Tetra(3-pyridyl)porphyrazine has been modi®ed with four peripheral [Ru(bipy)2CI]
groups, yielding a novel, dark green supramolecular
species. The spectroscopic and electrochemical properties of the tetraruthenated porphyrazine have indicated a signi®cant electronic
interaction between the central and peripheral groups. In addition, ¯uorescence emission from the porphyrazine center has been observed at
room temperature either by direct excitation at the Soret and Q bands, or by excitation at the peripheral ruthenium±bipyridine complexes,
evidencing an ef®cient antenna effect. The generation of 1O2 species from the porphyrazine excited triplet states has also been
demonstrated. # 1998 Elsevier Science S.A. All rights rese