Excited state properties of dinaphthyl ditelluride

Di-1-naphthyl ditelluride (Te2naphthyl2) is characterized by two low-energy excited states. The corresponding electronic transitions nTe → σ∗ Te–Te and nTe → π∗ naphthyl CT give rise to absorptions at λmax = 403 and 311 nm, respectively. In solution nTe → σ∗ excitation leads to the cleavage of the Te–Te bond. In contrast to Te2naphthyl2 in the dissolved state the solid compound shows a luminescence (λmax = 576 nm) which originates from nTe → π∗ naphthyl CT triplet.