Optical and electrochemical properties of tunable host–guest complexes linked to plasmonic interfaces

Barka-Bouaifel, F. et al. (2011) Optical and electrochemical properties of tunable host–guest complexes linked to plasmonic interfaces. Journal of Materials Chemistry, 21(9), pp. 3006-3013. (doi: 10.1039/C0JM03293J)

Abstract

This article describes the use of localized surface plasmon resonance (LSPR) interface to detect complexation/decomplexation steps of a controllable host–guest system at the solid–liquid interface. The LSPR interfaces consist of a sandwiched structure comprising a tin-doped indium oxide (ITO) substrate, gold nanostructures (Au NSs) and a thin ITO film overcoating. “Click” chemistry was used to covalently link an alkyne-functionalized π-electron deficient tetracationic cyclophane cyclobis(paraquat-p-phenylene) (CBPQT⁴⁺) unit to an azide-terminated LSPR interface. The modified interfaces were characterized using X-ray photoelectron spectroscopy (XPS), cyclic voltammetry and UV-vis transmission spectroscopy. Tetrathiafulvalene (TTF) was used as a model guest molecule to demonstrate the possibility to follow the complexation/decomplexation events by monitoring the change in the LSPR signal. The results demonstrate that redox controlled host–guest complexation at the surface can be monitored effectively using LSPR.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Cooke, Professor Graeme
• Authors: Barka-Bouaifel, F., Niedziółka-Jönsson, J., Castel, X., Saison, O., Akjouj, A., Pennec, Y., Djafari-Rouhani, B., Woisel, P., Lyskawa, J., Sambe, L., Cooke, G., Bezzi, N., Boukherroub, R., and Szunerits, S.
• Subjects: Q Science > QD Chemistry
• College/School: College of Science and Engineering > School of Chemistry
• Journal Name: Journal of Materials Chemistry
• ISSN: 0959-9428
• Published Online: 12 January 2011