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Reference Number EP/C013360/1
Title An exploration of transuranic electronic structure through actinyl coordination to polyoxometalates
Status Completed
Energy Categories NUCLEAR FISSION and FUSION(Nuclear Fission, Nuclear supporting technologies) 30%;
NOT ENERGY RELATED 70%;
Research Types Basic and strategic applied research 100%
Science and Technology Fields PHYSICAL SCIENCES AND MATHEMATICS (Chemistry) 100%
UKERC Cross Cutting Characterisation Not Cross-cutting 100%
Principal Investigator Professor RE Winpenny
No email address given
Chemistry
University of Manchester
Award Type Standard
Funding Source EPSRC
Start Date 01 December 2005
End Date 30 November 2008
Duration 36 months
Total Grant Value £269,283
Industrial Sectors Chemicals; Energy
Region North West
Programme Physical Sciences
 
Investigators Principal Investigator Professor RE Winpenny , Chemistry, University of Manchester (99.999%)
  Other Investigator Dr N Kaltsoyannis , Chemistry, University College London (0.001%)
  Industrial Collaborator Project Contact , Forschungszentrum Rossendorf e.V. (0.000%)
Project Contact , City University of New York, USA (0.000%)
Project Contact , British Nuclear Fuels plc (0.000%)
Web Site
Objectives
Abstract The radioactive actinide elements (all f-transition metals) form the last complete class of elements in the periodic table. The two most well known actinides are uranium and plutonium, primarily due to their application in nuclear power and nuclear weapons. Two other actinides, neptunium and americium, are similarly important with respect to nuclear waste management. However, despite the key technological and environmental significance of all four elements, most chemical laboratories are restricted to research on uranium due to the high radioactivity of the other three elements. Little is known about the highly radioactive, yet very important, neptunium, plutonium and americium.In contrast, the chemistry of non-radioactive tungsten (a d-transition metal) is much better understood. Our interest in tungsten stems from its ability to form heteropolyoxotungstates (HPTs), compounds which feature linked oxygen octahedra surrounding tungsten atoms and which also incorporate additional 'hetero' elements. Many of these HPT compounds can bind to different metal cations, including actinide cations. Recently we have shown that the uranyl cation (an important linear dioxo unit of uranium) will readily bind to selected HPT ligands, and we have evidence to suggest that actinyl cations of neptunium, plutonium and americium will behave in the same way.We propose to study the interaction between the full range of actinyl cations (i.e. those of uranium, neptunium, plutonium and americium) with HPT ligands in an attempt to greatly increase our understanding of the chemistry of the tranuranium elements (i.e. those beyond uranium, including neptunium, plutonium and americium). This will be achieved, experimentally, by accessing specialist facilities for transuranium chemistry in the UK (at Manchester and BNFL Sellafield), elsewhere in Europe and in the US. By accessing a wide range of chemical techniques we will gain a very thorough understanding of the bonding interactions in the complexes that we prepare. The chemistry will be very challenging, with experiments using only a few milligrams of transuranium element, contrasting with the solely tungsten chemistry where many grams of HPT ligand can be prepared safely in a research laboratory. This experimental research will be complemented by a computational study in which state of the art computer programs will be used to study the actinide compounds prepared, and further advance our knowledgeof the chemistry of the actinide elements
Publications (none)
Final Report (none)
Added to Database 01/01/07