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

Fatiha Barka-Bouaifel (1) , Joanna Niedziółka-Jönsson (1) , Xavier Castel (2) , Ophélie Saison-Francioso (3) , Abdellatif Akjouj (3) , Yan Pennec (3) , Bahram Djafari-Rouhani (3) , Patrice Woisel (4) , Joël Lyskawa (4) , Léna Sambe (4) , Graeme Cooke (5) , Nacer Bezzi (6) , Rabah Boukherroub (7) , Sabine Szunerits (1, 3)

1 IRI - Institut de Recherche Interdisciplinaire [Villeneuve d'Ascq]
2 IETR - Institut d'Electronique et de Télécommunications de Rennes
3 IEMN - Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520
4 UMET - Unité Matériaux et Transformations - UMR 8207
5 University of Glasgow
6 LTMGP - Laboratoire de Technologie des Matériaux et de Génie des Procédés
7 NBI - IEMN - NanoBioInterfaces - IEMN

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.

Domaines: Matériaux

Fatiha Barka-Bouaifel, Joanna Niedziółka-Jönsson, Xavier Castel, Ophélie Saison-Francioso, Abdellatif Akjouj, et al.. Optical and electrochemical properties of tunable host-guest complexes linked to plasmonic interfaces. Journal of Materials Chemistry, 2011, 21 (9), pp.3006-3013. ⟨10.1039/c0jm03293j⟩. ⟨hal-00579079⟩