Electrochemistry of Cyclodextrin Thin Films

Numerous electrochemical papers concern complexation abilities, electrochemical properties, and analytical applications of thin films of CyDs attached to the elec- 

Monolayer or sequential monolayer modifications of electrodes are performed using either the Langmuir-Blodgett (L-B) technique, in which the monolayer is formed at an air-water interface and transferred onto solid electrode substrates, or the self-assembly method directly from the solution. 

Various amphiphilic a- and jS-CyDs functionalized with alkyl chains at the primary hydroxy positions or modified on the secondary face form stable and well-organized monomolecular layers at the air-water interface [47, 48]. They can then be used for the preparation of L-B films on solid substrates. Electroactive CyDs persubstituted with electroactive groups, e.g. terathiafulvalene (TTF) moieties [49], were transferred as L-B films from the water surface with a transfer ratio of 1 to the solid substrate (Fig. 10.5.3). Charge-transfer interactions in the 

L-B films were then studied and new sensing devices were proposed [50-56]. More information on CyD-based devices is presented in Chapter 16. 

By controlling the electrode potential, a delicate balance of various interactions can be achieved, resulting in the self-organization of molecules on the surface [57-59]. 

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