Electronic Energy Transfer on Fractals

Abstract

We advance an experimental method for the characterization of the geometric site distribution of a fractal structure, which rests on the interrogation of direct, long-range, singlet-singlet, intermolecular, electronic energy transfer. Time-resolved picosecond spectroscopy was utilized to study energy transfer from rhodamine B to malachite green doped into a porous glass, resulting in a fractal dimension of $\overline{d}=1.74\mathrm{}\pm 0.12$ for this irregular structure.