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William H. Casey Laboratory

From Wikipedia - http://en.wikipedia.org/wiki/Image:Water_droplet_blue_bg05.jpg


The Casey laboratory specialises broadly in aqueous chemistry related to the environmental and geological  sciences.  We employ model systems to approximate processes that occur in the natural environment. Recently we have been using NMR spectroscopy and ESI-MS to study the interaction of inorganic clusters with water to obtain information about transport and weathering phenomena.  In addition we look at such diverse systems as isotopic systematics in chlorophyll and the novel aqueous molecules potentially present in weathering radioactive waste. And importantly, we have fun while doing it! 

Recently, an article of ours on the reaction dynamics of the decaniobate ion was selected as Editor's choice, Science (Vol. 320(5881), 6th of June, 2008).

Recent publications

Each link leads to the relevant publisher's site

Adding reactivity to structure - reaction dynamics in a nanometer-size oxide ion in water

2008

  • Ohlin, C.A., Villa, E.M., Fettinger, J. C., Casey, W. H. Remarkable differences in the reactivity of two similar polyoxoniobates toward hydrogen peroxide, Angew. Chem. Int. Ed., accepted.
  • Villa,E.M., Ohlin, C. A., Balogh, E., Anderson, T. M., Nyman, M. D., Casey, W. H. Adding reactivity to structure - reaction dynamics in a nanometer-size oxide ion in water, Am. J. Sci., accepted.
  • Black, J. R., Epstein, E., Rains, W. D., Yin, Q-Z, Casey, W. H. Magnesium-isotope fractionation during plant growth: implications for the terrestial magnesium cycle, submitted.
  • Ohlin, C.A., Villa, E.M., Casey, W. H. One-pot synthesis of the decaniobate salt [N(CH3)4]6[Nb10O28].6 [H2O] from hydrous niobium oxide., Inorg. Chim. Acta (in press). Link
  • Ohlin, C.A., Villa, E.M., Fettinger, J. C., Casey, W. H. A new type of polyoxometalate structure - the [Ti12Nb6O44]-10 ion, Angew. Chem. Int. Ed. 2008, 47(30), 5634-5646. Link
  • Villa,E.M., Ohlin, C. A., Balogh, E., Anderson, T. M., Nyman, M. D., Casey, W. H. Reaction dynamics of the decaniobate ion [HxNb10O28](6-x)- in water, Angew. Chem. Int. Ed., 2008, 47(26), 4844-4846. Link
  • Balogh, E., Casey, W.H. (2008) High-pressure 17O NMR studies on some aqueous polyoxoions in water, Progress Nuclear Magn. Res. Spectr. (in press) Link
  • Evans, J.R., Rustad, J.R., Casey, W.H. (2008) Calculating geochemical reaction pathways - Exploration of the inner-sphere water exchange mechanism in Al(H2O)63+(aq) + n H2O with ab initio calculations and molecular dynamics. (2008) J. Phys. Chem. A 112(17), 4125-4140. Link

2007

  • Black, J. R., Yin, Q.Z., Rustad, J. R. and Casey, W. H. (2007) Magnesium isotopic equilibrium in chlorophylls. J. Amer. Chem. Soc. 129(28), 8690-8691. Link
  • Balogh, E., Anderson, T. M., Rustad, J. R., Nyman, M. and Casey, W. H. (2007) Rates of oxygen-isotope exchange between sites in the [HxTa6O19](8-x)-(aq) Lindqvist ion and aqueous solutions:Comparisons to [HxNb6O19](8-x)-(aq). Inorg. Chem. 46(17), 7032-7039. Link
  • Balogh, E., Todea, A. M., Mueller, A. and Casey, W. H. (2007) Rates of ligand exchange between >FeIII-OH2 functional groups on a nanometer-sized aqueous cluster and bulk solution. Inorg. Chem. 46(17), 7087-7092. Link
  • Weaver, M.L., Qiu, S.R., Hoyer, J.R., Casey, W.H., Nancollas, G.H., De Yoreo, J.J. (2007) Inhibition of calcium oxalate monohydrate growth by citrate and the effect of the background electrolyte. J. Cryst. Growth 306(1), 135-145 Link
  • Casey, W. H. and Rustad, J. R., (2007) Reaction dynamics, molecular clusters, and aqueous geochemistry Annual Rev. Earth Sci & Planetary Sci., 35, 21-46. Link
  • Wang, J. W., Rustad, J. R., and Casey, W. H., (2007) Calculation of water-exchange rates of aqueous polynuclear clusters and at oxide-water interfaces Inorg. Chem. 46(8), 2962-2964 Link .