The air glow reaction NO + O + (M) → NO*2 + (M) at low pressures

Becker, K. H.; Groth, W.; Thran, D.

doi:10.1016/0009-2614(70)85232-0

Cited by 21 publications

(5 citation statements)

References 14 publications

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“…O 2 or Ar. As is shown [31,32], the NO 2 chemiluminescence spectrum has a maximum around 580-600 nm and strongly decreases at a lower wavelength of 400 nm. This continuum has a different wavelength dependence in comparison with the observed RF discharge emission but still can contribute to discharge irradiation above 400 nm.…”

Section: Chemiluminescence Continuum Of Nomentioning

confidence: 73%

Characterization of a planar 8 mm atmospheric pressure wide radiofrequency plasma source by spectroscopy techniques

Nikiforov

Ionita

Dinescu

et al. 2015

Plasma Phys. Control. Fusion

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Classification numbers: PACS: 52.70.Kz, 52.80.TnAtmospheric pressure planar RF 13.56 MHz discharge in Ar gas generated in long gap is investigated. The discharge operation with and without dielectric barrier on the electrodes is studied as a function of the applied power and gas flow. The source afterglow is characterized and analyzed for possible large scale biomedical applications where low gas temperature is required. The discharge is studied by relative and absolute emission spectroscopy. The gas temperature as low as 330±50 K is determined from rotationalvibrational band of OH emission. The absolute value of the discharge continuum irradiation is used to determine the electron density and the electron temperature. The electron-atom and electron-ion contributions to the Bremsstrahlung radiation are calculated and compared with measured spectra. The electron density of 1.91×10 20 m -3 and electron temperature of 1.750.25 eV are measured in the discharge without dielectric barrier. It is found that presence of the dielectric has negligible effect on electron temperature whereas electron number density is almost 6 times lower in the discharge with dielectric barrier.

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Section: Chemiluminescence Continuum Of Nomentioning

confidence: 73%

Characterization of a planar 8 mm atmospheric pressure wide radiofrequency plasma source by spectroscopy techniques

Nikiforov

Ionita

Dinescu

et al. 2015

Plasma Phys. Control. Fusion

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“…In 1669, he obtained from urine a white material that glowed in the dark: it was the white allotrope of phosphorus. Contrary to the Bologna stone, however, the luminescence of phosphorus is due to an oxidation reaction and is thus a true chemiluminescence. , In 1867, Anders Ångström, renowned Swedish physicist, while measuring the spectrum of the aurora borealis, also identified a faint light emission coming from the whole sky, a phenomenon later known as airglow and partly due to chemiluminescent reactions in the upper atmosphere. − The first report of chemiluminescence in a synthetic organic compound is due to the Polish chemist Bronisław Radziszewski, who discovered a continuous emission of light when lophine (2,4,5-triphenylimidazole) is mixed with a strong base in the presence of air …”

Section: Introductionmentioning

confidence: 99%

Chemi- and Bioluminescence of Cyclic Peroxides

et al. 2018

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Bioluminescence is a phenomenon that has fascinated mankind for centuries. Today the phenomenon and its sibling, chemiluminescence, have impacted society with a number of useful applications in fields like analytical chemistry and medicine, just to mention two. In this review, a molecular-orbital perspective is adopted to explain the chemistry behind chemiexcitation in both chemi- and bioluminescence. First, the uncatalyzed thermal dissociation of 1,2-dioxetane is presented and analyzed to explain, for example, the preference for triplet excited product states and increased yield with larger nonreactive substituents. The catalyzed fragmentation reaction and related details are then exemplified with substituted 1,2-dioxetanone species. In particular, the preference for singlet excited product states in that case is explained. The review also examines the diversity of specific solutions both in Nature and in artificial systems and the difficulties in identifying the emitting species and unraveling the color modulation process. The related subject of excited-state chemistry without light absorption is finally discussed. The content of this review should be an inspiration to human design of new molecular systems expressing unique light-emitting properties. An appendix describing the state-of-the-art experimental and theoretical methods used to study the phenomena serves as a complement.

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“…Of the order of 50% dissociation of C1, and Br, by a microwave discharge over the pressure range 15-1000 Pa can be achieved Stedman 1968a, Clyne et al 1972a), but dissociation of 0, and N, is much less efficient, a slight impurity being required for optimum dissociation, about 0.5-1% for N, (Campbell and Thrush 1967a). At pressures below 100Pa, Brown (1970) found the condensed discharge to produce more N atoms than a microwave discharge and the former discharge has likewise been preferred for studies of the N, and air afterglows in the pressure range 0.03-50 Pa (Becker et al 1970(Becker et al , 1972a. Microwave discharges also become less efficient at pressures much above 1 kPa and Noxon (1962) used an ozonizer discharge to study the nitrogen afterglow at pressures up to one atmosphere.…”

Section: The Dischargementioning

confidence: 99%

“…The glow intensity is measured at (E), the Wood's horn light trap (F) preventing stray light from the discharge region from reaching the observation region. Appropriate heating or cooling of the flow tube allows the temperature dependence of the afterglow intensity to be studied ; for weak glows, the observation region can be enlarged into a cylindrical or spherical observation vessel (Young and Sharpless 1962a, Brown 1970, Becker et al 1970.…”

Section: Experimental Procedures 21 Introductionmentioning

confidence: 99%

Afterglows

Golde

Thrush

1973

Rep. Prog. Phys.

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T h e relatively long-lived afterglows which are observed downstream from electric discharges through flowing gases are due to emission by electronically excited molecules formed by the recombination of free atoms produced in the discharge. Most afterglows arise by the recombination of atoms in their electronic ground states (eg N + N, N + 0 , 0 + 0, S + S, C1+ C1, etc) or by their combination with diatomic molecules, as in the air afterglow from 0 + NO or the carbon dioxide afterglow from 0 + CO. Two mechanisms obtain: two-body combination which is the inverse of predissociation in molecular spectra, and combination into an excited electronic state in the presence of a third body. The three-body process normally predominates and often gives high yields of emitting states ; radiationless processes have considerable importance since the emitting states do not normally correlate with the atomic states from which they are formed. I n the inert gas afterglows, the emitting state arises by the combination of a metastable excited atom with a ground state atom. I n this field, there is generally good agreement between theory and experiment, and the study of afterglows can provide much information about the behaviour of excited states of molecules.

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The air glow reaction NO + O + (M) → NO*2 + (M) at low pressures

Cited by 21 publications

References 14 publications

Characterization of a planar 8 mm atmospheric pressure wide radiofrequency plasma source by spectroscopy techniques

Characterization of a planar 8 mm atmospheric pressure wide radiofrequency plasma source by spectroscopy techniques

Chemi- and Bioluminescence of Cyclic Peroxides

Afterglows

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