Complexation of cobalt ion with copolypeptide containing tryptophan treated with nitric acid
| Autor: | Hideki Sugimoto, Katsuo Susaki, Eiji Nakanishi, Sadao Hibi |
|---|---|
| Rok vydání: | 1998 |
| Předmět: |
Indole test
chemistry.chemical_classification Polymers and Plastics Metal ions in aqueous solution Inorganic chemistry Nitro compound Tryptophan General Chemistry Condensed Matter Physics chemistry.chemical_compound chemistry Nitric acid Nitration Materials Chemistry Nitro Chelation Nuclear chemistry |
| Zdroj: | Polymer Bulletin. 40:683-688 |
| ISSN: | 1436-2449 0170-0839 |
| Popis: | Tryptophan within copoly(N-hydroxyethyl L-giutamine-co -L-tryptophan) treated with nitric acid (EGT-N) dissociates negatively above pH 10.5 by the electron-attractive effect of nitro groups introduced into the indole ring. The interaction between EGT-N and various metal ions was investigated using UV/VIS, ESCA, and ICP measurement. EGT-N was found to selectively form a complex with cobalt ions above pH 10.5. The formation of the cobalt ion complex of EGT-N was confirmed to be caused by the cooperative coordination of the tryptophan-introduced nitro groups and the OH groups of hydroxyethyl L-glutamine. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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