An Investigation of Complexation of Cadmium(II) with Arginine
| Autor: | Maria Rosa Festa, Lorella Gentile, Emilio Bottari |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
chemistry.chemical_classification
Cadmium Polarography Arginine Electromotive force Ligand Inorganic chemistry Biophysics chemistry.chemical_element Ionic bonding Biochemistry Amino acid chemistry Physical and Theoretical Chemistry Amalgam (chemistry) Molecular Biology arginine cadmium(ii) complexes polarography potentiometry |
| Zdroj: | Journal of Solution Chemistry. 42:823-840 |
| ISSN: | 1572-8927 0095-9782 |
| Popis: | Among amino acids, arginine is important in human physiology because it plays an important role in cardiovascular and depression problems. In this paper the behavior of arginine as a ligand toward cadmium(II) [Cd(II)] in two different ionic media: 1.00 mol·dm−3 NaCl and NaClO4, is studied. Knowledge of the species formed between Cd(II) and arginine in a wide concentration range is useful also in biology. This system was investigated using two different methods in two ranges of hydrogen ion concentration. In acidic solutions, electromotive force measurements are performed using glass and Cd amalgam electrodes. In basic solutions, polarography was used and the shift of the half wave potential was measured as a function of the ligand concentration. The experimental data obtained in NaCl solutions are explained by assuming the formation of the species [CdL], [CdHL], [CdL2], [CdHL2] and [CdH2L2]. The data obtained in NaClO4 solutions are explained by assuming the formation of the species [CdL], [CdHL], and [CdH2L2]. In both cases the stability constants are reported. |
| Databáze: | OpenAIRE |
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