Ion transfer of dyes across the liquid—liquid interface

The transfer behavior of both acidic and basic dyes at the interface between water and some organic solvents has been studied in detail by electrochemical methods, and a transfer mechanism is proposed for both acidic and basic dyes. The equations of interfacial half-wave potentials for both dyes are...

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Bibliographic Details
Published in:Electrochimica acta 1988-05, Vol.33 (5), p.603-611
Main Authors: Sun, Zhisheng, Wang, Erkang
Format: Article
Language:English
Subjects:
Chemistry
Exact sciences and technology
Gas-liquid interface and liquid-liquid interface
General and physical chemistry
Surface physical chemistry
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Summary:The transfer behavior of both acidic and basic dyes at the interface between water and some organic solvents has been studied in detail by electrochemical methods, and a transfer mechanism is proposed for both acidic and basic dyes. The equations of interfacial half-wave potentials for both dyes are deduced in terms of the mechanism and are consistent with the experimental data, respectively. Apparent standard transfer potentials Δ w 0ϕ 0 and Gibbs energies Δ w G 0 are calculated. The effect of dye structure and the nature of organic solvent on the transfer of dye are discussed in detail and a linear empirical relationship between interfacial half-wave potential and dielectric constant of organic phase is inferred for both acidic and basic dyes.
ISSN:0013-4686
1873-3859
DOI:10.1016/0013-4686(88)80058-6