Influence of interaction of chromophores, linked by the unconjugated chain, on the luminescence properties of biscyanine dyes

N. Kh Ibrayev, A. A. Ishchenko, R. Kh Karamysheva, I. L. Mushkalo

    Research output: Contribution to journalArticle

    17 Citations (Scopus)

    Abstract

    Deactivation of electronically excited state of chemically bound dimers - biscyanines with two chromophores linked by unconjugated chains and corresponding monomer dye was investigated. It was found that the quantum yield of dimer fluorescence is lower than that of a monomer dye. The amount of quantum yield of fluorescence decreases with the increase of chromophores interaction degree (the decrease of the isolating polymethylene bridge length), It is shown on the basis of the external heavy-atom effect studies that the decrease of biscyanines fluorescence ability is connected with the enhancement of singlet-triplet intersystem crossing (S1→T1). It has been established that the probability of the triplet states population in biscyanines with chromophores in parallel arrangement is considerably higher than that in similar compounds with an angular arrangement of chromophores. The delayed fluorescence was observed in the case of dyes with parallel arrangement of chromophores.

    Original languageEnglish
    Pages (from-to)81-88
    Number of pages8
    JournalJournal of Luminescence
    Volume90
    Issue number3
    DOIs
    Publication statusPublished - 1 Jan 2000

    Fingerprint

    Chromophores
    Luminescence
    chromophores
    Fluorescence
    dyes
    luminescence
    Coloring Agents
    fluorescence
    Quantum yield
    Dimers
    interactions
    monomers
    Monomers
    dimers
    Excited states
    deactivation
    atomic energy levels
    BCD cyanine dye
    Atoms
    augmentation

    ASJC Scopus subject areas

    • Biophysics
    • Atomic and Molecular Physics, and Optics
    • Chemistry(all)
    • Biochemistry
    • Condensed Matter Physics

    Cite this

    Influence of interaction of chromophores, linked by the unconjugated chain, on the luminescence properties of biscyanine dyes. / Ibrayev, N. Kh; Ishchenko, A. A.; Karamysheva, R. Kh; Mushkalo, I. L.

    In: Journal of Luminescence, Vol. 90, No. 3, 01.01.2000, p. 81-88.

    Research output: Contribution to journalArticle

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    AU - Mushkalo, I. L.

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