Lei Gao - Gold(I) Styrylbenzene, Distyrylbenzene, and Distyrylnaphthalene Complexes: High Emission Quantum Yields at Room Temperature

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      Publication Details (including relevant citation   information):

      Chemistry-A European Journal, 2012, 18, 6316-6327

      Abstract:

        One gold(I)-substituted styrylbenzene, six digold(I)   distyrylbenzenes, one tetragold distyrylbenzene, and four digold   distyrylnaphthalene complexes were synthesized using   base-promoted auration, alkynylation, triazolate formation, and   Horner–Wadsworth–Emmons reactions. The gold(I) fragments are   either σ-bonded to the aromatic system, or they are attached   through an alkynyl or triazolate spacer. Product formation was   monitored using   31P{1H}   NMR spectroscopy. Systems in which gold(I) binds to the central   benzene ring or the terminal phenyl rings were designed. All of   these complexes have strong ultraviolet absorptions and emit blue   light. The position of the gold(I) attachment influences the   luminescence efficiency. Complexes with two gold(I) fragments   attached to the ends of the conjugated system have fluorescence   quantum yields up to 0.94, when using   7-diethylamino-4-methylcoumarin as the emission standard.   Density-functional theory calculations on three high-yielding   emitters suggest that luminescence originates from the   distyrylbenzene or -naphthalene bridge.

      Address (URL): http://onlinelibrary.wiley.com/doi/10.1002/chem.201102502/abstract