Dimeric Assemblies of Calixarenes

The linear bi- and tri-phenolic oligomers formed in the condensation of p-tert-butylphenol and formaldehyde i.e. the precursors to calixarenes) have been shown to form intermolecular associated dimers even at concentrations lower than 10 These have been called hemicalixarenes (see ref. 1, pp. 53-54) and presumably play a significant role in the proclivity of the linear oligomers to form cyclic oligomers. 

Tymoschenko, M. Valdez, C. Wintner, E. Wyler, R. Rebek, J., Jr. Pure Appl. Chem. 1993, 65, 

The 1992 attempt to create a calixarene dimer from 285b vide supra) resulted primarily in the formation of a polymeric assembly in CDCI3 solution which 

While a monolayer of the parent calix[6]arene shows a selective response to Cs (which increases the parallel orientation), the hexaamide shows a selective response to guanidinium ion, Similar results are reported for 8 and its derived ester 264 (R = 1,1,3,3-tetramethylbutyl R = Et) and amide, where the order of selection for cations is Cs Rb Na K and for anions is 1 F Br Monolayers prepared from 8 and the fullerenes 

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