Transition-metal complexes of expanded porphyrins

Jonathan L. Sessler, Elisa Tomat

Research output: Contribution to journalArticlepeer-review

137 Scopus citations


Over the last 2 decades, the rapid development of new synthetic routes for the preparation of expanded porphyrin macrocycles has allowed for the exploration of a new frontier consisting of "porphyrin-like" coordination chemistry. In this Account, we summarize our exploratory forays into the still relatively poorly explored area of oligopyrrolic macrocycle metalation chemistry. Specifically, we describe our successful formation of both mono- and binuclear complexes and, in doing so, highlight the diversity of coordination modes available to expanded porphyrin-type ligands. The nature of the inserted cation, the emerging role of tautomeric equilibria, and the importance of hydrogen-bonding interactions in regulating this chemistry are also discussed.

Original languageEnglish (US)
Pages (from-to)371-379
Number of pages9
JournalAccounts of Chemical Research
Issue number5
StatePublished - May 2007

ASJC Scopus subject areas

  • Chemistry(all)


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