Kinetic control of the supramolecular chirality of porphyrin J-aggregates

Alessandro Sorrenti, Zoubir El-Hachemi, Oriol Arteaga, Adolf Canillas, Joaquim Crusats, Josep M. Ribo

    Research output: Contribution to journalArticleResearchpeer-review

    25 Citations (Scopus)

    Abstract

    The aggregation of achiral sulfonatophenyl- and phenyl-meso-substituted diprotonated porphyrins to chiral J-aggregates is a hierarchical noncovalent polymerization process preceded by a critical nucleation stage. This allows significant enantiomeric excesses by the formation of a few primary nuclei and the control of their growth by the effect that flows (imperfect mixing) have on the secondary nucleation of the J-aggregate particles. In addition, the results strongly suggest that when only one species of aggregate predominates, the CD signals of the three excitonic bands in the visible region (around 420, 490, and 700 nm) show the same sign. Thus, differences on their relative sign would be due to the presence of different species. Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
    Original languageEnglish
    Pages (from-to)8820-8826
    JournalChemistry - A European Journal
    Volume18
    Issue number28
    DOIs
    Publication statusPublished - 9 Jul 2012

    Keywords

    • chirality
    • circular dichroism
    • porphyrinoids
    • self-assembly
    • supramolecular chemistry

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