Chemistry Letters, Vol.32, No.11, 1052-1053, 2003
A duplex of tetra(2-pyridyl)porphyrin and tetrahydroxylcalix[4]arene
meso-Tetra(2-pyridyl)porphyrin forms a duplex with tetrahydroxylealix[4]arene via triplicate or quadruple hydrogen bonds, to provide a capping structure on the porphyrin plane.