Complexation Kinetics of 8-Quinolinol Derivatives with Ni(II) and Zn(II) at the 1,2-Dichloroethane−Water Interface As Studied by Electrolyte Ascending Electrode Polarography
| Autor: | Seiichi Nishizawa, Takeshi Shioya, Norio Teramae |
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| Rok vydání: | 1999 |
| Předmět: |
chemistry.chemical_classification
Polarography Stereochemistry Metal ions in aqueous solution Kinetics Inorganic chemistry Cationic polymerization Surfaces and Interfaces Electrolyte 1 2-Dichloroethane Condensed Matter Physics chemistry.chemical_compound chemistry Reagent Electrochemistry General Materials Science Spectroscopy Alkyl |
| Zdroj: | Langmuir. 15:2575-2579 |
| ISSN: | 1520-5827 0743-7463 |
| Popis: | Complexation kinetics of 8-quinolinol (HQ) and 5-alkyloxymethyl-8-quinolinols (HCnQ; n = 1, 2, 3, 5, 8) with metal ions M2+ (M = Ni, Zn) at the 1,2-dichloroethane (DCE)−water interface is analyzed by dynamic interfacial tensiometry and electrolyte ascending electrode polarography. Polarographic measurements show that the chemical species formed at the interface is a cationic 1:1 complex (M(Q)+ or M(CnQ)+). For Zn2+, the interfacial complexation is very fast, and its kinetics is controlled by the diffusion of ligands from the bulk DCE phase to the DCE−water interface. On the other hand, for Ni2+, the kinetics is interfacial reaction-controlled and is significantly affected by the alkyl chain length of the chelating reagents. |
| Databáze: | OpenAIRE |
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