Electrochemical and spectroscopic investigations of uranium(III) with N,N,N′,N′-tetramethylmalonamide in DMF

T. Yamamura; K. Shirasaki; D. X. Li; Y. Shiokawa

doi:10.1016/j.jallcom.2005.10.055

Electrochemical and spectroscopic investigations of uranium(III) with N,N,N′,N′-tetramethylmalonamide in DMF

T. Yamamura, K. Shirasaki, D. X. Li, Y. Shiokawa

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

In order to investigate the electrode reaction of negative electrolyte, U(III)/U(IV), of the all-uranium redox-flow battery proposed by us, we investigated the magnetic susceptibility, spectroscopy and electrode reactions of U(III) and U(IV) complexes with N,N,N′,N′-tetramethylmalonamide (TMMA). The effective magnetic moment for the U(III) complex (1.95μ_B/atomU) is significantly smaller than the theoretical moment for free U³⁺ ion, and this may indicate the itinerant nature of U(III) due to the coordination of TMMA. In N,N-dimethylformamide (DMF), the energy levels due to f-f transitions was only slightly perturbed from those of uranium(III) perchlorate in DMF. The U(III)/U(IV) redox potential of U(III)-TMMA complex shifted negatively from that of uranium(III) perchlorate.

Original language	English
Pages (from-to)	139-144
Number of pages	6
Journal	Journal of Alloys and Compounds
Volume	418
Issue number	1-2
DOIs	https://doi.org/10.1016/j.jallcom.2005.10.055
Publication status	Published - 2006 Jul 20

Keywords

Effective magnetic moment
Electrochemical investigation
N,N,N′,N′-Tetramethylmalonamide
Trivalent uranium
f-f Transition

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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title = "Electrochemical and spectroscopic investigations of uranium(III) with N,N,N′,N′-tetramethylmalonamide in DMF",

abstract = "In order to investigate the electrode reaction of negative electrolyte, U(III)/U(IV), of the all-uranium redox-flow battery proposed by us, we investigated the magnetic susceptibility, spectroscopy and electrode reactions of U(III) and U(IV) complexes with N,N,N′,N′-tetramethylmalonamide (TMMA). The effective magnetic moment for the U(III) complex (1.95μB/atomU) is significantly smaller than the theoretical moment for free U3+ ion, and this may indicate the itinerant nature of U(III) due to the coordination of TMMA. In N,N-dimethylformamide (DMF), the energy levels due to f-f transitions was only slightly perturbed from those of uranium(III) perchlorate in DMF. The U(III)/U(IV) redox potential of U(III)-TMMA complex shifted negatively from that of uranium(III) perchlorate.",

keywords = "Effective magnetic moment, Electrochemical investigation, N,N,N′,N′-Tetramethylmalonamide, Trivalent uranium, f-f Transition",

author = "T. Yamamura and K. Shirasaki and Li, {D. X.} and Y. Shiokawa",

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T1 - Electrochemical and spectroscopic investigations of uranium(III) with N,N,N′,N′-tetramethylmalonamide in DMF

AU - Yamamura, T.

AU - Shirasaki, K.

AU - Li, D. X.

AU - Shiokawa, Y.

PY - 2006/7/20

Y1 - 2006/7/20

N2 - In order to investigate the electrode reaction of negative electrolyte, U(III)/U(IV), of the all-uranium redox-flow battery proposed by us, we investigated the magnetic susceptibility, spectroscopy and electrode reactions of U(III) and U(IV) complexes with N,N,N′,N′-tetramethylmalonamide (TMMA). The effective magnetic moment for the U(III) complex (1.95μB/atomU) is significantly smaller than the theoretical moment for free U3+ ion, and this may indicate the itinerant nature of U(III) due to the coordination of TMMA. In N,N-dimethylformamide (DMF), the energy levels due to f-f transitions was only slightly perturbed from those of uranium(III) perchlorate in DMF. The U(III)/U(IV) redox potential of U(III)-TMMA complex shifted negatively from that of uranium(III) perchlorate.

AB - In order to investigate the electrode reaction of negative electrolyte, U(III)/U(IV), of the all-uranium redox-flow battery proposed by us, we investigated the magnetic susceptibility, spectroscopy and electrode reactions of U(III) and U(IV) complexes with N,N,N′,N′-tetramethylmalonamide (TMMA). The effective magnetic moment for the U(III) complex (1.95μB/atomU) is significantly smaller than the theoretical moment for free U3+ ion, and this may indicate the itinerant nature of U(III) due to the coordination of TMMA. In N,N-dimethylformamide (DMF), the energy levels due to f-f transitions was only slightly perturbed from those of uranium(III) perchlorate in DMF. The U(III)/U(IV) redox potential of U(III)-TMMA complex shifted negatively from that of uranium(III) perchlorate.

KW - Effective magnetic moment

KW - Electrochemical investigation

KW - N,N,N′,N′-Tetramethylmalonamide

KW - Trivalent uranium

KW - f-f Transition

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JO - Journal of Alloys and Compounds

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ER -

Electrochemical and spectroscopic investigations of uranium(III) with N,N,N′,N′-tetramethylmalonamide in DMF

Abstract

Keywords

ASJC Scopus subject areas

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