Résumé
The grafting of benzylic amide macrocycles, the basic units of more complex mechanically interlocked
architectures such as catenanes and rotaxanes, was performed via the functionalization of an acid-terminated
self-assembled monolayer (SAM) of 11-mercaptoundecanoic acid (11-MUA). Both chemical and physical
adsorption were investigated using macrocycles containing either a reactive hydroxyl functionality or an exopyridyl
moiety, with characterization of the systems using X-ray photoelectron spectroscopy (XPS), contact
angle measurements, and reflection absorption infrared spectroscopy (RAIRS). By comparing theoretical values
with experimental data, it was found that up to 40% of the acid groups on the SAM surface were modified
by the macrocycles and that the macrocycle coverage can be controlled by varying the reaction time. Stability
tests demonstrated that the prepared films are stable in air, under ultrasound treatment and against chemical
substitution. RAIRS measurements suggested a tilted orientation of the macrocycle with respect to the plane
of the SAM surface.
langue originale | Anglais |
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Pages (de - à) | 10863-10872 |
Nombre de pages | 10 |
journal | Journal of physical chemistry B |
Volume | 107 |
Etat de la publication | Publié - 2003 |