Issue 9, 2011

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

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.

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

Supplementary files

Article information

Article type
Paper
Submitted
30 Sep 2010
Accepted
02 Dec 2010
First published
12 Jan 2011

J. Mater. Chem., 2011,21, 3006-3013

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

F. Barka-Bouaifel, J. Niedziółka-Jönsson, X. Castel, O. Saison, A. Akjouj, Y. Pennec, B. Djafari-Rouhani, P. Woisel, J. Lyskawa, L. Sambe, G. Cooke, N. Bezzi, R. Boukherroub and S. Szunerits, J. Mater. Chem., 2011, 21, 3006 DOI: 10.1039/C0JM03293J

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