Cationic guests in extended anionic C-methylcalix[4]resorcinarene-inorganic frameworks : exercising conformational control over C-methylcalix[4]resorcinarene

Under acidic conditions and in the presence of appropriate inorganic ions, bipyridyl-type molecules will self-assemble with C-methylcalix[4]resorcinarene to yield a host-guest supramolecular structure in which the resorcinarene adopts the open boat conformation, with the resorcinarene chains linked by the inorganic ions, and bipyridinium-type molecules included as guests that do not interact specifically with the host.NRC publication: Ye