Vibrational Energy Transfer in Carbon Monoxide

The role of V–V processes in vibrationally excited CO systems in the longitudinal and transverse flow chemical lasers is studied. Initial vibrational energy distributions of CO formed by the O + CS reaction are deduced from chemiluminescent data using calculated values of the vibration energy exchange probabilities. The time evolution of the population distributions is then obtained by computer simulation. The results are compared with experimental measurements. The effects of excess oxygen and of "cold" CO on the population distributions are also discussed.

Download Full-text

Evolution of the CO Vibrational Energy Distribution in a Transverse Flow Laser

Canadian Journal of Physics ◽

10.1139/p73-135 ◽

1973 ◽

Vol 51 (9) ◽

pp. 1026-1029 ◽

Cited By ~ 2

Author(s):

P. H. Dawson

Keyword(s):

Experimental Data ◽

Energy Distribution ◽

Population Inversion ◽

Energy Exchange ◽

Vibrational Energy ◽

Transverse Flow ◽

Vibrational Energy Distribution ◽

Range Force ◽

Comparison With Experimental Data

Values of the probabilities of vibrational energy exchange among CO molecules are calculated using the long-range force theory and provide the basis for a computer simulation of CO vibrational energy distribution in a transverse flow chemical laser. A comparison with experimental data demonstrates the importance of the very rapid redistribution of energy among high-lying levels due to CO†–CO† interactions and of the role of the chemical by-product OCS in enhancing the population inversion in levels ν = 6 to 10.

Download Full-text

VIBRATIONAL DISEQUILIBRIUM IN REACTIONS BETWEEN ATOMS AND MOLECULES

Canadian Journal of Chemistry ◽

10.1139/v60-242 ◽

1960 ◽

Vol 38 (10) ◽

pp. 1769-1779 ◽

Cited By ~ 54

Author(s):

N. Basco ◽

R. G. W. Norrish

Keyword(s):

Hydroxyl Radicals ◽

Flash Photolysis ◽

Vibrational Energy ◽

Electronic Energy ◽

Reaction Products ◽

Energy Distributions ◽

Vibrationally Excited ◽

Atoms And Molecules ◽

New Class ◽

Excited Oxygen

Observations on the production of vibrationally excited oxygen molecules in the flash photolysis of nitrogen peroxide and of ozone have extended previous work on these systems. In the case of nitrogen peroxide it has been shown that oxygen molecules possessing the entire exothermicity of the reaction in the form of vibrational energy are produced. A new class of reactions is reported in which vibrationally excited hydroxyl radicals are produced under isothermal conditions by the reaction O(1D) + RH → OH* + R, in which the energy for excitation is contributed by the electronic energy of the oxygen atom.These and other cases of non-equilibrated energy distributions in reaction products and theories accounting for this phenomenon are reviewed.

Download Full-text

Simply supported FPEDs connected by springs for broadband energy harvesting

International Journal of Applied Electromagnetics and Mechanics ◽

10.3233/jae-209323 ◽

2020 ◽

Vol 64 (1-4) ◽

pp. 201-210

Author(s):

Yoshikazu Tanaka ◽

Satoru Odake ◽

Jun Miyake ◽

Hidemi Mutsuda ◽

Atanas A. Popov ◽

...

Keyword(s):

Energy Harvesting ◽

Evaluation Method ◽

Energy Harvester ◽

Vibrational Energy ◽

Functional Materials ◽

Vibration Energy ◽

Theoretical Evaluation ◽

Vibration Energy Harvester ◽

Polyvinylidene Difluoride ◽

Simply Supported

Energy harvesting methods that use functional materials have attracted interest because they can take advantage of an abundant but underutilized energy source. Most vibration energy harvester designs operate most effectively around their resonant frequency. However, in practice, the frequency band for ambient vibrational energy is typically broad. The development of technologies for broadband energy harvesting is therefore desirable. The authors previously proposed an energy harvester, called a flexible piezoelectric device (FPED), that consists of a piezoelectric film (polyvinylidene difluoride) and a soft material, such as silicon rubber or polyethylene terephthalate. The authors also proposed a system based on FPEDs for broadband energy harvesting. The system consisted of cantilevered FPEDs, with each FPED connected via a spring. Simply supported FPEDs also have potential for broadband energy harvesting, and here, a theoretical evaluation method is proposed for such a system. Experiments are conducted to validate the derived model.

Download Full-text

Hydrogen fluoride vibrational energy distributions for the reactions of fluorine atoms with cyclanes

International Journal of Chemical Kinetics ◽

10.1002/kin.550070310 ◽

1975 ◽

Vol 7 (3) ◽

pp. 433-441 ◽

Cited By ~ 10

Author(s):

John H. Parker

Keyword(s):

Hydrogen Fluoride ◽

Vibrational Energy ◽

Energy Distributions

Download Full-text

Ionic liquids: Solvation ability and polarity

Pure and Applied Chemistry ◽

10.1351/pac-con-08-09-08 ◽

2009 ◽

Vol 81 (4) ◽

pp. 767-776 ◽

Cited By ~ 59

Author(s):

Cinzia Chiappe ◽

Marco Malvaldi ◽

Christian Silvio Pomelli

Keyword(s):

Ionic Liquids ◽

Kinetic Data ◽

Classification Criteria ◽

Experimental Measurements ◽

Molecular Liquids ◽

The Poor ◽

Poor Understanding ◽

The Many ◽

Molecular Solvents

The role of ionic liquids (ILs) as solvents in chemistry is limited by the poor understanding of the solvation phenomenon in these media. The usual classification criteria used for molecular solvents through various experimental measurements fail to insert ILs into a univocal classification for ILs. Here, we first discuss the unsuitability of the usual interpretative scheme for molecular liquids and elucidate schematically the mechanism of solvation in ILs, pointing out the peculiarities that differentiate them with respect to molecular liquids. Second, we focus on reactivity and reaction kinetics in ILs, underlining the many problems that the complexity of these media reflects on the interpretation of kinetic data and some possible approaches to understand qualitatively the (often not trivial) kinetic problems for reactions performed in ILs.

Download Full-text