Catalytic hydrolysis of phosphate esters in microemulsions. 3. Analysis of the hydrolysis products of p-nitrophenyl diphenyl phosphate via 31P NMR

1988 ◽  
Vol 53 (9) ◽  
pp. 2009-2011 ◽  
Author(s):  
Beth A. Burnside ◽  
Linda L. Szafraniec ◽  
Barry L. Knier ◽  
H. Dupont Durst ◽  
Raymond A. Mackay ◽  
...  
Keyword(s):  
31P Nmr ◽  
Phosphate Esters ◽  
Catalytic Hydrolysis ◽  
Hydrolysis Products ◽  
Diphenyl Phosphate ◽  
Hydrolysis Of

scholarly journals Catalytic Hydrolysis of Tricresyl Phosphate by Ruthenium (III) Hydroxide and Iron (III) Hydroxide towards Sensing Application

Sensors ◽  
2020 ◽  
Vol 20 (8) ◽  
pp. 2317
Author(s):  
Lang Zhou ◽  
Bryan Chin ◽  
Alex L. Simonian
Keyword(s):  
Low Cost ◽  
Neutral Condition ◽  
Flight Safety ◽  
Catalytic Hydrolysis ◽  
Tricresyl Phosphate ◽  
Air Exposure ◽  
Metal Hydroxides ◽  
Hydrolysis Products ◽  
Sensing Application ◽  
Hydrolysis Of

Tricresyl phosphate (TCP) is an organophosphorous neurotoxin that has been detected in water, soil and air. Exposure to TCP in cockpit and cabin air poses a severe threat to flight safety and the health of the aircraft cabin occupants. Conventional methods for the detection of TCP in various samples are gas or liquid chromatography coupled to mass spectrometry, which are complex and expensive. To develop a simple low-cost methodology for the real-time monitoring of TCP in the environment, an effective catalyst is demanded for the hydrolysis of TCP under neutral condition. In this study, Ruthenium (III) hydroxide and Iron (III) hydroxide are found to facilitate the production of the alcoholysis and hydrolysis products of TCP, suggesting their role as a catalyst. With this finding, these metal hydroxides provide new potential to realize not only simple colorimetric or electrochemical detection of TCP, but also a simple detoxication strategy for TCP in environment. In addition, the catalytic capability of Ru (III) or Fe (III) hydroxide for TCP gives a hint that they can potentially serve as catalysts for the hydrolysis of alcolyolysis of many other organophosphate compounds.

CATALYTIC HYDROLYSIS OF PHOSPHATE ESTERS IN MICROEMULSIONS. V. THE EFFECT OF COSURFACTANTS

1988 ◽  
Vol 9 (5) ◽  
pp. 493-510 ◽  
Author(s):  
Raymond A. Mackay ◽  
Beth A. Burnside ◽  
Stephanie M. Garlick ◽  
Barry L. Knier ◽  
H. Dupont Durst ◽  
...  
Keyword(s):  
Phosphate Esters ◽  
Catalytic Hydrolysis ◽  
Hydrolysis Of

Catalytic hydrolysis of phosphate esters in microemulsions

1988 ◽  
Vol 17 (1) ◽  
pp. 77-81 ◽  
Author(s):  
Barry L. Knier ◽  
H. Dupont Durst ◽  
Beth A. Burnside ◽  
Raymond A. Mackay ◽  
Frederick R. Longo
Keyword(s):  
Phosphate Esters ◽  
Catalytic Hydrolysis ◽  
Hydrolysis Of

Quaternary Heteroarenium Aldoximes as Catalysts for Cleavage of Phosphate Esters

1995 ◽  
Vol 60 (5) ◽  
pp. 883-893 ◽  
Author(s):  
František Hampl ◽  
Jiří Mazáč ◽  
František Liška ◽  
Jiří Šrogl ◽  
Lubomír Kábrt ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Critical Micellar Concentration ◽  
Considerable Effect ◽  
Phosphate Esters ◽  
Hexadecyltrimethylammonium Bromide ◽  
Hydrolytic Cleavage ◽  
Pseudo First Order Reaction ◽  
First Order ◽  
Diphenyl Phosphate ◽  
Hydrolysis Of

1-Methyl- (Ia - Id) and 1-dodecyl-2-, 3- and 4-hydroxyiminomethylpyridinium salts (Ie - Ih), as well as 1-methyl- (IIa) and 1-dodecyl-3-hydroxyiminomethylpyridazinium salts (IIb, IIc), were synthesized as catalysts for hydrolytic cleavage of organophosphates. The activities of the prepared catalysts were evaluated by measuring rate constants of hydrolysis of 4-nitrophenyl diphenyl phosphate (PNPDPP) under conditions of a pseudo-first-order reaction. The observed reactivity of pyridinium aldoximes Ia - Ih towards PNPDPP in neutral or slightly basic aqueous solutions (pH 7.2 and 7.8) depends on the acidity of the hydroxyimino group. The cleavage of PNPDPP is strongly accelerated in solutions of 1-dodecylhydroxyiminomethylpyridinium salts Ie - Ih above their critical micellar concentration (CMC). Considerable effect on the velocity of PNPDPP cleavage was observed when quaternary pyridinium aldoximes Ie - Ih were comicellized with inert cationic tenside hexadecyltrimethylammonium bromide (CTAB). 1-Dodecyl-3-hydroxyiminomethylpyridazinium salts IIb and IIc were unstable in aqueous solutions under the above-mentioned conditions.

Efficient hydrolysis of glucose-1-phosphate catalyzed by metallomicelles with histidine residue

2014 ◽  
Vol 68 (5) ◽  
Author(s):  
Ying Liu ◽  
Xiang-Guang Meng ◽  
Jian-Mei Li ◽  
Xiao-Hong Li ◽  
Wei-Feng Yu
Keyword(s):  
Genetic Information ◽  
Information Transfer ◽  
Catalytic Mechanism ◽  
Phosphate Esters ◽  
Catalytic Hydrolysis ◽  
Challenging Problem ◽  
Buffer Solution ◽  
Group A ◽  
Cell Signal Transduction ◽  
Hydrolysis Of

AbstractPhosphate esters play an important role in genetic information transfer, cell signal transduction, energy transmission and metabolic processes of living beings. Efficient catalytic hydrolysis of phosphate esters is still an attractive and challenging problem. Here, a new 2-amino-N-dodecyl-3-(1H-imidazol-5-yl)propanamide (L2) surfactant was synthesized and its metallomicelles of La3+, Cu2+, Co2+, and Zn2+ complexes were used as mimic metalloenzymes to catalyze the hydrolysis of glucose-1-phosphate (G1P) in a buffer solution at 35°C. The metallomicelle systems can efficiently catalyze the hydrolysis of G1P. The rare-earth metallomicelle LaL2 has the highest catalytic activity compared with those of the transition metal micelles CuL2, CoL2, and ZnL2. Different association behaviors of metallomicelles and substrate G1P were proposed. The imidazole group might accelerate the hydrolysis by activating H2O associated with the metal into a metal-OH− group. A possible catalytic mechanism was also discussed.

scholarly journals Catalytic hydrolysis of CFC-12 over MoO3/ZrO2 -TiO2 solid acid

2020 ◽  
Author(s):  
Zhiqian Li ◽  
Tong Zhou ◽  
Guoqing Ren ◽  
Xiaofang Tan ◽  
Lijuan Jia ◽  
...  
Keyword(s):  
Water Vapor ◽  
Solid Acid ◽  
Hydrolysis Rate ◽  
Vapor Concentration ◽  
Water Vapor Concentration ◽  
Catalytic Hydrolysis ◽  
Hydrolysis Products ◽  
Hydrolysis Temperature ◽  
Continuous Reaction ◽  
Hydrolysis Of

Abstract The catalytic hydrolysis of Difluorodichloromethane(CFC-12) by solid acid of MoO3/ZrO2-TiO2 calcined at different temperature had been studied. The effects of catalytic hydrolysis temperature and water vapor concentration on catalytic hydrolysis of CFC-12were also studied. The results showed that catalytic hydrolysis rate of CFC-12 reached to 98.65% at 400 ℃ when the MoO3/ZrO2-TiO2 catalyst was calcined at 500 ℃ with a concentration of water vapor of 83.18%, and the main hydrolysis products were CO, CO2, HF and HCl. After 30 hours’ continuous reaction, the hydrolysis rate of CFC-12 was 65.34%. The XRD result reveals that the main phase of solid MoO3/ZrO2-TiO2 catalyst is the tetragonal Zr (MoO4)2 with doped TiO2 of anatase.

Catalytic hydrolysis of phosphate esters in microemulsions

1990 ◽  
Vol 135 (2) ◽  
pp. 508-519 ◽  
Author(s):  
Stephanie M Garlick ◽  
H.Dupont Durst ◽  
Raymond A Mackay ◽  
Keith G Haddaway ◽  
Frederick R Longo
Keyword(s):  
Phosphate Esters ◽  
Catalytic Hydrolysis ◽  
Hydrolysis Of
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