Cydodextrin receptor

Katz K. T. Ranjit, A photoactivated molecular train for optoelectronic applications light-stimulated translocation of a beta-cydodextrin receptor within a stoppered azobenzone-alkyl chain supramolecular monolayer assembly on a Au-electrode. J. Electro-anal. Chem. 2001, 497, 172-177. 

Calixarenes (from the Latin calix) may be understood as artificial receptor analogues of the natural cydodextrins (96,97). In its prototypical form they feature a macrocyclic metacydophane framework bearing protonizable hydroxy groups made from condensation of -substituted phenols with formaldehyde (Fig. 15b). Dependent on the ring size, benzene derivatives are the substrates most commonly included into the calix cavity (98), but other interesting substrates such as C60 have also been accommodated (Fig. 8c) (45). 

While the previous receptors are typically used in organic solvents, except for the cydodextrins, there are special cases of cydophane receptors supplied with peripheral charges (ammonium units) (107—12) or ionizable groups (carboxylate functions) (113,114) (Fig. 17) to allow substrate recognition, as in nature, in an aqueous medium, profiting from the solvophobic effects of water (115). 

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