Mono and bi-component peptide-based self-assembled monolayers (SAMs) immobilized on a gold surface were studied by electrochemical and spectroscopic techniques. The peptides investigated were exclusively formed by Cα-tetrasubstituted amino acids. These residues, due to their peculiar conformational properties, constrain the peptide in a helical conformation, as confirmed by X-ray diffraction structure determinations, and Circular Dichroism and NMR experiments in solution. Both mono-and bi-component peptide SAMs were functionalized with electroactive, fluorescent chromophores strongly absorbing in the UV region. While electrochemical experiments indicated the formation of densely-packed films on the gold surface, fluorescence spectroscopy revealed the occurrence of aromatic-aromatic interactions between the pyrene units functionalizing the peptide chains, obtaining important information on the structural and dynamical properties of the peptide SAMs investigated. © 2012 Springer Science+Business Media, LLC.
CITATION STYLE
Caruso, M., Porchetta, A., Gatto, E., Venanzi, M., Crisma, M., Formaggio, F., & Toniolo, C. (2012). Spectroscopy and electrochemistry of peptide-based self-assembled monolayers. In Lecture Notes in Electrical Engineering (Vol. 109 LNEE, pp. 73–77). https://doi.org/10.1007/978-1-4614-0935-9_13
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