Non-Covalent Supramolecular Donor-Acceptor Arrays With Nanocarbon Materials for Light-Harvesting

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Porphyrins and their analogues are well-known "pigments of life", which are involved in light-harvesting, oxygen transfer, and transformation of biological substrates. A variety of synthetic porphyrins have been studied as artificial light-harvesting materials with the best system providing >13% efficiency in the solar light-to-electricity conversion. Ferrocene-containing porphyrins, borondipyrromethenes (BODIPYs), and boronazadipyrromethenes (aza-BODIPYs) are prominent candidates for light-harvesting. Efficient use of such compounds in organic photovoltaics (OPV) requires non-covalent attachment of these molecules to the electron-acceptors such as fullerenes, nanotubes, and graphene. The pyrene group can facilitate such desired non-covalent interactions with nanocarbon materials.