ChemInform Abstract: PHOTODISSOLUTION KINETICS OF N-GALLIUM ARSENIDE IN 1M POTASSIUM HYDROXIDE AND CALCULATION OF THE STABILIZATION BY SELENIDE. EFFECT OF THE RUTHENIUM(3+) SURFACE TREATMENT

1985 ◽  
Vol 16 (15) ◽  
Author(s):  
P. ALLONGUE ◽  
H. CACHET
Keyword(s):  
Gallium Arsenide ◽  
Surface Treatment ◽  
Potassium Hydroxide ◽  
Kinetics Of

Kinetics and mechanism of cyclization of N-(2-methoxycarbonylphenyl)-N’-methylsulphonamide to 3-methyl-(1H)-2,1,3-benzothiadiazin-4(3H)-one 2,2-dioxide

1991 ◽  
Vol 56 (8) ◽  
pp. 1701-1710 ◽  
Author(s):  
Jaromír Kaválek ◽  
Vladimír Macháček ◽  
Miloš Sedlák ◽  
Vojeslav Štěrba
Keyword(s):  
Potassium Hydroxide ◽  
Acid Catalysis ◽  
Potassium Hydroxide Solution ◽  
Hydroxide Solution ◽  
General Base ◽  
Rate Limiting Step ◽  
Limiting Step ◽  
Cyclization Kinetics ◽  
Rate Limiting ◽  
Kinetics Of

The cyclization kinetics of N-(2-methylcarbonylphenyl)-N’-methylsulfonamide (IIb) into 3-methyl-(1H)-2,1,3-benzothiadiazin-4(3H)-one 2,2-dioxide (Ib) has been studied in ethanolamine, morpholine, and butylamine buffers and in potassium hydroxide solution. The cyclization is subject to general base and general acid catalysis. The value of the Bronsted coefficient β is about 0.1, which indicates that splitting off of the proton from negatively charged tetrahedral intermediate represents the rate-limiting and thermodynamically favourable step. In the solutions of potassium hydroxide the cyclization of dianion of the starting ester IIb probably becomes the rate-limiting step.

KINETICS OF THE REACTION OF SULFIMIDES WITH POTASSIUM HYDROXIDE IN METHANOL

1979 ◽  
Vol 6 (3) ◽  
pp. 429-434 ◽  
Author(s):  
Toshiaki Masuda ◽  
Tetsuo Aida ◽  
Naomichi Furukawa ◽  
Shigeru Oae
Keyword(s):  
Potassium Hydroxide ◽  
Kinetics Of

Examination of Gallium Arsenide Mocvd Reaction Mechanisms

1993 ◽  
Vol 312 ◽  
Author(s):  
Robert S. Windeler ◽  
Robert F. Hicks
Keyword(s):  
Gallium Arsenide ◽  
Reaction Mechanisms ◽  
Film Growth ◽  
Methyl Radicals ◽  
Decomposition Rates ◽  
Rate Limiting Step ◽  
Limiting Step ◽  
Precursor Decomposition ◽  
Rate Limiting ◽  
Kinetics Of

AbstractA mathematical model has been developed of the reactor used by Larsen et al. [1] to study the kinetics of gallium arsenide MOCVD.- Two different surface reactions were considered as the rate-limiting step in film growth below 500°C: (1) the desorption of methyl radicals from adsorbed trimethylgallium, and (2) the reaction of CH3 and H groups from adsorbed trimethylgallium and arsine to make methane. The latter step is consistent with the experimental results. It explains the rapid acceleration of the precursor decomposition rates when they are fed together to the reactor. It also explains why methane is the only hydrocarbon generated from trimethylgallium and arsine decomposition in deuterium at V/Ill ratios greater than 1.0.

Influence of gallium arsenide surface treatment in selenium vapors on subsurface defects

2009 ◽  
Vol 52 (4) ◽  
pp. 411-416
Author(s):  
N. N. Bezryadin ◽  
G. I. Kotov ◽  
Yu. N. Vlasov ◽  
A. A. Starodubtsev ◽  
P. K. Bhatnagar ◽  
...  
Keyword(s):  
Gallium Arsenide ◽  
Surface Treatment ◽  
Subsurface Defects

scholarly journals Low-Cost Temperature Transition Mixtures (TTM) Based on Ethylene Glycol/potassium Hydroxide as Reversible CO2 Sorbents

2021 ◽  
Author(s):  
Marcello Costamagna ◽  
Eleonora Micheli ◽  
Valentino Canale ◽  
Michele Ciulla ◽  
Gabriella Siani ◽  
...  
Keyword(s):  
High Pressure ◽  
Ethylene Glycol ◽  
Potassium Hydroxide ◽  
Low Cost ◽  
Effect Of Temperature ◽  
Temperature Transition ◽  
Component Mixture ◽  
Multiple Absorption ◽  
Optimized Conditions ◽  
Kinetics Of

A low-cost Transition Temperature Mixture (TTM) has been synthesized by mixing ethylene glycol and potassium hydroxide as a new non-aqueous CO<sub>2</sub> sorbent. Boric acid has been added to ensure the reversibility of the system and a small amount of water to modulate the viscosity and optimize the performances. The resulting mixtures have been characterized in terms of viscosity, conductivity and density over temperature (therefore ionicity <i>via</i> Walden plots) and the effect of temperature, pressure and the kinetics of the absorption have been evaluated. Under optimized conditions, the four-component mixture EG/KOH/BA/H<sub>2</sub>O 3:1:1:3 can absorb 24 g<sub>CO2</sub>/kg<sub>sorbent</sub> in 30 minutes at 35°C at 1 atm (59 after 4 h) and 60 g<sub>CO2</sub>/kg<sub>sorbent</sub> in 30 minutes at high pressure (10 and 20 atm, 80 g<sub>CO2</sub>/kg<sub>sorbent</sub> after 50 min), while the desorption is quantitative after 30 minutes at only 60°C under a gentle N<sub>2</sub> flow. The system is robust enough to ensure multiple absorption/desorption cycles.

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