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Photo-Chemical Reduction of Water by Europium (II) Ion, and the Magnetic Susceptibilities of Europium (II) and (III) Ions

Douglas, David L. and Yost, Don M. (1949) Photo-Chemical Reduction of Water by Europium (II) Ion, and the Magnetic Susceptibilities of Europium (II) and (III) Ions. Journal of Chemical Physics, 17 (12). pp. 1345-1346. ISSN 0021-9606. doi:10.1063/1.1747181.

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The slow reaction of europium (II) ion with hydrogen ion or water to produce hydrogen and europium (III) ion has been previously reported. Prior to an investigation of the aqueous chemistry of europium (II) ion, the study of this reaction was undertaken. It was decided to follow the course of the reaction by observing the change in magnetic susceptibility of the reaction mixture, using a Gouy balance. This method was suggested by the aforementioned work of R. A. Cooley. Preliminary experiments showed that solutions 0.25 min europium (II) chloride and about 0.3 m in hydrochloric acid were stable over periods of weeks when kept in the dark, but evolved hydrogen and changed susceptibility rapidly when exposed to bright light (either sunlight or a tungsten lamp). One other such system has been reported in the literature. Poterill, Walker, and Weiss investigated the photo-chemical reduction of water by iron (II) ion.

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Additional Information:© 1949 American Institute of Physics. Received October 14, 1949. The europium used in these researches was a gift of the late Dr. H. N. McCoy and was of greater than 99.9 percent purity as regards other rare earths. Our supply was augmented by a loan of more of the same material by Mrs. Ethel Terry McCoy, for which we are exceedingly grateful. We wish to thank Professor N. Davidson and Dr. O. Wulf for many helpful discussions and suggestions. We are also very grateful to the Research Corporation for a grant which aided, in part, the work reported here. The junior author (David L. Douglas) is indebted to the Atomic Energy Commission for financial assistance in the form of a fellowship for the year 1948-49. Contribution No. 1345.
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Research CorporationUNSPECIFIED
Atomic Energy CommissionUNSPECIFIED
Subject Keywords:Europium; Magnetic susceptibilities
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Caltech Gates and Crellin Laboratories of Chemistry1345
Issue or Number:12
Record Number:CaltechAUTHORS:20140506-101027928
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Official Citation:Douglas, D. L., & Yost, D. M. (1949). Photo‐Chemical Reduction of Water by Europium (II) Ion, and the Magnetic Susceptibilities of Europium (II) and (III) Ions. The Journal of Chemical Physics, 17(12), 1345-1346. doi: doi:
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ID Code:45522
Deposited On:06 May 2014 17:39
Last Modified:10 Nov 2021 17:04

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