Synthesis and self-assembly of a novel tetrapyrrole containing dipyrrin units linked at the 3,3′-positions

A novel ligand comprising two dipyrrin units linked by a CH2 spacer at the 3-position has been synthesized and used to prepare a double-stranded helical assembly. Its structure was confirmed by X-ray analysis. A new approach to 3,3′-linked dipyrromethanes with CH2 as the spacer is also reported.