Synthesis of a New Calix[4]crown-5-azacrown-5 Dimeric Nano-Tube.

Korea Institute of Science and Technology, Seoul 136-791, KoreaReceived April 30, 2004Key Words : Calixarene, Azacrown, Nano-tube, SynthesisCalix[4]arenes as cation receptors have received muchattention because of their easy functionalization and specialgeometries when functional groups are incorporated intoeither or both the lower or the upper rim of the calixarenes.