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Donor-Acceptor Triazene Chromophores
D. M. Khramov, C. W. Bielawski*
University of Texas at Austin, USA
23 January 2008 (online)
A series of conjugated triazenes were synthesized in excellent yield by the coupling of an N-heterocyclic carbene (NHC) and an azide. The triazene moiety was shown to be a good electron donor by the bathochromic shift in the absorption maximum upon introduction of a terminal acceptor group on the azide end of the chromophore. Moreover, the triazene moiety was found to act as an efficient bridge for additional donor-acceptor interactions between functional groups on the terminal ends of the chromophore.