Carbon dioxide resonance energy

Sharma R D and Brau C A 1967 Near-resonant vibrational energy transfer in nitrogen carbon dioxide mixtures Phys. Rev. Lett. 19 1273-5... 

Resonance Energies of Carbon Dioxide, Alkyl Isocyanates, etc. 

The sensor for the measurement of high levels of CO2 in gas phase was developed, as well90. It was based on fluorescence resonance energy transfer between 0 long-lifetime ruthenium polypyridyl complex and the pH-active disazo dye Sudan III. The donor luminophore and the acceptor dye were both immobilized in a hydrophobic silica sol-gel/ethyl cellulose hybrid matrix. The sensor exhibited a fast and reversible response to carbon dioxide over a wide range of concentrations. 

Neurauter G, Klimant I, Wolfbeis OS (1999) Microsecond lifetime-based optical carbon dioxide sensor using luminescence resonance energy transfer. Anal Chim Acta 382 67-75... 

In the hands of Pauling this treatment has been successful in correlating many facts in terms of a number of possible structural i ormulae, and it has been widely developed by Wheland and many others. Sometimes the valence bond structures betv een which resonance is considered to take place are natural and plausible, such as the two Kekule forms of benzene on other occasions it is tiecessary to postulate less plausible structures of liigh energy such as the ionic forms of carbon dioxide see Long i ). The... 

The heat 6f formation of carbon dioxide is 336 9 kcals and since the energy of two G=0 bonds is 310 kcals it follows that 26 9 kcals, the resonance being between the two structures 0==G=0 and O —... 

For the diatomic molecules that were studied—nitrogen, oxygen, nitric oxide, and carbon monoxide—the concept of a Coulomb explosion appears to be relevant. The yield of atomic ions is high, 93% to 97%, and the ion kinetic energies of around 7 eV for +1 ions and about twice this value for -1-2 ions are consistent with the Coulomb repulsion model. For the polyatomic molecules the situation is different. The yield of atomic ions drops to 85% for carbon dioxide and to 74% for carbo i tetrafluoride. For excitation of a core to bound state resonance in nitrous oxide, involving the terminal nitrogen atom, the yield of atomie ions is only 63% (Murakami et al. 1986). These molecules do not simply explode following excitation of a core electron. 

The heat 6f formation of carbon dioxide is 336 9 kcals and since the energy of two C=0 bonds is 310 kcals it follows that E — 26 9 kcals, the resonance being between the two structures 0=C=0 and O —G==s=0+. By similar calculations using the energies of the C=0, G—O and O—H bonds, we find that for the group COOH, ZsE = 20 kcals and for the group COOC, EB = 22 kcals. A greater deviation from the additivity rule occurs in acetic anhydride... 

P.V. Kortunov, M. Siskin, L.S. Baugh, D.C. Calabro, In situ nuclear magnetic resonance mechanistic studies of carbon dioxide reactions with liquid amines in Non-aqueous systems evidence for the formation of carbamic acids and zwitterionic species. Energy Fuels 29 (9) (2015) 5940-5966. 

Figures 14-72 and 14-73 shows the valence hond (VB) theory descriptions of the carbon dioxide and benzene molecules. Each resonance structure corresponds to a Lewis structure of the molecule, and each has its own characteristic energy. The wave functions of the two molecules are a linear combination of the wave functions corresponding to the resonance structures. The number of resonance structures to be included to describe the molecule increases very rapidly with an increase in the number of atoms in the molecule. This is one of the drawbacks of VB theory (in its original form).

---