Fluorescence emission of disperse red 1 in solution at room temperature

    Authors

    C. Toro; A. Thibert; L. De Boni; A. E. Masunov;F. E. Hernandez

    Comments

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    Abbreviated Journal Title

    J. Phys. Chem. B

    Keywords

    AZO COMPOUNDS; PHOTOISOMERIZATION; AZOBENZENE; ISOMERIZATION; DERIVATIVES; ABSORPTION; MOLECULES; MECHANISM; DYNAMICS; SPECTRA; Chemistry, Physical

    Abstract

    In this article, we report the fluorescence emission of Disperse Red I in solution at room temperature and pumping at 532 nm with a 25 mW diode laser. We have measured its fluorescence quantum yield in methanol, ethylene glycol, glycerol, and phenol obtaining values as high as 10(-3) in the aliphatic alcohols. The excitation spectra of Disperse Red I in all four solvents as well as its excitation anisotropy in glycerol are presented. Applying a Gaussian decomposition method to the absorption spectra along with the support from the excitation spectra, the positions of the different transitions in this pseudo-stilbene azobenzene dye were determined. Solvatochromic and isomerization constraint effects are discussed. Calculations using density functional theory at TD-B3LYP/6-31G*//HF/6-31G* level were performed to interpret the experimental observations.

    Journal Title

    Journal of Physical Chemistry B

    Volume

    112

    Issue/Number

    3

    Publication Date

    1-1-2008

    Document Type

    Article

    Language

    English

    First Page

    929

    Last Page

    937

    WOS Identifier

    WOS:000252484200038

    ISSN

    1520-6106

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