Abstract
The Raman scattering spectra for polyaminopropylsiloxane (poly-APS) samples in the solid state and in aqueous solution and for the related compounds, γ-aminobutyric acid (GABA) and its hydrochloride salt (GABA • HCl), have been examined in the CH2 rock and skeletal stretch region. The Raman spectrum of the solid poly-APS sample may be accounted for by direct combination of the Raman spectra for GABA and GABA • HCl, whose crystal structures have been elucidated by a single-crystal X-ray diffraction study, suggesting that the APS segments of poly-APS in the solid state are in a conformationally ordered state. It has also been found that the Raman spectra of the solid and aqueous poly-APS samples in this region are useful for diagnosing the conformations of APS moieties bound onto the surface of silica gel.
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Shimizu, I., Okabayashi, H., Taga, K. et al. Raman scattering study of polyaminopropylsiloxane and its compounds for characterization of 3-aminopropylsilane-modified silica gel. Utility of the CH2 rock and skeletal stretch modes. Colloid Polym Sci 275, 555–560 (1997). https://doi.org/10.1007/s003960050118
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DOI: https://doi.org/10.1007/s003960050118