Subplcosecond Time-Resolved Intramolecular Electronic Energy Transfer in Flexible Blchromophorlc Coumarin Molecules
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چکیده
By excite-and-probe spectroscopy with subpicosecond time resolution, we have measured the intramolecular electronic energy transfer in bichromophoric coumarins linked by a flexible polymethylene chain. The transfer proceeds on a time scale between 1 and 20 ps depending on the polymethylene chain length. The results can be well described by a dipole-dipole interaction model that takes into account the statistical distribution of intramolecular distances between the two chromophores.
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تاریخ انتشار 2001