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Molecular Recognition by Self-Assembled Monolayers of Cavitand Receptors
K. D. Schierbaum, T. Weiss, E. U. Thoden van Velzen, J. F. J. Engbersen, D. N. Reinhoudt and W. Göpel
New Series, Vol. 265, No. 5177 (Sep. 2, 1994), pp. 1413-1415
Published by: American Association for the Advancement of Science
Stable URL: http://www.jstor.org/stable/2884822
Page Count: 3
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It is shown by angle-resolved x-ray photoelectron spectroscopy that cavitands derived from resorcinarenes provided with four dialkylsulfide chains form stable monolayers on gold surfaces that are well organized by self-assembly. The cavitand headgroups at the surface of the resorcinarene monolayer act as molecular recognition sites for small organic molecules with remarkable selectivity for perchloroethylene (C$_2$Cl$_4$). Comparative thermal desorption experiments indicate binding sites with high interaction energies of C$_2$Cl$_4$ at the surface of the resorcinarene monolayers. Fast and reversible "host-guest" interactions were found by the monitoring of extremely small mass changes (in the nanogram range) with a quartz microbalance oscillator provided with gold electrodes coated by resorcinarene monolayers.
Science © 1994 American Association for the Advancement of Science