Combination of calixarenes 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 calixarenes in nearly quantitative yield. The X-ray structure of a modified double calixarene is reported. The novel, highly preorganized receptor molecules complex silver(I) ions (Kass = 9.5 × 105 M-1 in CDCl3); the selectivity of complexation was studied by supported liquid membrane transport experiments and chemically modified field effect transistor measurements.
Struck, O., Chrisstoffels, L. A. J., Lugtenberg, R. J. W., Verboom, W., van Hummel, G. J., Harkema, S., & Reinhoudt, D. N. (1997). Head-to-head linked double calixarenes: convenient synthesis and complexation properties. Journal of organic chemistry, 62(8), 2487-2493. https://doi.org/10.1021/jo962138z