Phenanthrodiazaporphyrins: 1,10-Phenanthroline-Embedded Diazaporphyrin Analogues

A series of metal-free and metallo-diazaporphyrin analogues embedded with a 1,10-phenanthroline unit were synthesized and characterized. The molecular structure of the Ni(II) complex determined by single-crystal X-ray diffraction analysis confirmed its monocationic character in which the metal center adopts a typical square planar geometry binding with the pyrrole and phenanthroline nitrogen atoms. The spectroscopic and electrochemical studies, as well as molecular orbital calculations suggested that the metal complexes can be classified as 4nπ non-aromatic compounds. A series of metal-free and metallo-diazaporphyrin analogues embedded with a 1,10-phenanthroline unit have been synthesized and characterized. The spectroscopic and electrochemical studies, as well as molecular orbital calculations suggest that the metal complexes can be classified as 4nπ non-aromatic compounds.