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Journals / Anadolu Üniversitesi Bilim ve Teknoloji Dergisi :A-Uygulamalı Bilimler ve Mühendislik / 2017 / Cilt: 18 - Sayı: 3

PROMOTED HYDROLYSIS OF SOME ORGANOPHOSPHATE ESTERS USING SUPPORTED [Cu(tmen)OH(OH)]+

Murat ERDEM
Pages
720–732
Publication Date
2022-10-11
DOI
—
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⚡ TL;DR(Too Long; Didn't Read)

The amount of copper(II) complex in Dowex-supported catalyst was higher than that of smectite-supported one (1.36 mmol/g and 0.88 mmol/g, respectively) and the higher efficiency was obtained when Dowex-supported catalyst was employed in all of the hydrolysis reactions. 222 and 114-fold increasing in pseudo-first-order rate constants compared to the reactions without supported catalyst were observed for the hydrolysis of diethyl-p-nitrophenyl phosphate at pH 8.0 in the presence of Dowex-supported and smectite-supported catalysts.

📌 3 Key Takeaways

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Objective & Hypothesis:In this study, tetramethylethylenediamine copper(II) complex (Cu(tmen)Cl2) was synthesized and natural clay smectite and synthetic Dowex-50WX8resin containing Cu(tmen)(OH)(OH2)+ were prepared via ion exchange process in aqueous solution.
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Key Findings & Data:Dowex- and smectite-supported Cu(tmen)(OH)(OH2)+ were used as a supported catalyst in the hydrolysis reactions of organophosphate compounds of diethyl-p-nitrophenyl phosphate and p-nitrophenyl diphenyl phosphate at different pH values.
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Conclusion & Impact:The amount of copper(II) complex in Dowex-supported catalyst was higher than that of smectite-supported one (1.36 mmol/g and 0.88 mmol/g, respectively) and the higher efficiency was obtained when Dowex-supported catalyst was employed in all of the hydrolysis reactions. 222 and 114-fold increasing in pseudo-first-order rate constants compared to the reactions without supported catalyst were observed for the hydrolysis of diethyl-p-nitrophenyl phosphate at pH 8.0 in the presence of Dowex-supported and smectite-supported catalysts.
🔬Design:Modeling & Simulation
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

In this study, tetramethylethylenediamine copper(II) complex (Cu(tmen)Cl2) was synthesized and natural clay smectite and synthetic Dowex-50WX8resin containing Cu(tmen)(OH)(OH2)+ were prepared via ion exchange process in aqueous solution. Dowex- and smectite-supported Cu(tmen)(OH)(OH2)+ were used as a supported catalyst in the hydrolysis reactions of organophosphate compounds of diethyl-p-nitrophenyl phosphate and p-nitrophenyl diphenyl phosphate at different pH values. Scanning electron microscope attached with energy dispersive X-ray dedector and surface area analyzer were used for the characterization of the supported catalysts. The efficiency of these supported catalysts was evaluated in accordance with pseudo-first-order and Michaelis-Menten enzyme kinetic models. The amount of copper(II) complex in Dowex-supported catalyst was higher than that of smectite-supported one (1.36 mmol/g and 0.88 mmol/g, respectively) and the higher efficiency was obtained when Dowex-supported catalyst was employed in all of the hydrolysis reactions. 222 and 114-fold increasing in pseudo-first-order rate constants compared to the reactions without supported catalyst were observed for the hydrolysis of diethyl-p-nitrophenyl phosphate at pH 8.0 in the presence of Dowex-supported and smectite-supported catalysts.

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Cite This Article

ERDEM, M. (2022). PROMOTED HYDROLYSIS OF SOME ORGANOPHOSPHATE ESTERS USING SUPPORTED [Cu(tmen)OH(OH)]+. Anadolu Üniversitesi Bilim ve Teknoloji Dergisi :A-Uygulamalı Bilimler ve Mühendislik, Cilt: 18 - Sayı: 3, 720–732. https://ajindex.com/articles/438278

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