Stable condensed monolayers of four different amphiphilic derivatives of β-cyclodextrin were formed on a water subphase. The base of the cylindrical cyclodextrin residue was found to be parallel to the water surface. Langmuir–Blodgett films were obtained for three derivatives.
Azobenzenes in the host–guest Langmuir–Blodgett films prepared with amphiphilic β-cyclodextrin and azobenzene derivatives showed a photochromic behavior with complete reversibility owing to the free volume of cyclodextrin cavity, whereas the trans-to-cis isomerization was restricted in the case of the pure LB film prepared with long-chain azobenzene derivative alone. Thermal cis-to-trans isomerizations in the LB films were also studied.
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