| Photolysis of Ketones Reactions of Alkyl and Perfluoroalkyl Radicals. |
AUG 1971 |
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| Authors:
Alvin S. Gordon; Charles I. Barta; R. H. Knipe; J. H. Johnson; NAVAL WEAPONS CENTER CHINA LAKE CA
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 | Five reprints of the authors' describe free radical reactions: the gas-phase thermal reaction between perfluoroacetone and propene in the temperature range from 448 to 687K. The photolysis of 3-pentanone-2,2,4,4-d4, which has been studied over the temperature range from 20 to 407C, was found to provide a convenient source of partially deuterated ethyl radicals for studying the kinetics of ethyl radical reactions with molecules R-H. The effects of ethene and ethane ... |
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| DETERMINATION OF THE DEGREE OF IONIZATION OF GAS ATOMS AS A FUNCTION OF X-RAY ENERGY. |
MAY 1968 |
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| Authors:
W. D. Whitehead Jr.; Hugh S. Landes; VIRGINIA UNIV CHARLOTTESVILLE DIV OF ELECTRICAL ENGINEERING
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| Photo-ionization of gases may result in many ions with high charge states if the initial event is the removal of an inner shell electron. This may be followed by radiationless or Auger transitions with the result that a number of electrons are removed from the atom. The relative abundances of the various charge states for Krypton and Xenon were measured as a function of maximum x-ray energy. Measurements were made ... |
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| THE ROLE OF NITRIC OXIDE IN PHOTOCHEMISTRY. |
OCT 1966 |
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| Authors:
Julian Heicklen; Norman Cohen; AEROSPACE CORP EL SEGUNDO CA LABS DIV
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| The gas phase chemistry of nitric oxide is reviewed for reactions of importance below about 300 C. Included are reactions of vibrationally and electronically excited NO and the reactions of NO with stable molecules, electronically excited molecules, atoms, ions, and radicals. The fate of nitroso compounds is also discussed. (Author) |
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| CONDUCTIVITY CHANGES PRODUCED IN ICE BY OPTICAL IRRADIATION .8 TO 2.7. |
AUG 1966 |
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| Authors:
P. R. Camp; D. L. Spears; COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER N H
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| A series of experiments attempt to produce orientational defects and ions by optical injection. The basic experiment was one on transient photo-conduction produced by an intense light pulse. The effects of intensity and wavelength of the incident light, temperature of the sample and area of illumination of the sample were studied. It was concluded that neither orientational defects nor ion pairs were produced in appreciable quantity by the light but ... |
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| REACTION OF NO(A(2) SIGMA(+)) WITH CO2. |
JUN 1966 |
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| Authors:
Norman Cohen; Julian Heicklen; AEROSPACE CORP EL SEGUNDO CA LAB OPERATIONS
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| In the presence of CO2, NO(A2 sigma(+)) was produced by irradiation of NO-CO2 mixtures with a cadmium arc. The products monitored with N2, whose yield dropped as the (CO2)/(NO) ratio was enhanced, and CO, whose yield rose with the (CO2)/(NO) ratio to a constant upper limit. Product formation was unaffected by temperature changes (23 to 300 C) or by the addition of xenon or NO2. Carbon dioxide is about 3.4 ... |
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| PHOTOCHEMICAL PROCESSES IN EXPLOSION OF OZONE. |
JUN 1966 |
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| Authors:
A. L. Berlad; DEFENSE RESEARCH CORP SANTA BARBARA CA
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| Examination is made of chemical kinetic schemes proposed for the thermal and photoinitiated decomposition rates of ozone. A kinetic scheme capable of representing both the observed ultraviolet quantum yields in pure ozone and the thermal decomposition rates in O3-O2 mixtures is selected. The scheme is intended for calculation of temperature-composition histories during photoinitiated ozone explosions. Such calculations are now in progress. Preliminary results indicate a close correspondence between the calculated ... |
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| INVESTIGATION OF THE PHOTOPOLYMERIZATION PROCESS. |
11 JUN 1965 |
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| Authors:
E. Cerwonka; GENERAL ANILINE AND FILM CORP BINGHAMTON NY
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| The induction period associated with the polymerization of A-5 was measured for redox systems consisting of copper sulfate coupled with several sulfinates, thiosulfinates and a sulfoxylate. Sodium benzene sulfinate was more effective than other aromatic sulfinates. Introduction of a nitro group into the aromatic ring of sodium benzene sulfinate eliminated the reducing property associated with the unsubstituted sulfinic acid. On an equimolar basis, sodium benzene thiosulfonate was found to initiate ... |
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| INVESTIGATION OF GAS IONIZATION PHENOMENON AT OPTICAL AND IR FREQUENCIES. |
JAN 1965 |
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| Authors:
L. C. VanAllen; A. V. Phelps; R. W. Waynant; WESTINGHOUSE DEFENSE AND SPACE CENTER BALTIMORE MD
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| Results of the first half of the program are summarized and the status at that point is given. The experimental laser system is described and the calibration and monitoring procedures discussed. Breakdown time statistics and charge measurements obtained during this time are presented. The theoretical study results obtained to date in the areas of the non-linear ionization initiation mechanisms and the extension of the microwave break-down theory are discussed. A ... |
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| TRIPLET METHYLENE FORMATION ON PHOTOLYSIS OF KETENE AND DIAZOMETHANE, |
1965 |
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| Authors:
B. S. Rabinovitch; K. W. Watkins; D. F. Ring; WASHINGTON UNIV SEATTLE DEPT OF CHEMISTRY
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| Results are presented which reconcile a recently-discovered anomaly between gas-phase and liquid-phase behavior of diazomethane-methylene radical systems, and which contrast the behavior of ketene and diazomethane systems. (Author) |
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| PHOTODEGRADATION OF HIGH POLYMERS IN SOLUTION. PART I. SOLVENT EFFECTS IN THE PHOTOLYSIS OF POLY (ALPHA-METHYLSTYRENE). |
25 AUG 1964 |
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| Authors:
R. B. Fox; T. R. Price; NAVAL RESEARCH LAB WASHINGTON D C
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| The photodegradation of poly (alpha-methylstyrene) was investigated in the presence and absence of air in a series of solvents under irradiation by a low pressure mercury lamp at about 25C. Changes in the intrinsic viscosities of the solutions as well as spectral changes are used to follow the course of the degradation. Under most conditions, random scission is the major degradation reaction; no crosslinking is observed. Empirical comparisons of the ... |
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| STUDY OF THE PHOTOCATALYZED DECOMPOSITION OF WATER AND OF THE MECHANISMS OF INTRAMOLECULAR ELECTRON TRANSFER IN ORGANIC COMPOUNDS. |
14 MAY 1964 |
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| Authors:
Lawrence J. Heidt; MASSACHUSETTS INST OF TECH CAMBRIDGE
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| Gross and net quantum yield measurements were made for the photochemical conversion by light of 2537 A of up to 1.4% of the ferrous to ferric sulfate and of the accompanying production of gaseous H2 in aqueous H2SO4 at 25C. The data support the hypothesis that in solution 2M or less in dilute H2SO4, FeSO4 exists mostly as ion pairs which in 6.0 M H2SO4 are partly replaced by contact ... |
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| MONOENERGETIC PHOTOLYTIC REACTIONS. |
08 NOV 1963 |
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| Authors:
E. W. Schlag; R. V. Serauskas; R. Campbell; NORTHWESTERN UNIV EVANSTON ILL
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| THERMOCHROMISM AND PHOTOTROPISM: AN ANNOTATED BIBLIOGRAPHY, |
APR 1963 |
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| Authors:
Helen M. Abbott; LOCKHEED MISSILES AND SPACE CO INC SUNNYVALE CA
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| This annotated bibliography contains 151 selected references to materials that exhibit the phenomena of thermochromism (reversible color change dependent on temperature) and phototropism (color change caused by exposure to light sources). Material exhibiting this phenomena is of interest in the preparation of glass or transparent coattings that can darken when exposed to radiation sources and return to the original color when the light source is removed. Thermochromic coatings whose color ... |
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| A Recording Photometer and Accompanying Apparatus for Use in Measurement of Reaction Kinetics. |
01 FEB 1950 |
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| Authors:
Harold Kwart; Chiahchih Yang; HARVARD UNIV CAMBRIDGE MASS
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| An apparatus is described in this report which affords automatic recording of fractional light transmission and hence of reagent concentrations during reaction kinetic studies. The reagent concentrations are followed by means of double beam spectrophotometry. The instrument is provided with apparatus for initiating photochemical chain reactions and affords conditions for rotating-sector measurements during spectrophotometric observations. Data are presented on the performance, sensitivity and precision of measurement. (Author) |
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(PHOTOCHEMICAL REACTIONS
