METAL ION SENSITIZED RADIOLYSIS OF ETHYLENEDIAMINE IN DILUTE AQUEOUS SOLUTIONS
The radiolytically induced deamination of ethylenediarnine in dilute aqueous solutions was investigated, using Co/sup 60/ gamma rays. In solutions of concentration up to 0.1M, the deamination is due primarily to the action of OH radicals. 2-Propanol and formic acid were shown to be much more reactive toward OH radicals and act as efficient scavengers. When the deamination was carried out under N/sub 2/O, evidence was found for the existence of N/sub 2/OH. On addition of thallous ions the deamination proceeds in the presence of overwhelming amounts of organic scavengers. The effect of thallous ions is nullified when strong complexing agents are added or when acidity is increased. A similar effect is observed when cupric ions are added; moreover, in this case it was shown that deamination is induced also by HO/sub 2/ radicals, which are otherwise nonreactive at the given range of concentrations. Other metal ions which form strong complexes with ethylenediamine but are not capable of reacting with OH or HO/sub 2/ radicals, by electron transfer; nickel, lead, and platinum, were shown to have no effect on the deamination process. It was demonstrated that metal ions, which may undergo fast reactions with the reactive species in radiolyzed water, will selectively induce radiolytic decomposition in their organic ligands. (auth)
- Research Organization:
- Weizmann Inst. of Science, Rehovoth, Israel and Soreq Research Establishment, Rehovoth, Israel
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-18-005381
- OSTI ID:
- 4121773
- Report Number(s):
- IA-850; 0022-3654
- Journal Information:
- Journal of Physical Chemistry (U.S.), Journal Name: Journal of Physical Chemistry (U.S.) Vol. Vol: 67; ISSN JPCHA
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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