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Pyrrolic and polypyrrolic anion binding agents
Authors:Jonathan L Sessler  Salvatore Camiolo and Philip A Gale
Institution:

a Department of Chemistry and Biochemistry, Institute for Cellular and Molecular Biology, The University of Texas at Austin, 1 University Station A5300, Austin, TX 78712-0165, USA

b Department of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, UK

Abstract:This review traces the emergence of pyrrole-based receptors for anion recognition. It outlines how serendipitous findings that the diprotonated form of sapphyrin, a pentapyrrolic expanded porphyrin, formed a centrally-bound complex with fluoride anion made over a decade ago spawned studies of this and other expanded porphyrins as receptors, carriers, and sensors of anions. Further evolutions of the field, including in particular the finding that neutral, non-aromatic oligopyrrole macrocycles, such as the calixpyrroles and calixphyrins, can act as cheap, and easy-to-prepare anion receptors will also be highlighted, as will recent work with acyclic systems, including dipyrrolylquinoxalines (DPQs) and simple derivatives of pyrrole itself.
Keywords:Anion binding  Pyrroles  Oligopyrroles  Expanded porphyrins  Supramolecular chemistry
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