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    Functional and Structural Characterization of Nanoparticulate Transition Metal Complexes Prepared Using Precipitation with Compressed Carbon Dioxide as an Antisolvent

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    Issue Date
    2008-04-29
    Author
    Johnson, Chad Aaron
    Publisher
    University of Kansas
    Format
    145 pages
    Type
    Dissertation
    Degree Level
    PH.D.
    Discipline
    Chemical & Petroleum Engineering
    Rights
    This item is protected by copyright and unless otherwise specified the copyright of this thesis/dissertation is held by the author.
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    Abstract
    Nanostructures with novel size-dependent functional properties are rapidly emerging. In this dissertation, molecule-based nanoparticles of Cobalt-salen complexes were prepared from an organic solution of the compound using the precipitation with compressed antisolvent (PCA) technique. In situ X-ray absorption spectroscopy (EXAFS and XANES) in conjunction with quantitative microbalance techniques were employed to gain insight into the relationship between the structure and the gas binding ability of the nanoparticles. Unprocessed Co(salen), the starting material, was found to be of a square planar geometry and displayed no measurable binding for either dioxygen (O2) or nitric oxide (NO). In contrast, the Co(salen) nanoparticles with a distorted tetrahedral geometry showed near-stoichiometric O2 uptake as well as reactivity with NO. The nanoparticles were successfully coated on alumina supports using a Wurster-type coating device. These findings open new avenues for formation and novel applications of nanoparticulate metal complexes.
    URI
    http://hdl.handle.net/1808/3998
    Collections
    • Dissertations [4475]
    • Engineering Dissertations and Theses [1055]

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    785-864-8983
    KU Libraries
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    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
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    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

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