title: Oxidation of Tetraphenylhexaazaanthracene: Accessing a Scissor Dimer of a 16π Biscyanine.
abstract: Tetraphenylhexaazaanthracene (TPHA), a fluorescent zwitterionic biscyanine with a closed-shell singlet ground state, on treatment with manganese dioxide or phenyliodine bis(trifluoroacetate) (PIFA), undergoes oxidative dimerization to give a near-zero dipole scissor 5,5'-dimer DI-TPHA. Both acene components of the new dimer DI-TPHA maintain their biscyanine closed-shell singlet ground state motifs, as judged by analysis of both single crystal X-ray crystallographic and density functional theory computational studies; however, unlike TPHA, DI-TPHA is only very weakly fluorescent.
authors: Department of Chemistry, University of Cyprus , P.O. Box 20537, 1678 Nicosia, Cyprus.
authors: Georgia A
authors: GA
authors: Zissimou
authors: Department of Chemistry, University of Cyprus , P.O. Box 20537, 1678 Nicosia, Cyprus.
authors: Christos P
authors: CP
authors: Constantinides
authors: Department of Chemistry, University of Cyprus , P.O. Box 20537, 1678 Nicosia, Cyprus.
authors: Maria
authors: M
authors: Manoli
authors: Department of Chemistry, University of Cyprus , P.O. Box 20537, 1678 Nicosia, Cyprus.
authors: Galatia K
authors: GK
authors: Pieridou
authors: Department of Chemistry, University of Cyprus , P.O. Box 20537, 1678 Nicosia, Cyprus.
authors: Sophia C
authors: SC
authors: Hayes
authors: Department of Chemistry, University of Cyprus , P.O. Box 20537, 1678 Nicosia, Cyprus.
authors: Panayiotis A
authors: PA
authors: Koutentis