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Chemphyschem. 2007 Sep 17;8(13):1929-36.

Single dibenzoterrylene molecules in an anthracene crystal: main insertion sites.

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  • 1MoNOS, Huygens Laboratory, Leiden University, 2300 RA, Leiden, The Netherlands.


We present a spectroscopic study of the properties of the two principal insertion sites (at 785.1 and 794.3 nm) of single dibenzoterrylene molecules in anthracene single crystals at cryogenic temperatures. We measured the temperature dependence of the line width, the orientation of the transition dipole moments, and the Stark effect. We performed molecular dynamics simulations, which show that one dibenzoterrylene molecule preferably replaces three anthracene molecules. From simulated annealing, we derive the molecular conformations in the most stable insertion sites and the orientations of the transition dipole moments. The good agreement between the spectroscopic results and the simulations allows us to propose unambiguous structures for the two principal spectroscopic sites.

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