Oxidative coupling of 2-aminophenol to 2-amino-phenoxazine-3-one catalyzed by organotin (IV)–copper (I) cyanide coordination polymers as heterogeneous catalysts
| Autor: | Safaa El-din H. Etaiw, Ahmed S. Badr El-din, M. Hassanein, Sahar H. El-Khalafy |
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| Rok vydání: | 2017 |
| Předmět: |
2-Aminophenol
Chemistry(all) Coordination polymer General Chemical Engineering Cyanide Inorganic chemistry Copper(I) cyanide 010402 general chemistry 01 natural sciences Catalysis lcsh:Chemistry Reaction rate chemistry.chemical_compound Auto-oxidation Organotin Copper cyanide Polymer chemistry 2-Aminophenoxazine-3-one 010405 organic chemistry Chemistry General Chemistry 0104 chemical sciences Coordination polymers lcsh:QD1-999 Chemical Engineering(all) Oxidative coupling of methane Phenoxazine |
| Zdroj: | Arabian Journal of Chemistry, Vol 10, Iss S2, Pp S2829-S2835 (2017) |
| ISSN: | 1878-5352 |
| DOI: | 10.1016/j.arabjc.2013.11.005 |
| Popis: | The activity of organotin (IV)–copper (I) cyanide coordination polymers [Ph 3 SnCu (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: | OpenAIRE |
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