Authors: G.C. Stevens, R.M. Clarke, E.J. Hart The gamma-ray and electron pulse irradiation of aqueous methane and some ethane solutions is reported. The ab- sorption spectra of the CH3 and C2H5 free radicals have been measured in the wavelength range 210-270 nm. At 210 nm e(CH3) = 850 M-1 cm-1 and e(C2Hs) = 520 M-1 cm-1. The bimolecular recombination rate…
Authors: G.R. Dey Generation of NO-3 and NO-2 in aqueous phase within high ionizing radiation zone is normal phenomena. Their formation mechanisms, and controls still remain a challenge with reference to creation of corrosive environment. Nitrogen in such system relates mainly to air ingress, and from added nitrogen compounds, which are used to control pH and dissolved oxygen. Under radiation…
Authors: I.G. Draganić, S. Jovanić, V. Niketić, Z.D. Draganić, Oxygen-free aqueous solutions of CH3CN (0.1 M, pH 6) were ex- posed to gamma rays from a 60Co source,the mixture of non volatile radiolytic products was fractionated and the fractions were analysed. Succinic,maleic, fumaric, malonic andpyruvic acids were identified. Glycol aldehyde,glucose and probably ribose were observed in the hydrolysate of fractionated…
Authors: S. Fujita On the radiolysis of uridine and some other nucleosides in aqueous solution, a pH-dependent liberation of uracil or the corresponding base was found. e and HO-2 gave no freed bases, although many oxidizing radicals, including OH, Cl2, Br2, (CNS)2 and SO4, did cause the release of unaltered bases, depending on the pH of the solutions. The base…
Authors: J. H. Baxendale, R.D. Sedgwick The yields of hydrogen, formaldehyde, ethylene glycol, methane and carbon monoxide from the radiolysis of methanol vapour have been measured and also those of H2 and HD from CH3OD. These have been correlated with the ions observed in the mass spectra. Benzene decreases the yields of hydrogen and formaldehyde and the effect is attributed…
Authors: I. A. Taub, L. M. Dorfman The radiation chemistry of deaerated aqueous ethanol and deaerated liquid ethanol has been studied by the pulse radiolysis technique. The same transient absorption spectrum, showing a broad weak absorption at about 290 mU and stronger narrow peaks at 266, 257 and 247 mU, has been observed in both systems. It is concluded that…
Authors: T. W. Woodward, H. C. Sutton Aliphatic alcohols increase the yields of N2O observed in the radiolysis of NO solutions and are oxidized to the corresponding aldehyde in the process. The following reactions occur in addition to those previously suggested 1 for the NO radiolysis: OH+ROH → H2O+˙ROH ˙ROH+3NO → N2O+HNO2+R˙= 0(aldehyde) where R = Me, Et, i-Pr. https://doi.org/10.1039/TF9666200070
Authors: M. Simic, P. Neta, E. Hayon A detailed pulse radiolysis study of aqueous solutions of methanol, ethanol, isopropyl alcohol, n-, iso-, and t-butyl alcohols, neopentanol, and eyelohexanol has been carried out. Optical absorption spectra of some of the transients have been measured down to 210 nm. Similar spectra were obtained in liquid methanol, ethanol, and isopropyl alcohol. Absorption maxima…
Authors: R. L. Hudson Radiation processing of cometary, planetary, and interstellar ices has been investigated by irradiating mixtures of H2O and CO near 16 K with 0.8-MeV protons. IR spectroscopy and isotopic substitution showed that H and OH, from H2O, added to CO to form HCO, H2CO, HCOOH, and CH3OH. A values (integrated spectral absorbances) for HCOOH and HCO trapped…