Radiation Chemistry Of Organic Compounds Research Articles

Methodology in the radiolysis of biochemical compounds with cyclotron beams at low flux densities

A modification of the standard beam-optics of the LBL 88-Inch Cyclotron now makes it practicable to use cyclotron radiations in the detailed study of the effects of linear energy transfer (LET) in the radiation chemistry of organic compounds in the solid state. Dosages and dose-rates are comparable to those employed in conventional γ-ray studies. The modification involves passing the focused beam through a pair of “beam-sweeping” electromagnets so that a circular target area up to 10 cm in diameter can be uniformly irradiated with beams in the nanoamp range. Yield data are given for the radiolysis of the Fricke dosimeter with beams of H +, H +2, Be +4, C +6 and Ne +10 at ∼10 MeV per nucleon. Preliminary data on the effects of LET in the radiolysis of solid glycine are reported.

A Review of the Radiation Chemistry of Single-Carbon Compounds and Some Reactions of the Hydrated Electron in Aqueous Solution

for understanding the radiation chemistry of aqueous organic systems. In this paper we shall attempt to explain some aspects of the radiation chemistry of single-carbon compounds by using the absolute rate constants and already established yields of intermediate species as a guide. We shall deal specifically with reactions of the hydrated electron, the H atom, and the hydroxyl radical with the components of irradiated water and with dissolved organic compounds. Our goal is to deduce the basic mechanisms occurring in simple organic compounds containing only carbon, hydrogen, and oxygen bonds. Later papers will treat the radiation chemistry of organic compounds of greater complexity. We shall deal with methane, methanol, formaldehyde, formic acid, carbon monoxide, and carbon dioxide. Finally we shall discuss some reactions of organic molecules with the hydrated electron, eq . SINGLE-CARBON COMPOUNDS

Phase Effects in the Radiation Chemistry of Organic Compounds which may arise from Long-Range Energy Transfer

WE have recently investigated the γ-ray-induced destruction of the solute (S = either I2, FeCl3 or DPPH) in dilute liquid and solid solutions in the organic solvents listed here. For all liquid solutions at 30° C. G (−S) is independent of solute concentration and dose and shows the expected dependence on solvent structure (Table 1). In contrast to this simple situation the corresponding solid solutions show the following two distinct types of radiation response: (1) Crystalline solutions in diethyl ether or dioxan and glassy solutions in phenetole or 2-methyl tetra-hydrofuran have G(−FeCl3) values which are independent of dose, temperature and solute concentration and are smaller than the values for the corresponding liquid solutions. (2)G(−S) for crystalline solutions of FeCl3 in the first four solvents in Table 1 and of iodine in diphenyl ether or phenetole2 is markedly dependent on concentration, increases with diminishing temperature of irradiation and may be very much larger than the value in the liquid phase. This behaviour is illustrated in Fig. 1.

Radiation chemistry of organic compounds (Swallow, A. J.)

Radiation chemistry of organic compounds (Swallow, A. J.)

Radiation chemistry of organic compounds. A. J. Swallow. pcrgamon press, New York, 1960. XIII + 380 pp. $15.00

Radiation chemistry of organic compounds. A. J. Swallow. pcrgamon press, New York, 1960. XIII + 380 pp. $15.00

Radiation Chemistry of Organic Compounds

Radiation Chemistry of Organic Compounds By Dr. A. J. Swallow. (International Series of Monographs on Radiation Effects in Materials, Vol. 2). Pp. xiii + 380. (London and New York: Pergamon Press, 1960.) 84s. net.

Radiation Chemistry of Organic Compounds. IV. Cyclohexane

The major products formed in the 800 kvp electron radiolysis of cyclohexane are hydrogen, cyclohexene, and dicyclohexyl. Minor amounts of products result from fragmentation and isomerization of the ring system. The initial yields are, G(C/sub 6/H/sub 10/) = 2.5 and G(dicpclohexyl) = 2.0 and were unchanged by irradiation either in 10 atmospheres of hydrogen or at liquid nitrogen temperature. In the presence of solutes, oxygen, iodine, and benzene, the cyclohenene yield decreased to a limiting value of G = O.T. The results are discussed in terms of a mechanism which involves the decomposition of excited cyclohexane molecules. The results show that of the excited molecules that decompose approximately 15% give products directly by an unspecified molecular process. (auth)

Radiation Chemistry of Organic Compounds. III. Branched Chain Alkanes

Radiation Chemistry of Organic Compounds. III. Branched Chain Alkanes

Radiation Chemistry of Organic Compounds. II. n-Hexane

Radiation Chemistry of Organic Compounds. II. n-Hexane

Radiation Chemistry of Organic Compounds. I. n-Alkane Liquids

Radiation Chemistry of Organic Compounds. I. n-Alkane Liquids

A Survey of the Radiation Chemistry of Organic Compounds

A Survey of the Radiation Chemistry of Organic Compounds