Thermodynamics of intermediate ion–molecule complexes or kinetics of competing reactions? The reactions of low-energy isobutylamine and neopentylamine molecular ions

1986 ◽  
pp. 1577-1580 ◽  
Author(s):  
Steen Hammerum ◽  
Peter J. Derrick
Keyword(s):  
Molecular Ions ◽  
Low Energy ◽  
Ion Molecule Complexes ◽  
Kinetics Of ◽  
Competing Reactions

Persistent Photoconductivity And Thermal Recovery Kinetics Of Low Energy Ar + Bombarded GaAs

1991 ◽  
Vol 223 ◽  
Author(s):  
A. Vaseashta ◽  
L. C. Burton
Keyword(s):  
Deep Level Transient Spectroscopy ◽  
Deep Level ◽  
Thermal Recovery ◽  
Low Energy ◽  
Persistent Photoconductivity ◽  
Transport Parameters ◽  
Excellent Correlation ◽  
Proposed Model ◽  
Transient Spectroscopy ◽  
Kinetics Of

ABSTRACTKinetics of persistent photoconductivity, photoquenching, and thermal and optical recovery observed in low energy Ar+ bombarded on (100) GaAs surfaces have been investigated. Rate and transport equations for these processes were derived and simulated employing transport parameters, trap locations and densities determined by deep level transient spectroscopy. Excellent correlation was obtained between the results of preliminary simulation and the experimentally observed values. The exponential decay of persistent photoconductivity response curve was determined to be due to metastable electron traps with longer lifetime and is consistent with an earlier proposed model.

Fragmentations des cétones aliphatiques métastables. II. Compétition entre éliminations de radicaux hydrocarbonés et d'alcanes.

1982 ◽  
Vol 60 (16) ◽  
pp. 2107-2112 ◽  
Author(s):  
Guy Bouchoux ◽  
Yannik Hoppilliard
Keyword(s):  
Molecular Ions ◽  
Low Energy ◽  
Final States ◽  
Energy Channel ◽  
Aliphatic Ketones ◽  
Thermochemical Stability

The fragmentation of the metas table molecular ions of six aliphatic ketones is studied. The ion fragment abundances [M – R•] and [M–RH] (R• being a lateral radical) can be predicted from the thermochemical stability of the corresponding final states. Exceptions to this behavior are found for metastable molecular ions of methylethylketone and methylisopropylketone where it is demonstrated that the lifetime of these ions is too short to permit significant decompositions via the low energy channel after 10−5 s.

Decay kinetics of high- and low-energy emission in the A band of KCl:Tl

2016 ◽  
Vol 176 ◽  
pp. 175-180 ◽  
Author(s):  
A. Ranfagni ◽  
G.P. Pazzi ◽  
P. Fabeni ◽  
D. Mugnai
Keyword(s):  
Low Energy ◽  
Decay Kinetics ◽  
Energy Emission ◽  
Kinetics Of

scholarly journals Low-energy collisions with atomic and molecular ions in a photocathode electron target

2009 ◽  
Vol 194 (1) ◽  
pp. 012024 ◽  
Author(s):  
A Wolf ◽  
D A Orlov ◽  
C Krantz ◽  
M Lestinsky ◽  
A Shornikov ◽  
...  
Keyword(s):  
Molecular Ions ◽  
Low Energy ◽  
Electron Target

scholarly journals Kinetics of suicide substrates. Practical procedures for determining parameters

1985 ◽  
Vol 227 (3) ◽  
pp. 843-849 ◽  
Author(s):  
S G Waley
Keyword(s):  
Steady State ◽  
Kinetic Parameters ◽  
Experimental Error ◽  
Simulated Data ◽  
Steady State Kinetics ◽  
Linear Plot ◽  
Series Of Experiments ◽  
Kinetics Of ◽  
Competing Reactions ◽  
Suicide Substrates

Many clinically important or mechanistically interesting inhibitors react with enzymes by a branched pathway in which inactivation of the enzyme and formation of product are competing reactions. The steady-state kinetics for this pathway [Waley (1980) Biochem. J. 185, 771-773] gave equations for progress curves that were cumbersome. A convenient linear plot is now described. The time (t1/2) for 50% inactivation of the enzyme (this is also the time for 50% formation of product), or for 50% loss of substrate, is measured in a series of experiments in which the concentration of inhibitor, [I]0, is varied; in these experiments the ratio of the concentration of enzyme to the concentration of inhibitor is kept fixed. Then a plot of [I]0 X t1/2 against [I]0 is linear, and the kinetic parameters can be found from the slope and intercept. Furthermore, simplifications of the equations for progress curves are described that are valid when the concentration of inhibitors is high, or is low, or when the extent of reaction is low. The use of simulated data has shown that the recommended methods are not unduly sensitive to experimental error.

Kinetics of the interaction of azomethane with low-energy electrons on Ag(111)

1991 ◽  
Vol 256 (3) ◽  
pp. 227-241 ◽  
Author(s):  
M.E. Castro ◽  
Laura A. Pressley ◽  
J.M. White
Keyword(s):  
Low Energy ◽  
Low Energy Electrons ◽  
Kinetics Of

Kinetics of growth of surface amorphous layers under irradiation of silicon with low-energy light ions

2003 ◽  
Vol 37 (3) ◽  
pp. 340-346 ◽  
Author(s):  
A. I. Titov ◽  
A. Yu. Azarov ◽  
V. S. Belyakov
Keyword(s):  
Low Energy ◽  
Light Ions ◽  
Kinetics Of

Thermal polymerization of arylacetylenes: spectroscopic and thermal studies

1994 ◽  
Vol 6 (4) ◽  
pp. 347-383 ◽  
Author(s):  
Marie-Florence Grenier-Loustalot
Keyword(s):  
Thermal Properties ◽  
Reaction Mechanisms ◽  
Thermal Studies ◽  
Thermal Polymerization ◽  
Temperature Range ◽  
H Nmr ◽  
Kinetics Of ◽  
Competing Reactions

The reaction mechanisms and kinetics of endcapped ethynyl polyethers were studies in the temperature range 150-220C. The results obtained by '3C and 'H NMR, FrTIR, HPLC and DSC indicate reactivity differences and competing reactions. These materials were cured and their thermal properties evaluated.

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