Doublet electronic states of the benzyl radical.
Doublet electronic states of benzyl radical, discussing configuration-interaction calculations and transition predictions
Phillips, D. H.↗
SEARCH · Engineering Papers
Results for “RADICALS”
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
Benzene anion radical - Removal of the orbital degeneracy at 4.2 deg K.
Benzene anion radical in solid solution ESR spectrum, noting removal of orbital degeneracy at 4.2 degrees K
Brown, I. M.↗
Free radicals induced in enzymes by electrons and heavy ions.
Free radicals produced in ribonuclease, lysozyme and trypsin during exposure in vacuum and various temperatures to electron and heavy ion irradiation
Henriksen, T.↗
Free radical destruction by gamma-irradiation at 77 K.
Free radicals destruction rates by gamma irradiation at 77 K measured as first order function of dosage, using electron spin resonance spectroscopy
Horan, P. K.↗
Radical stabilities in nitrogen containing heterocyclic systems
Spin stability calculations of radicals in nitrogen containing heterocyclic compounds
Evleth, E. M.↗
Activation energies for reactions of hydroxyl radicals with hydrogen and carbon monoxide
Time of flight mass spectrometric technique for measuring rate constants of hydroxyl radical reactions with hydrogen and carbon monoxide
Belles, F. E.↗
Free radical destruction by gamma-irradiation at 77 deg K
Free radical destruction by gamma irradiation in organic solids at low temperature measured by electron spin resonance spectroscopy, noting dosage relationship
Horan, P. K.↗
Ratio of disproportionation to combination of N2H3 radicals
Disproportionation to combination ratio of hydrazyl radicals generated in absence of hydrazine direct decomposition
Stief, L. J.↗
Radiation-induced radicals in thymine - ESR studies of single crystals
Radicals induced in thymine monohydrate single crystals by ionizing radiation
Henriksen, T.↗
Stabilities of nitrogen containing heterocyclic radicals and geometrical influences on nonradiative processes in organic molecules Progress report, Jul. 1969 - Jul. 1970
Research in existence and electronic structure of heterocyclic radicals
Evleth, E. M.↗
An initial search for the interstellar formyl radical, HCO, and for HC/13/O/plus/
Interstellar formyl radical and carbon 13 formyl ion search in galactic radio sources
Jefferts, K. B.↗
Computed and observed cyanide-radical spectra of three N stars in the infrared
N stars Y CVn, RY Dra and 19 Psc IR synthetic cyanide radical spectrum analysis, determining C 12/C 13 ratio
Fay, T. D., Jr.↗
Perturbation analysis and constants for the red system of the cyanide radical
CN radical red system molecular constants, considering degenerate perturbation effects in shifts between electronic states
Fay, T.↗
Formation of free radicals during mechanical degradation of elastomers.
Solithane 113 (an amorphous polyurethane elastomer) was prepared by curing equal proportions of castor oil and trifunctional isocyanate for 6 hr 45 min at 170 F. The sample material was mechanically degraded by grinding below and above its glass transition point at liquid nitrogen and room temperatures. The EPR spectra of ground samples were recorded and the number of free radicals were determined by a computer double-integration of the recorded spectra and by a comparison of the values with those of a standard material. Curves of EPR spectra suggest that different molecular mechanisms may be active in degradation of this material below and above its glass transition temperature.
Devries, K. L.↗
Quenching of the B /super 2/Sigma-plus state of the CN radical.
The quenching of the B (super 2)Sigma-plus fluorescence from the CN radical has been studied as a function of the relative velocity of the quenching collision and the total pressure in the fluorescence cell. The rate constant for the quenching of the CN fragment by ICN vapor was found to be directly proportional to the relative velocity of the quenching collision. Electronic quenching was also observed for methane, diatomic hydrogen, Kr, and Ar.
Jackson, W. M.↗
Are HO radicals produced in the reaction of O(3P) with 1-C4H8 ?
The reaction of O(3P) with 1-C4H8 was examined in the presence of CO which scavenges HO radicals to produce CO2. From the CO2 quantum yield, an upper limit to the efficiency of HO production in the reaction of O(3P) with 1-C4H8 was found to be 0.020 at both 298 and 473 K.
Luria, M.↗
Rate constants for the reactions of hydroxyl and hydroperoxyl radicals with ozone.
Chain decomposition of ozone by hydroxyl and hydroperoxyl radicals has been observed. The rate constant at 300 K for OH + O3 yielding HO2 + O2 is eight times ten to the -14th power cubic centimeters per second. The rate constant for HO2 + O3 yielding OH + 2O2 is three times ten to the -15th power cubic centimeters per second. These results have implications concerning stratospheric ozone.
Demore, W. B.↗
Stabilities of nitrogen containing heterocyclic radicals and geometrical influences on non-radiative processes in organic molecules
Theoretical and experimental work on generating radicals by removal of a hydrogen atom from pyrrole, imidazole, indole, and carbazole is reported. Photophysical studies on indolizine and related aza-derivatives show that materials having large S2-S1 energy gaps might exhibit upper state fluorescence. Photodecomposition quantum yields of a series of sterically hindered p-aminobenzene diazonium cations in water were found structurally and wavelength dependent and unquenched in aqueous sodium bromide solutions. Photodecomposition of diazonium materials did not produce a metastable species with a longer lifetime than 1 msec.
Evleth, E. M.↗