Title of article :
Fluorescence depolarisation from 2,5,8,11-tetra-t-butylperylene globally analysed upon excitation in S1 and Sn
Author/Authors :
De Backer، نويسنده , , Steven and Negri، نويسنده , , Martin R. and De Feyter، نويسنده , , Steven and Bhaskar Dutt، نويسنده , , G. and Ameloot، نويسنده , , Marcel and De Schryver، نويسنده , , Frans C. and Müllen، نويسنده , , Klaus and Holtrup، نويسنده , , Frank، نويسنده ,
Abstract :
The rotational dynamics of perylene and tetra-tertiary butylperylene are investigated by means of time-resolved fluorescence anisotropy experiments. In the global analysis of the polarised fluorescence decay traces, the preexponential factors in the anisotropy decay are linked over a series of n-alcohols while the rotational correlation times are linked over two excitation wavelenghts. This approach allows for a high model discrimination power. The anisotropy decay of perylene could be analysed using a biexponential decay law with a fast in-plane and a slower out-of-plane rotation. By substituting perylene symmetrically by four tertiary butyl groups the two rotational correlation times become equal, resulting in a monoexponential anisotropy decay.
