Ratiometry of monomer/excimer emissions of dipyrenyl calix[4]arene in aqueous media

Hyun Jung Kim, Duong Tuan Quang, Jooyeon Hong, Guipeun Kang, Sihyun Ham, Jong Seung Kim

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    19 Citations (Scopus)

    Abstract

    Variations in the ratio of monomer/excimer emissions from pyrenyl groups bound to a calix[4]arene through facing carboxamidomethyl substituents have been investigated in H2O/CH3CN mixtures. Above a level of 50% H2O, monomer emission declines and the excimer emission concomitantly increases. DFT calculations support the argument that disruption of intramolecular NHO bonds by water results in a geometry, which favors contact of the pyrene units and thus a strong excimer emission. Addition of Fe(III) to a H2O/CH3CN (4:1, v/v) solution of 1 at pH 6.1 quenches both monomer and excimer emissions through electron transfer (eT) from excited pyrene to the metal ion.

    Original languageEnglish
    Pages (from-to)10788-10792
    Number of pages5
    JournalTetrahedron
    Volume63
    Issue number44
    DOIs
    Publication statusPublished - 2007 Oct 29

    Bibliographical note

    Funding Information:
    This work was supported by the SRC Research centre for Women's Diseases of Sookmyung Women's University.

    ASJC Scopus subject areas

    • Biochemistry
    • Drug Discovery
    • Organic Chemistry

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