Lewis basicity, adhesion thermodynamic work and coordinating ability on aminated silicon surfaces

摘要

Silicon(100) surfaces have been modified with three different amines (aniline, benzylamine and dodecylamine) and diamines (4-aminopyridine, 4-aminomethylpyridine, 1,12-dodecyldiamine). The surface energy was measured by contact angle technique. For Si-diamine surfaces, Lewis basicity (using Fowkes-van Oss-Chaudhury-Good surface tension model) and adhesion thermodynamic work (using chemical force microscopy) were determined. We related these data, the amine/diamine nature and their geometry on the surface (via DFT calculations) with the consequent ability to coordinate copper(Ⅱ) acetate. Finally, copper(Ⅱ) acetate monolayers behavior was studied by cyclic voltammetry.