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Molar Volume Effect of Pyridylazophenols and Their Metal Chelates on Their Distribution between Aqueous Micellar Pseudophases in Triton X-100 Micellar Solutions

Saitoh, Tohru ; Segawa, Haruki ; Kamidate, Tamio ; Watanabe, Hiroto ; Haraguchi, Kensaku

Bulletin of the Chemical Society of Japan, 1993-12, Vol.66 (12), p.3676-3679 [Periódico revisado por pares]

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Título:
Molar Volume Effect of Pyridylazophenols and Their Metal Chelates on Their Distribution between Aqueous Micellar Pseudophases in Triton X-100 Micellar Solutions
Autor: Saitoh, Tohru ; Segawa, Haruki ; Kamidate, Tamio ; Watanabe, Hiroto ; Haraguchi, Kensaku
Assuntos: Chemistry ; Exact sciences and technology ; General and physical chemistry ; Solution properties ; Solutions
É parte de: Bulletin of the Chemical Society of Japan, 1993-12, Vol.66 (12), p.3676-3679
Descrição: The distribution constants of 2-(2-pyridylazo)phenol (PAP), 2-(2-pyridylazo)-5-methylphenol (PAP-5Me), and metal chelates with PAP and PAP-5Me between aqueous micellar psuedophases were evaluated in aqueous micellar solutions of Triton X-100. The distribution constants were found by measurement of equilibrium shifts in acid-base and complexation reactions in the presence of micelles at an ionic strength of 0.1 ((Na+, H+) ClO4−) and at 293 ± 1 K. The metal chelates (vanadium(V), nickel(II), and iron(II)) had a linear correlation between their logarithmic distribution constants and their van der Waals volumes. PAP and PAP-5Me had a different kind of correlation from the metal chelates did. These results were explained by the difference in the part of the micelles into which hydrophobic chelates and hydrophilic chelating reagents were incorporated.
Editor: Tokyo: The Chemical Society of Japan
Idioma: Inglês

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