Singlet oxygen quantum yield determination for a fluorene-based two-photon photosensitizer

    Authors

    K. D. Belfield; M. V. Bondar;O. V. Przhonska

    Comments

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    Abbreviated Journal Title

    J. Fluoresc.

    Keywords

    singlet oxygen; photosensitizer; two-photon; fluorene; PHOTODYNAMIC THERAPY; TRIPLET-STATES; PHOTOCHEMICAL PROPERTIES; MOLECULAR-OXYGEN; CHARGE-TRANSFER; DERIVATIVES; GENERATION; SENSITIZERS; ABSORPTION; SOLVENTS; Biochemical Research Methods; Chemistry, Analytical; Chemistry, Physical

    Abstract

    The quantum yield, Phi(Delta), of singlet oxygen generation under two-photon excitation has been determined for a fluorene derivative. A photochemical method was developed using 1,3-diphenylisobenzofuran ( DPBF), a chemical quencher of O-1(2), and 2-(9,9-didecyl-7-nitrofluoren-2-yl) benzothiazole ( 1) as a two-photon photosensitizer ( PS). The photochemical kinetics of the quencher was measured by two different fluorescence methods. Fluorene 1 exhibited relatively high singlet oxygen quantum yield, Phi(Delta) approximate to 0.4 +/- 0.1, and had a two-photon absorption cross-section of 28 +/- 5 GM. Thus, 1 may have potential for use as a two-photon PS in the near-IR spectral region for biomedical applications.

    Journal Title

    Journal of Fluorescence

    Volume

    16

    Issue/Number

    1

    Publication Date

    1-1-2006

    Document Type

    Article

    Language

    English

    First Page

    111

    Last Page

    117

    WOS Identifier

    WOS:000236646200016

    ISSN

    1053-0509

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