Guest-induced capsular assembly of calix[5]arenes

摘要

novel dimeric capsules are generated from the non-coval entassembly of cone calix[5]arenes and alkyldiammonium ions [H_3N-(CH_2)_n-NH_3_n-NH_3]~(2+)featuring an appropriate length of the spacer joining the two charged end groups.~1H NMR spectroscopy and electrospray ionisation mass spectrometry provide evidence that in the capsule a single ditopic geust holds together a pair of calix[5]arene units,which are oriented rim-to-rimto form a closed cavity encapsulating the shape-complementary dication.