Ru(II)-centred porphyrin pentamers as coordination building blocks for large porphyrin arrays

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Abstract
Ru(II)-centred porphyrin pentamers have been synthesised with Ni or Zn porphyrins at the peripheral sites; these elaborate systems have been used as building blocks for large porphyrin arrays through their coordination chemistry with bidentate and tetradentate ligands; coordination of a sterically unhindered pentamer to a free-base tetrapyridylporphyrin yields a 21 porphyrin array.