|
| << vorige | volgende >> |
Tijdschrift beschrijving
Alle jaargangen van het bijbehorende tijdschrift
Alle afleveringen van het bijbehorende jaargang
Alle artikelen van de bijbehorende aflevering
Details van artikel 7 van 13 gevonden artikelen
| Titel: |
HYDROLYSIS OF P-NITROPHENYL PICOLINATE CATALYZED BY COPPER(II ) COMPLEXES OF LONG ALKYL-PYRIDINES WITH HYDROXYL GROUPS IN MICELLAR SOLUTION |
| Auteur: |
Xiancheng, Zeng Siqing, Cheng Xiaoqi, Yu Zhong, Huang |
| Verschenen in: |
Journal of dispersion science and technology |
| Paginering: | Jaargang 20 (1999) nr. 6 pagina's 1581-1593 |
| Jaar: |
1999-09-01 |
| Inhoud: |
A ternary complex kinetic model for metallomicellar catalysis has been proposed in this paper. Hydrolysis of PNPP influenced by Co-micelles of long alkyl-pHridines with hydroxyl groups and CTAB was investigated in aqueous buffers of pH ranging from 5. 0 to 7. 0 at 30°C at present of Cu2+. The kinetic and the thermodynamic parameters (Kn', Km', KT) were obtained by the kinetic analyses,moreover,the rate constant Kn in metallomi-cellar phase was obtained. The pKε s of the hydroxyl groups of these complexes were determined to be 5. 62,5. 53,5. 34,5. 32,respectively by analyses of pH-rate profiles. The results indicate that pyridine ligands exhibit a great catalysis on the hydrolysis of PNPP,which increases with increasing the hydrocarbon chain length. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 7 van 13 gevonden artikelen
| << vorige | volgende >> |