Radiation chemistry of aqueous solutions of dicyandiamide

Oxygen-free aqueous solutions of dicyandiamide, DCDA, were exposed to /sup 60/Co ..gamma.. rays or a pulsed 10-MeV electron beam. Fast kinetic spectrophotometry was used for the study of free-radical intermediates, and computer simulation of the reaction mechanism for evaluation of experimental data...

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Veröffentlicht in:	J. Phys. Chem.; (United States) 1979-01, Vol.83 (2), p.220-224
Hauptverfasser:	Draganic, Z. D, Draganic, I. G, Sehested, K
Format:	Artikel
Sprache:	eng
Schlagworte:	400600 - Radiation Chemistry ABSORPTION SPECTRA ANIONS AQUEOUS SOLUTIONS BEAMS CARBONIC ACID DERIVATIVES CHARGED PARTICLES CHEMICAL RADIATION EFFECTS CHEMICAL REACTION KINETICS CHEMICAL REACTIONS CHEMISTRY CYANAMIDES DATA DATA FORMS DECOMPOSITION DISPERSIONS ELECTROMAGNETIC RADIATION ELECTRON BEAMS ELECTRONS ELEMENTARY PARTICLES EXPERIMENTAL DATA FERMIONS GAMMA RADIATION GRAPHS HYDRATION HYDROXYL RADICALS INFORMATION IONIZING RADIATIONS IONS ISOLATED VALUES KINETICS LEPTON BEAMS LEPTONS MIXTURES NUMERICAL DATA ORGANIC COMPOUNDS ORGANIC NITROGEN COMPOUNDS PARTICLE BEAMS RADIATION CHEMISTRY RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY RADIATION EFFECTS RADIATIONS RADICALS RADIOLYSIS REACTION INTERMEDIATES REACTION KINETICS SOLUTIONS SOLVATED ELECTRONS SOLVATION SPECTRA SPECTROPHOTOMETRY
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Beschreibung
Zusammenfassung:	Oxygen-free aqueous solutions of dicyandiamide, DCDA, were exposed to /sup 60/Co ..gamma.. rays or a pulsed 10-MeV electron beam. Fast kinetic spectrophotometry was used for the study of free-radical intermediates, and computer simulation of the reaction mechanism for evaluation of experimental data. The hydrated electron reacts by addition, k(e/sub aq//sup -/ + DCDA) = 1.1 x 10/sup 10/M/sup -1/s/sup -1/; the anion radical (NH/sub 2/C(=NH)NHCN)/sup -/ absorbs in the UV region with lambda/sub max/
ISSN:	0022-3654 1541-5740
DOI:	10.1021/j100465a003