Frontispiece: EPR Studies of the Binding Properties, Guest Dynamics, and Inner-Space Dimensions of a Water-Soluble Resorcinarene Capsule

International audience; Host-Guest Systems After extensive work toward the creation of molecular capsules in which two cavitands self-assemble to produce a constricted space amenable to guest encapsulation, a water-soluble version of Rebek's capsules was recently introduced. By combining EPR and NMR spectroscopy and ESI-MS, O. Ouari and co-workers have investigated the inner space metrics (width and height) of these supramolecular objects in water, as well as their binding constants and guest rotational dynamics. Nitroxides have been shown to be powerful probes affording a wealth of information. Read more in the Full Paper on page 16404 ff.