Electron spin resonance detection of radicals and electrons condensed from water vapor after irradiation with 1 MeV helium ions

Seddon, W. A.; Smith, D. R.; Bindner, P.E.

doi:10.1139/v68-290

Cited by 5 publications

(3 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…can occur (2,21) and subsequent condensed phase radical reactions of N and 0 are expected in part to give N, and 0,. Clearly the different physical circumstances between the two kinds of irradiation (10,12) can affect the relative ratio and nature of the species finally observed. This is seen in the formation of NO, and the very low concentration of NO, observed from the crossed beam experiment.…”

Section: Reaction Mechanismsmentioning

confidence: 99%

“…Such samples were irradiated in a 60Co Gammacell 220 to a total dose of about 1.4 Mrads. The technique for the "crossed beam" experiments has been described previously (9)(10)(11).…”

Section: Introductionmentioning

confidence: 99%

“…Figure shows a wide scan first method trapped electrons are observed in neutral derivative spectrum obtained from 14N20. ice at 77 "K (10,(12)(13)(14).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Electron spin resonance studies of irradiated nitrous oxide

Smith¹,

Seddon²

1970

Can. J. Chem.

Self Cite

View full text Add to dashboard Cite

The y-radiolysis of N 2 0 at 77 O K , or vapor phase irradiation with 1 MeV He+ ions followed by condensation at 77 OK, results in the formation and trapping of at least 4 paramagnetic species. Using isotopically labelled N 2 0 these are identified as N 2 0 + , NO,, NO3, and N. The latter assignment is reasonable on spectroscopic grounds but since this species arises exclusively from the central nitrogen of N 2 0 it is difficult to describe its formation from established chemical reactions. The addition of H,O to the vapor phase experiments resulted in the trapping of 0 -, while the addition of tetranitromethane or NO indicated the existence of 0,-and 0 atoms, respectively. Possible reaction mechanisms are indicated.

show abstract

Section: Reaction Mechanismsmentioning

confidence: 99%

“…Such samples were irradiated in a 60Co Gammacell 220 to a total dose of about 1.4 Mrads. The technique for the "crossed beam" experiments has been described previously (9)(10)(11).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Electron spin resonance studies of irradiated nitrous oxide

Smith¹,

Seddon²

1970

Can. J. Chem.

Self Cite

View full text Add to dashboard Cite

show abstract

Solvatisierte und stabilisierte Elektronen bei strahlenchemischen Prozessen

Eiben

1970

Angewandte Chemie

View full text Add to dashboard Cite

Gegenüber den in Metall‐Ammoniak‐Lösungen existierenden solvatisierten Elektronen sind in Wasser gelöste Elektronen außerordentlich instabil und deshalb lange Zeit unbeachtet geblieben. Ihre Entdeckung bei der Radiolyse von Wasser hat einen Anstoß zur Untersuchung der Chemie dieses einfachsten Radikals gegeben. Die strahlenchemische Erzeugung solvatisierter Elektronen hat sich als eine besonders geeignete Methode erwiesen, um ihre zum Teil diffusionskontrolliert ablaufenden Reduktionsreaktionen mit vielen Partnern qualitativ und quantitativ zu erforschen. In einigen Fällen ist es gelungen, die dabei entstehenden kurzlebigen Reaktionsprodukte (Radikalanionen) optisch und ESR‐spektroskopisch zu identifizieren. Die Ähnlichkeit der physikalischen und chemischen Eigenschaften von in Lösung solvatisierten und in fester Phase stabilisierten Elektronen zwingt zu der Schlußfolgerung, daß beide Spezies identisch sind.

show abstract

Solvated and Stabilized Electrons in Radiation‐Chemical Processes

Eiben

1970

Angew. Chem. Int. Ed. Engl.

View full text Add to dashboard Cite

ConclusionsMethylation analyses of polysaccharidea from wood [35,361, fungi [30,31,37-401, lichens [411, and bacteria 13*.34,421 have recently been performed in the authors' laboratory using the Hakomori procedure for methylation and GLC-mass spectrometry for the qualitative and quantitative analysis of the methylated sugars. This technique has the following advantages:1. It is more accurate and sensitive than previous procedures. It is thus possible to identify and determine the relative proportions of minor components, which may be structurally significant. The electrons solvated in metal-ammonia solutions are relatively stable; by contrast, hydrated electrons are very unstable and have been discovered only recently during radiolysis of water. They can be regarded as the simplest radicals, Radiation chemical production of solvated electrons has proved to be a particularly elegant method for the qualitative and quantitative investigation of the reactions between these electrons and numerous compounds, whose rates are partly controlled by diffusion. It has been possible in some cases to identgy optically and ESR-spectroscopically the resulting short-lived products (radical-anions). The similarity between the physical and chemical properties of electrons solvated in solutions and those of electrons stabilized in the solid phasesuggests that the two species are identical. . tionsC31, known for the past hundred years o r so. Several indirect proofs for the existence of hydrated electrons were published in the following yearsC4-71. The first direct proof was obtained in 1962 when a n intense blue color was observed after the irradiation of glasses formed by NaOH solutions[8,91, and whenshortly [4] E. Hayon and J .

show abstract

Electron spin resonance detection of radicals and electrons condensed from water vapor after irradiation with 1 MeV helium ions

Cited by 5 publications

References 15 publications

Electron spin resonance studies of irradiated nitrous oxide

Electron spin resonance studies of irradiated nitrous oxide

Solvatisierte und stabilisierte Elektronen bei strahlenchemischen Prozessen

Solvated and Stabilized Electrons in Radiation‐Chemical Processes

Contact Info

Product

Resources

About