Abstract
In this study, epoxy‐terminated silicon oxide surfaces were chemically derivatized with trifluoroacetic anhydride (TFAA) and 4‐(trifluoromethyl)‐benzylamine (TFMBA) and analyzed by X‐ray photoelectron spectroscopy, near‐edge X‐ray absorption fine structure spectroscopy and water contact angle measurements. TFAA was used for quantitative derivatization to determine the amount of reactive epoxy groups on these surfaces. Furthermore, epoxy‐terminated surfaces were derivatized with TFMBA (a model compound for biomolecules with an amino linker) yielding secondary amines because of formation of covalent C–N bonds between TFMBA and the epoxy films. Fluorine being part of TFAA and TFMBA composition was used to follow the progress of the chemical derivatization reaction. Both derivatization agents – TFAA and TFMBA – gave comparable reaction yields of ~60% on epoxy silicon surfaces, whereas on epoxy glass slides, the derivatization yields were considerably lower (30–40%).The protocol for attachment of TFMBA (model compound) on epoxy‐modified surfaces was adapted to (bio)molecules with an amino linker, e.g. carbohydrates to prepare carbohydrate‐functionalized biointerfaces. Copyright © 2014 John Wiley & Sons, Ltd.
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