Effect of the structural nonequilibrium of solid samples on the low temperature limit of the photochemical reaction rate

2011 ◽  
Vol 85 (11) ◽  
pp. 2027-2032 ◽  
Author(s):  
V. A. Titov
Keyword(s):  
Low Temperature ◽  
Photochemical Reaction ◽  
Reaction Rate ◽  
Temperature Limit ◽  
Solid Samples

Quantum Low-Temperature Limit of a Chemical Reaction Rate

Science ◽  
1973 ◽  
Vol 182 (4119) ◽  
pp. 1344-1345 ◽  
Author(s):  
V. I. Goldanskii ◽  
M. D. Frank-Kamenetskii ◽  
I. M. Barkalov
Keyword(s):  
Low Temperature ◽  
Chemical Reaction ◽  
Reaction Rate ◽  
Temperature Limit ◽  
Chemical Reaction Rate

Low-temperature limit of the rate of propagation of chains in the hydrobromination of ethylene

1979 ◽  
Vol 76 ◽  
pp. 1013-1015 ◽  
Author(s):  
D.P. Kiryukhin ◽  
I.M. Barkalov ◽  
V.l. Goldanskii
Keyword(s):  
Low Temperature ◽  
Temperature Limit

scholarly journals Advances in Cryochemistry: Mechanisms, Reactions and Applications

Molecules ◽  
2021 ◽  
Vol 26 (3) ◽  
pp. 750
Author(s):  
Lu-Yan An ◽  
Zhen Dai ◽  
Bin Di ◽  
Li-Li Xu
Keyword(s):  
Low Temperature ◽  
Chemical Reactions ◽  
Common Sense ◽  
Reaction Rate ◽  
Concentration Effect ◽  
Biological Products ◽  
Freeze Concentration ◽  
New Strategy ◽  
The 1960S

It is counterintuitive that chemical reactions can be accelerated by freezing, but this amazing phenomenon was discovered as early as the 1960s. In frozen systems, the increase in reaction rate is caused by various mechanisms and the freeze concentration effect is the main reason for the observed acceleration. Some accelerated reactions have great application value in the chemistry synthesis and environmental fields; at the same time, certain reactions accelerated at low temperature during the storage of food, medicine, and biological products should cause concern. The study of reactions accelerated by freezing will overturn common sense and provide a new strategy for researchers in the chemistry field. In this review, we mainly introduce various mechanisms for accelerating reactions induced by freezing and summarize a variety of accelerated cryochemical reactions and their applications.

scholarly journals On apparent barrier-free reactions

2020 ◽  
Vol 3 (1) ◽  
pp. 3-8
Author(s):  
Maikel Ballester
Keyword(s):  
Low Temperature ◽  
Chemical Reactions ◽  
Rate Constant ◽  
Kinetic Models ◽  
Rate Coefficient ◽  
Minimum Energy ◽  
Temperature Limit ◽  
Rate Coefficients ◽  
Minimum Energy Path ◽  
Full Dimension

Rate coefficients of bi-molecular chemical reactions are fundamental for kinetic models. The rate coefficient dependence on temperature is commonly extracted from the analyses of the reaction minimum energy path. However, a full dimension study of the same reaction may suggest a different asymptotic low-temperature limit in the rate constant than the obtained from the energetic profile.

Transformation behavior of Ni–Mn–Ga in the low-temperature limit

2012 ◽  
Vol 24 (27) ◽  
pp. 276004 ◽  
Author(s):  
J I Pérez-Landazábal ◽  
V Recarte ◽  
V Sánchez-Alarcos ◽  
V A Chernenko ◽  
J M Barandiarán ◽  
...  
Keyword(s):  
Low Temperature ◽  
Temperature Limit ◽  
Transformation Behavior

Non-LTE Line Transfer with Diffusion of Excited Atoms

1977 ◽  
Vol 32 (2) ◽  
pp. 156-159
Author(s):  
D. F. Düchs ◽  
J. Oxenius
Keyword(s):  
Differential Equation ◽  
Low Temperature ◽  
Radiative Transfer ◽  
Spectral Line ◽  
Source Function ◽  
Homogeneous Medium ◽  
Classical Problem ◽  
Temperature Limit ◽  
Excited Atoms ◽  
Line Transfer

The classical problem of radiative transfer in a spectral line, due to two-level atoms, in a homogeneous medium is reconsidered. It is pointed out that the source function used up to now in the literature neglects the diffusion of the excited atoms. In many cases this assumption is not justified. In the low-temperature limit kT ≪ hv, the correct source function, allowing for diffusion of excited atoms, obeys an integro-differential equation

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