant complexes. Results of the PCA method definitely show that the observed peaks at 425, 404 and 380 nm of THIA in the presence of SDS at appropriate concentrations are due to the monomer, dimer, and trimer of THIA, respectively. Moreover, the equilibrium constant between monomer and trimer of the dye and surfactant has also been calculated by the method followed by Vitagliano et al., and found to be in close agreement with that obtained by the PCA method." @default.
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- W2004388595 date "1999-07-01" @default.
- W2004388595 modified "2023-10-17" @default.
- W2004388595 title "Spectral analysis of complexes of the dye, 3,3′-diethyl thiacyanine and the anionic surfactant, SDS by the principal component analysis method" @default.
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- W2004388595 doi "https://doi.org/10.1016/s1386-1425(98)00307-2" @default.
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