The excitation wavelength dependent fluorescence of porphyrins

    Research output: Contribution to journalArticle

    Abstract

    Spectroscopic studies of meso-tetraphenylporphyrin and other meso-substituted porphyrin derivatives have revealed a dual fluorescence emission process. The first emission is the usual 1(p¿p*) transition. The second alternative emission process is proposed to arise following tautomerism of the inner macrocyclic hydrogen atoms via an atom tunnelling process. This process occurs when exciting at virtually all wavelengths in the Q band region but, is at its most intense when exciting at the Qx(0,0) band and is not observed when exciting at the Soret band maximum, i.e., the emission spectrum of TPP is dependent on the excitation wavelength.

    Original languageEnglish
    Pages (from-to)223-228
    Number of pages6
    JournalChemical Physics Letters
    Volume454
    Issue number4-6
    DOIs
    Publication statusPublished - 1 Mar 2008

    Fingerprint

    Porphyrins
    porphyrins
    Fluorescence
    Wavelength
    Atoms
    fluorescence
    wavelengths
    excitation
    Hydrogen
    Derivatives
    hydrogen atoms
    emission spectra
    atoms
    tetraphenylporphyrin

    Keywords

    • fluorescence
    • porphyrins

    Cite this

    @article{797116fcacd248c4881952dac84a38f1,
    title = "The excitation wavelength dependent fluorescence of porphyrins",
    abstract = "Spectroscopic studies of meso-tetraphenylporphyrin and other meso-substituted porphyrin derivatives have revealed a dual fluorescence emission process. The first emission is the usual 1(p¿p*) transition. The second alternative emission process is proposed to arise following tautomerism of the inner macrocyclic hydrogen atoms via an atom tunnelling process. This process occurs when exciting at virtually all wavelengths in the Q band region but, is at its most intense when exciting at the Qx(0,0) band and is not observed when exciting at the Soret band maximum, i.e., the emission spectrum of TPP is dependent on the excitation wavelength.",
    keywords = "fluorescence, porphyrins",
    author = "Mahesh Uttamlal and Holmes-Smith, {A. Sheila}",
    note = "<p>Originally published in: Chemical Physics Letters (2008), 454 (4-6), pp.223-228.</p>",
    year = "2008",
    month = "3",
    day = "1",
    doi = "10.1016/j.cplett.2008.02.012",
    language = "English",
    volume = "454",
    pages = "223--228",
    journal = "Chemical Physics Letters",
    issn = "0009-2614",
    publisher = "Elsevier",
    number = "4-6",

    }

    The excitation wavelength dependent fluorescence of porphyrins. / Uttamlal, Mahesh; Holmes-Smith, A. Sheila.

    In: Chemical Physics Letters, Vol. 454, No. 4-6, 01.03.2008, p. 223-228.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - The excitation wavelength dependent fluorescence of porphyrins

    AU - Uttamlal, Mahesh

    AU - Holmes-Smith, A. Sheila

    N1 - <p>Originally published in: Chemical Physics Letters (2008), 454 (4-6), pp.223-228.</p>

    PY - 2008/3/1

    Y1 - 2008/3/1

    N2 - Spectroscopic studies of meso-tetraphenylporphyrin and other meso-substituted porphyrin derivatives have revealed a dual fluorescence emission process. The first emission is the usual 1(p¿p*) transition. The second alternative emission process is proposed to arise following tautomerism of the inner macrocyclic hydrogen atoms via an atom tunnelling process. This process occurs when exciting at virtually all wavelengths in the Q band region but, is at its most intense when exciting at the Qx(0,0) band and is not observed when exciting at the Soret band maximum, i.e., the emission spectrum of TPP is dependent on the excitation wavelength.

    AB - Spectroscopic studies of meso-tetraphenylporphyrin and other meso-substituted porphyrin derivatives have revealed a dual fluorescence emission process. The first emission is the usual 1(p¿p*) transition. The second alternative emission process is proposed to arise following tautomerism of the inner macrocyclic hydrogen atoms via an atom tunnelling process. This process occurs when exciting at virtually all wavelengths in the Q band region but, is at its most intense when exciting at the Qx(0,0) band and is not observed when exciting at the Soret band maximum, i.e., the emission spectrum of TPP is dependent on the excitation wavelength.

    KW - fluorescence

    KW - porphyrins

    U2 - 10.1016/j.cplett.2008.02.012

    DO - 10.1016/j.cplett.2008.02.012

    M3 - Article

    VL - 454

    SP - 223

    EP - 228

    JO - Chemical Physics Letters

    JF - Chemical Physics Letters

    SN - 0009-2614

    IS - 4-6

    ER -