Journal
JOURNAL OF SEPARATION SCIENCE
Volume 33, Issue 19, Pages 2965-2976Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/jssc.201000154
Keywords
Hydrophilic interaction chromatography; Silica; Trishydroxymethyl aminomethane
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Funding
- Swedish Science Research Council (VR)
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A new method is presented for synthesizing a highly hydrophilic silica-based material for use in hydrophilic interaction chromatography. Porous silica particles used as a starting substrate were modified with 3-bromopropyl trichlorosilane and grafted with glycidyl methacrylate by controlled (living) atom transfer radical polymerization in order to introduce an oxirane-carrying reactive tentacle layer on the silica surface. The grafted material was thereafter subject to an oxirane ring opening reaction with tris(hydroxymethyl)aminomethane in dimethylformamide to yield a polymer-bound equivalent of the well known and highly hydrophilic TRIS buffering substance. Chemical characterization was done by diffuse reflectance FT-IR, X-ray photoelectron spectroscopy, elemental analysis, and H-1 NMR. Porosity and surface area examination was done with Brunauer-Emmett-Teller. Chromatographic application of the material was evaluated by separations of nucleic bases, small organic acids, and common nucleotides under mixed hydrophilic interaction chromatography and weak anion exchange conditions.
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