Structure of a 4:1:4 Supramolecular Assembly of Neutral TiiiiPO Cavitands and Tetrakis(N-methylpyridinium)porphyrin Iodide

摘要

Four tetraphosphorylated TiiiiPO cavitands 1 encapsulate the pyridinium heads of a tetrakis(N-methylpyridinium)porphyrin iodide to form a 4:1:4 (host)_4/guest~(4+)/4I~- complex. The single-crystal X-ray diffraction analysis shows the arrangement of the four cavities bound to the CH_3N~+ groups of the porphyrin moiety and the four iodide anions nested between the phenethyl substituents of the hosts. ~1H NMR investigations show that the structure is preserved in chloroform solution and underscore the effect of the counteranions.