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Single Crystals of the Disubstituted Anthracene 9,10-(Ph2P[DOUBLE BOND]S)2C14H8 Selectively and Reversibly Detect Toluene by Solid-State Fluorescence Emission


  • This work was supported by the Deutsche Forschungsgemeinschaft (Graduiertenkolleg 690: Elektronendichte) and the Fonds der Chemischen Industrie. We thank Bruker Nonius, Karlsruhe, and CHEMETALL, Frankfurt/Main, for their support.


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Not π stacking but C[BOND]H⋅⋅⋅π-ring center interactions lead to the fluorescence emission observed for the first time from a heteromolecular excimer complex. In single crystals a toluene molecule is located perpendicular to a Ph2P(S)-disubstituted anthracene chromophore. This toluene complex fluoresces (see picture) but the benzene complex does not.

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