Photostability of a series of two-photon absorbing fluorene derivatives

    Authors

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

    Comments

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    Abbreviated Journal Title

    J. Photochem. Photobiol. A-Chem.

    Keywords

    fluorene derivatives; photochemical quantum yield; photostability; photooxidation; EXCITATION; PHOTON; DYES; Chemistry, Physical

    Abstract

    The photochemical stability of a series of two-photon absorbing (TPA) fluorene derivatives was investigated in air- and N-2-saturated acetonitrile (ACN) at room temperature. The quantum yields of the photoreactions, Phi, were determined at various concentrations of the fluorene derivatives, oxygen concentration of the solvent, and irradiation wavelength. The absorption and fluorescence spectra of the photoproducts, corresponding to different excitation conditions, were analyzed. Photooxidation and electron transfer processes are proposed as photobleaching mechanisms for the fluorene derivatives in ACN. The relatively low photochemical quantum yields (Phi similar to 10(-4)) make the derivatives particularly promising for linear and nonlinear optical applications. (C) 2004 Elsevier B.V. All rights reserved.

    Journal Title

    Journal of Photochemistry and Photobiology a-Chemistry

    Volume

    162

    Issue/Number

    2-3

    Publication Date

    1-1-2004

    Document Type

    Article

    Language

    English

    First Page

    489

    Last Page

    496

    WOS Identifier

    WOS:000220468500032

    ISSN

    1010-6030

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