个人简介

Ph.D. (2000) University of California at Santa Barbara

研究领域

Chemistry of Materials/Environment and Energy/Solid State Chemistry/Supramolecular Chemistry/Synthesis and Catalysis

SOLID STATE CHEMISTRY; FLUX GROWTH OF NEW INORGANIC MATERIALS Research in our lab is focused on the synthesis of new inorganic materials using molten salts or metal fluxes as reaction media. Growth of magnetic phases and hydrogen storage alloys is of particular interest. A variety of synthetic techniques are used (such as solid state synthesis, hydrothermal synthesis, and growth from fluxes) and several characterization methods are employed (crystallography, solid state NMR, magnetic and optical measurements) to explore the structure and properties of the products. SYNTHESIS AND ION EXCHANGE IN MOLTEN SALTS Molten salts possess a wide electrochemical window allowing for the production of unusual ionic species which would be unstable in traditional solvents. For instance, addition of gallium metal to a mixture of NaCl and GaCl3 results in the formation of Ga+ ions in the molten solution; likewise, Bi+ and Bi53+ clusters are formed upon addition of bismuth metal to a molten NaCl/BiCl3/GaCl3 mixture. This presents the possiblility of not only synthesizing unusual cluster compounds, but also trapping some of the unusual metastableionic species within the cages of porous aluminosilicate zeolites by ion-exchange. Such clusters are likely to have unusual luminescence or magnetic characteristics. Molten salt systems of interest include ionic liquids, eutectic salt mixtures, and polyelectrolyte solutions. GROWTH OF INTERMETALLICS IN METAL FLUXES Reactions in metal fluxes are carried out to grow large crystals of semiconductors and intermetallic compounds. For some fluxes, the solvent metal is incorporated into the product, or otherwise plays an active role such as scavenging or decomposing one of the reactants. The reducing ability of molten aluminum has been utilized to form intermetallics from oxide precursors--for example, the combination of SrTiO3 and Au in excess Al produces the intermetallic aluminide phase Sr3Au7Al26Ti. Calcium-rich fluxes have yielded a number of new phases such as Ca21Ni2Zn36 which may be of interest for hydrogen storage. Reactions in metal flux mixtures of lanthanides and transition metals have produced phases with structures containing a high concentration of magnetic ions; these compounds show ferromagnetic or antiferromagnetic transitions.

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Lang David A.; Latturner Susan E. Two Germanide Hydride Phases Grown in Calcium-Rich Flux: Use of Interstitial Elements for Discovery of New Phases. EUROPEAN JOURNAL OF INORGANIC CHEMISTRY 2011, Issue: 26 Special Issue: SI, 4006-4011 Reynolds Patricia C.; Stojanovic Milorad; Latturner Susan E. Flux growth of a new cobalt-zinc-tin ternary phase Co(7+x)Zn(3-x)Sn(8) and its relationship to CoSn. JOURNAL OF SOLID STATE CHEMISTRY 2011, Volume: 184 Issue: 7, 1875-1881 Zaikina, JV (Zaikina, Julia V.); Schellenberg, I (Schellenberg, Inga); Benbow, EM (Benbow, Evan M.); Pottgen, R (Poettgen, Rainer);Latturner, SE (Latturner, Susan E.) Influence of the La/M Network on Magnetic Properties of Mn(4) Tetrahedra in Intermetallic Compounds La(21-delta)Mn(8)M(7)C(12) (M = Ge, Sn, Sb, Te, Bi). CHEMISTRY OF MATERIALS 2011, Volume: 23 Issue: 7, 1768-1778 Lang, DA (Lang, David A.)1; Zaikina, JV (Zaikina, Julia V.)1; Lovingood, DD (Lovingood, Derek D.)2; Gedris, TE (Gedris, Thomas E.)1; Latturner, SE (Latturner, Susan E.)1 Ca(2)LiC(3)H: A New Complex Carbide Hydride Phase Grown in Metal Flux. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 2010, Volume: 132 Issue: 49, 17523-17530 Zaikina Julia V.; Zhou Haidong; Latturner Susan E. Structural relationships between new carbide La(14)Sn(MnC(6))(3) and fully ordered La(11)(MnC(6))(3). JOURNAL OF SOLID STATE CHEMISTRY 2010, Volume: 183 Issue: 12, 2987-2994