| Autor: |
Sahar H. El-Khalafy, Mahmoud T. Hassanein, Safaa El-din H. Etaiw, Ahmed S. Badr El-Din |
| Jazyk: |
angličtina |
| Rok vydání: |
2017 |
| Předmět: |
|
| Zdroj: |
Arabian Journal of Chemistry, Vol 10, Iss S2, Pp S2829-S2835 (2017) |
| Druh dokumentu: |
article |
| ISSN: |
1878-5352 |
| DOI: |
10.1016/j.arabjc.2013.11.005 |
| Popis: |
The activity of organotin (IV)–copper (I) cyanide coordination polymers [Ph3SnCu (CN)2·L] where L = 1,2-bis(4-pyridyl)ethane (bpe) 1, 4,4′-bipyridine (bpy) 2, methylpyrazine (mepyz) 3 or trans-1,2-bis(4-pyridyl)ethene (tbpe) 4 has been investigated as heterogeneous catalysts for the biomimetic oxidative coupling of 2-aminophenol (OAP) to 2-aminophenoxazine-3-one (APX). The rate of OAP consumption was determined by measuring the amount of dioxygen consumed using a gas burette. All the coordination polymeric catalysts showed high activity for auto-oxidation of OAP. The coordination polymer 4 has been found to be the most reactive catalyst. The rate of auto-oxidation reaction of OAP catalyzed by the coordination polymer 4 has been found to increase with increasing the pH from 7 to 9 then decreased at higher pH. The rate of auto-oxidation reaction showed linear dependence on catalyst concentration and pressure of dioxygen. The rate of reaction has been found to fit a Michaelis–Menten kinetic model for saturation of catalyst sites with increasing OAP concentration. The catalyst 4 showed no deactivation after six runs. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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