Identification and quantification of cis and trans isomers in aminophenyl double-decker silsesquioxanes using 1H-29Si gHMBC NMR

B. W. Schoen, D. Holmes, A. Lee

    Research output: Contribution to journalArticle

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    Abstract

    Cis and trans isomers of a series of double-decker silsesquioxanes (DDSQ) were characterized by two-dimensional NMR techniques. The 1H NMR spectra of these species have not previously been assigned to a degree that allows for quantification. Thus, 1H-29Si HMBC correlations were applied to facilitate 1H spectral assignment and also to confirm previous 29Si assignments for this class of silsesquioxanes. With the ability to identify all the pertinent resonances of the 1H NMR spectrum, 29Si NMR is no longer required for quantification and required only for characterization. This not only saves time and material but also provides a more accurate quantification, thus allowing for the ratio of cis and trans isomers present in each compound to be determined. A more accurate measure of the cis/trans ratio enables the investigation of its influence on the physical and chemical properties of DDSQ nanostructured materials.

    Original languageEnglish (US)
    Pages (from-to)490-496
    Number of pages7
    JournalMagnetic Resonance in Chemistry
    Volume51
    Issue number8
    DOIs
    StatePublished - Aug 2013

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    Keywords

    • 2D NMR
    • H
    • H-Si HMBC
    • Si
    • double-decker silsesquioxanes; cis/trans isomers
    • NMR

    ASJC Scopus subject areas

    • Chemistry(all)
    • Materials Science(all)

    Cite this

    Identification and quantification of cis and trans isomers in aminophenyl double-decker silsesquioxanes using 1H-29Si gHMBC NMR. / Schoen, B. W.; Holmes, D.; Lee, A.

    In: Magnetic Resonance in Chemistry, Vol. 51, No. 8, 08.2013, p. 490-496.

    Research output: Contribution to journalArticle

    Schoen, B. W.; Holmes, D.; Lee, A. / Identification and quantification of cis and trans isomers in aminophenyl double-decker silsesquioxanes using 1H-29Si gHMBC NMR.

    In: Magnetic Resonance in Chemistry, Vol. 51, No. 8, 08.2013, p. 490-496.

    Research output: Contribution to journalArticle

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