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SMTP-1: The First Functionalized Metalloporphyrin Molecular Sieves with Large Channels.

Robust hexagonal cavities (dimensions: 17x20x15 Å), encompassed by the pyridyl groups of cyclic metalloporphyrin hexamers (see picture), are the characteristic structural motifs of the nanoporous materials [{M(tpyp)}(6)] small middle dotn G (M=Co, Mn; tpyp=tetrakis(4-pyridyl)porphyrinato; G=guest molecule), which were prepared from MCl(2) and H(2)tpyp under hydrothermal conditions. The rhombohedral crystal lattice with infinite hexagonal channels is thermally stable up to 400 degrees C, even after the removal of the guest molecules.