1997年7月15日
Thiocyanato and iodo complexation of Cadmium(II) ions in micellar solutions of a nonionic surfactant triton x-100
Journal of Colloid and Interface Science
- ,
- ,
- 巻
- 191
- 号
- 2
- 開始ページ
- 391
- 終了ページ
- 397
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1006/jcis.1997.4937
- 出版者・発行元
- Academic Press Inc.
Complexation of the cadmium(II) ion with thiocyanate and iodide ions have been studied by precise titration calorimetry in micellar solutions of a nonionic surfactant Triton X-100 containing 0.4 mol dm-3 NaClO4 as a constant ionic medium at 298 K. With regard to the Cd(II)-SCN- system, the formation of [Cd(NCS)]+ and [Cd(NCS)(SCN)] in aqueous solution and [Cd(NCN)2(SCN)]- in micelles was established, though the complexation in micelles is not extensive. With the Cd(II)-I- system, the formation of [CdI]+, [CdI3]-, and [CdI4]2- was established in aqueous solution together with the formation of [CdI2], [CdI3]-, and [CdI4]2- in micelles. It is revealed that the complexation in micelles is accompanied by relatively large and negative enthalpies, which is ascribed to the enthalpies of transfer of [CdI3]- and [CdI4]2- from aqueous solution to micelles. This suggests that a hydrophobic complex with no capacity to form strong hydrogen bonds in water is favored in micelles.
- ID情報
-
- DOI : 10.1006/jcis.1997.4937
- ISSN : 0021-9797
- SCOPUS ID : 0031571078