Journal ArticleDOI
Characterization of bonded phases by solid-state NMR spectroscopy
Klaus Albert,Ernst Bayer +1 more
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TLDR
In this paper, the structure and dynamics of chemically modified silica gels have been investigated by high-resolution solid-state NMR spectroscopy using 29Si cross-polarization and magic angle spinning (CP-MAS).About:
This article is published in Journal of Chromatography A.The article was published on 1991-05-17. It has received 265 citations till now. The article focuses on the topics: Fluorine-19 NMR & Transverse relaxation-optimized spectroscopy.read more
Citations
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The silanol group and its role in liquid chromatography
TL;DR: In this paper, a review of the current state of knowledge on silica surface chemistry and the impact of the chemistry on chromatography of basic solutes is discussed, and the influence of the silica surfaces on the stability of bonded phases is also described.
Journal ArticleDOI
Self-Assembly Is Not the Only Reaction Possible between Alkyltrichlorosilanes and Surfaces: Monomolecular and Oligomeric Covalently Attached Layers of Dichloro- and Trichloroalkylsilanes on Silicon
TL;DR: The thickness of the layers formed from dichloro-and trichlorosilanes (as assessed by ellipsometry) is on the order of the single molecule sizes and increases gradually with alkyl chain length as discussed by the authors.
Journal ArticleDOI
Trialkylsilane Monolayers Covalently Attached to Silicon Surfaces: Wettability Studies Indicating that Molecular Topography Contributes to Contact Angle Hysteresis
TL;DR: In this paper, a series of nine H(CH2)nMe2Si− surfaces were prepared with n = 1, 2, 3, 4, 8, 10, 12, 18, and 22.
Journal ArticleDOI
Synthesis of nitric oxide-releasing gold nanoparticles.
TL;DR: The synthesis of nitric oxide-releasing gold nanoparticles formed by place-exchange reaction of hexanethiol monolayer-protected clusters with diamine nitricoxide donor precursor molecules, which are subsequently converted to N-diazeniumdiolate NO donors.
Journal ArticleDOI
Method for measuring the logarithm of the octanol-water partition coefficient by using short octadecyl-poly(vinyl alcohol) high-performance liquid chromatography columns.
TL;DR: A simple, quick, versatile and inexpensive HPLC method to estimate the logarithm of the octanol-water partition coefficient (log Pow) employing a methanol-water gradient and a short octadecyl-poly(vinyl alcohol) (ODP) column is described.
References
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Journal ArticleDOI
Carbon-13 nuclear magnetic resonance of polymers spinning at the magic angle
Journal ArticleDOI
Magic-Angle13C NMR Analysis of Motion in Solid Glassy Polymers
Journal ArticleDOI
Silicon-29 NMR study of the surface of silica gel by cross polarization and magic-angle spinning
Gary E. Maciel,Dean W. Sindorf +1 more
Journal ArticleDOI
Silicon-29 NMR study of dehydrated/rehydrated silica gel using cross polarization and magic-angle spinning
Dean W. Sindorf,Gary E. Maciel +1 more
TL;DR: In this article, a /sup 29/Si NMR study was carried out on silica gel, using cross polarization and magic-angle spinning (CP/MAS), and spectral changes observed in these experiments could not be accounted for by a single structural model of the types that have been advanced previously for silica surfaces.
Journal ArticleDOI
Cross-polarization magic-angle-spinning silicon-29 nuclear magnetic resonance study of silica gel using trimethylsilane bonding as a probe of surface geometry and reactivity
Dean W. Sindorf,Gary E. Maciel +1 more
TL;DR: In this article, a methodology has been developed to provide quantitative relationships on structure and reactivity from the /sup 29/Si CP/MAS spectra, using cross polarization (CP) and magic-angle spinning (MAS).
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