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    Barium sulfate crystallization dependence on upper rim calix[4]arene functional groups

    171322_171322.pdf (474.1Kb)
    Access Status
    Open access
    Authors
    Baynton, A.
    Ogden, Mark
    Raston, C.
    Jones, Franca
    Date
    2012
    Type
    Journal Article
    
    Metadata
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    Citation
    Baynton, Andrew and Ogden, Mark I. and Raston, Colin L. and Jones, Franca. 2012. Barium sulfate crystallization dependence on upper rim calix[4]arene functional groups. CrystEngComm. 14 (3): pp. 1057-1062.
    Source Title
    CrystEngComm
    DOI
    10.1039/C1CE06083J
    ISSN
    14668033
    School
    Nanochemistry Research Institute (Research Institute)
    URI
    http://hdl.handle.net/20.500.11937/13367
    Collection
    • Curtin Research Publications
    Abstract

    Although the effects of p-sulfonated and p-phosphonated calix[4]arene on barium sulfate morphology are similar, their ability to form mesocrystals of material are markedly different. The p-phosphonated calix[4]arene results in the formation of fibre bundles similar to those previously observed during barium sulfate crystallization in the presence of di-block copolymers. The isostructural sulfonated calix[4]arene, however, affords material consistent with the initial formation of mesocrystals which subsequently fuse. This material shows significant beam damage when viewed under a transmission electron microscope (TEM) suggesting incorporation of the sulfonated calix[4]arene, although there was no evidence of this from X-ray diffraction and atomic force microscopy (AFM) studies. We hypothesise that this calixarene is incorporated without significant change in structure of the material, and that the interaction of the macrocycle with the barium sulfate lattice is sufficiently weak that surface AFM imaging is effective in removing it from the surface.

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