Energy Transfer in Molecular Crystals and Its Influence on Spin Resonance
In the past ten years, excitation transfer processes between molecules in condensed phases have been studied in a variety of systems and by a number of methods. However, the naphthalene dimer systems first studied experimentally by Schwoerer and Wolf  and theoretically by Haken and Reineker  remain the most beautiful model system for these processes. The elegant electron spin echo (ESE) experiments of van der Waals, Schmidt and coworkers  on this system were the final word on the experimental side, at least at low temperatures; however, there are still a few theoretical loose ends to clear up, as discussed recently by Schmid and Reineker . In this paper, I discuss these model systems, focussing on the ESE experiments.
KeywordsTriplet State Reduce Density Matrix Dime State Electron Spin Echo Triplet Exciton
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