Interaction of Crystal Violet and Polyanions in Aqueous Solution |
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| Authors: | V Crescenzi F Quadrifoglio V Vitagliano |
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| Institution: | CENTRO NAZIONALE DI CHIMICA DELLE MACROMOLECOLE (CNR) SEZIONE III ISTITUTO CHIMICO UNIVERSITà DI NAPOLI , NAPLES, ITALY |
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| Abstract: | The effect of several polyelectrolytes on the absorption spectrum of crystal violet (CV) has been studied over a wide range of pH. The following polymers were used: isotactic poly(methacrylic acid), PMAi; conventional poly(methacrylic acid), PMAc; a methacrylic acid (80%)-styrene (20%) copolymer, PMAS; and poly(styrene sulfonic acid), PSSA. Distinctly different effects were observed in the four cases. This has been interpreted in terms of a dependence of the degree and mode of binding of cationic dye molecules onto the polyacids on the hydrophobicity of the macroions. |
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