title: Head-to-Head Linked Double Calix[4]arenes: Convenient Synthesis and Complexation Properties.
abstract: Combination of calix[4]arenes functionalized at the upper rim at the 5- and 17-positions with amino and formyl groups, respectively, gives a new series of "head-to-head" linked double calix[4]arenes in nearly quantitative yield. The X-ray structure of a modified double calix[4]arene is reported. The novel, highly preorganized receptor molecules complex silver(I) ions (K(ass) = 9.5 x 10(5) M(-)(1) in CDCl(3)); the selectivity of complexation was studied by supported liquid membrane transport experiments and chemically modified field effect transistor measurements.
authors.affiliation: Laboratories of Supramolecular Chemistry and Technology and Chemical Physics, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands.
authors.forename: Oliver
authors.initials: O
authors.lastname: Struck
authors.forename: Lysander A. J.
authors.initials: LA
authors.lastname: Chrisstoffels
authors.forename: Ronny J. W.
authors.initials: RJ
authors.lastname: Lugtenberg
authors.forename: Willem
authors.initials: W
authors.lastname: Verboom
authors.forename: Gerrit J.
authors.initials: GJ
authors.lastname: van Hummel
authors.forename: Sybolt
authors.initials: S
authors.lastname: Harkema
authors.forename: David N.
authors.initials: DN
authors.lastname: Reinhoudt