Effect of gamma radiation on silica gel. II. Electron scavenging on surface of irradiated silica gel by nitrous oxide.:Electron Scavenging on Surface of Irradiated Silica Gel by Nitrous Oxide
スポンサーリンク
概要
- 論文の詳細を見る
Radiolysis of N<SUB>2</SUB>O adsorbed on silica gel degassed at 200, 450 and 600°C has been studied to investigate the behavior of electrons on the gel surface. The G-value of nitrogen as the major radiolytic product increases with an increase of N<SUB>2</SUB>O concentration adsorbed approaching a plateau value which depends on degassing temperature of the gel prior to irradiation. By the competitive electron scavenging of N<SUB>2</SUB>O with several electron scav-engers, such as CCl<SUB>4</SUB>, SF<SUB>6</SUB> and nitrobenzene, initial yield of electrons G(c), and relative rate constant for reaction of electrons with scavenger to that with N<SUB>2</SUB>O, ks/k<SUB>N<SUB>2</SUB>O</SUB>, have been obtained. The G(e-) is 3.8 and 2.0 for the gel degassed at 200 and 600°C respec-tively. In the former gel, the value of k<SUB>s</SUB>/k<SUB>N<SUB>2</SUB>O</SUB> is comparable with that in aqueous system, while in the latter, with that in non-polar hydrocarbon such as neopentane. The observed difference may be attributed to the presence of silanol groups and residual water which facilitate some form of hydration of electrons on the gel degassed at low temperature. Despite of the complexity of the heterogeneous system, Hammett's rela-tionship is observed among the reactions of electrons with monosubstitutcd derivatives of benzene, providing the reaction constant p as 2.8.
- 一般社団法人 日本原子力学会の論文
著者
-
Sawai Takeshi
Tokyo Metropolitan Isotope Research Center
-
KONDO Masaharu
Department of Chemistry, Faculty of Science, Tokyo Metropolitan University
-
OGURA Hajime
Department of Chemistry, Faculty of Science, Tokyo Metropolitan University
-
NAKAZATO Chiyoko
Department of Chemistry, Faculty of Science, Tokyo Metropolitan University
-
SAWAI Teruko
Tokyo Metropolitan Isotope Research Center
-
HINATA Masafumi
Department of Chemistry, Faculty of Science, Tokyo Metropolitan University
関連論文
- Efficient Peroxide Decoloration of C.I. Acid Orange 7 Catalyzed by Manganese Mesoporphyrin Dimer Derivatives in Micellar Solutions
- Sphenoid Sinusitis Associated with Meningitis, Visual Disturbances and Total Ophthalmoplegia
- A molecular orbital study of the electrophilicity of hydroxyl radical in hydrogen abstraction reaction.
- A toxin released from variant stratins of Propionibacterium acnes isolated from patients with kawasaki disease.
- Effect of gamma radiation on silica gel. II. Electron scavenging on surface of irradiated silica gel by nitrous oxide.:Electron Scavenging on Surface of Irradiated Silica Gel by Nitrous Oxide
- The kinetics of the radiation-induced chain dechlorination of hexachloroethane in alcohols.
- Effect of Gamma Radiation on Silica Gel
- Chain Dechlorination of Organic Chlorinated Compounds in Alcohol Solutions by 60Co γ-Rays, (I):Pentachlorobenzene in Various Alkaline Alcohol Solutions
- The Radiation-induced Dehalogenation of Dichloromethane and Dibromomethane in Methanol Solutions
- The Trapping Efficiency for Electrons in Polar Glasses at 77°K
- Hydrogen formation from water adsorbed on zeolite during gamma-irradiation.
- Radiolysis of methanol adsorbed on zeolite.
- Reactivity of electrons produced in gamma-irradiated zeolite toward several electron scavengers.
- Enhanced growth of mycobacteria by culture filtrate of Gemella haemolysans.
- Effect of gamma radiation on silica gel. III. Dependence of hydrogen adsorbed and color center formation on aluminum contents.:Dependence of Hydrogen Adsorbed and Color Center Formation on Aluminum Contents
- The effect of .GAMMA.-irradiation on the biodegradability of landfill leachate.
- A molecular orbital study on the partial reactivity of hydrogen of various amino acids in the abstraction reaction by hydroxyl radical.