• V K Indirapriyadharshini

      Articles written in Journal of Chemical Sciences

    • Fluorescence anisotropy of acridinedione dyes in glycerol: Prolate model of ellipsoid

      V K Indirapriyadharshini P Ramamurthy

      More Details Abstract Fulltext PDF

      Time-dependent reorientations of resorcinol-based acridinidione (ADR) dyes in glycerol were studied using steady-state and time-resolved fluorescence studies. The difference between fluorescence anisotropy decays recorded at 460 nm when exciting at 250 nm and those obtained when exciting at 394 nm are reported. When exciting at 394 nm, the fluorescence anisotropy decay is bi-exponential, while on exciting at 250 nm a mono-exponential fluorescence anisotropy decay is observed. We interpret this in terms of different directions of the absorption dipole at 394 and 250 nm with the emission dipole respectively, which is experimentally validated and further analysed as a prolate model of ellipsoid.

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