Head-to-Head Linked Double Calix[4]arenes: Convenient Synthesis and Complexation Properties.
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.
Struck
Oliver
O
Laboratories of Supramolecular Chemistry and Technology and Chemical Physics, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands.
Chrisstoffels
Lysander A. J.
LA
Lugtenberg
Ronny J. W.
RJ
Verboom
Willem
W
van Hummel
Gerrit J.
GJ
Harkema
Sybolt
S
Reinhoudt
David N.
DN