INFRARED SPECTRA OF THE MOLECULAR IONS AND RADICALS PRODUCED BY PROTON RADIOLYSIS AND ARGON RESONANCE PHOTOLYSIS OF THE FREON 11-14 SERIES DURING CONDENSATION AT $15^\circ K$

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1976

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Ohio State University

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Samples of the Freon 11-14 series (CFnCl4−n,n1−4) at high dilution in argon were deposited at 15K during simultaneous 2.0 keV proton beam irradiation. And the products studied by infrared spectroscopy. Exceedingly large yields of the primary radicals CCl3,CFC12,CF2Cl and CF3 were formed in the various experiments ; in addition, several other absorptions were observed and have been assigned to a number of new molecular species. It is believed that some molecular ions were trapped in electrically neutral species of the type CFC12+Cl , while others were trapped as isolated ions; the isolated ions were readily destroyed by photobleaching and neutralization with thermal electrons from an exposed bulb filament. Samples of the Freon 11-14 series at high dilution in argon were also deposited and simultaneously photolyzed by argon resonance radiation from a microwave discharge. While the trihalomethyl radicals were principal products of the proton beam irradiation, these radicals were produced in very low yield by photolysis+ADs- instead, the electrically neutral ion-paired species were predominately formed. The spectra and structure of the products formed in those experiments will be discussed.

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Author Institution: Department of Chemistry, University of Virginia

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