Browsing by Author "Wudl, F."

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    • Article  

      Liquid-crystalline phase behavior in a zwitterionic tetraazapentacene 

      Riley, A. E.; Mitchell, G. W.; Koutentis, Panayiotis Andreas; Bendikov, M.; Kaszynki, P.; Wudl, F.; Tolbert, S. H. (2003)
      A 5,7-dioctadecylquinoxalinophenazine zwitterion 1 has been investigated to determine its thermal phase behavior. A combination of differential scanning calorimetry (DSC), variable temperature low- and high-angle X-ray ...
    • Article  

      Polyazaacenes: New tricks for old dogs 

      Wudl, F.; Koutentis, Panayiotis Andreas; Weitz, A.; Ma, B.; Strassner, T.; Houk, K. N.; Khan, S. I. (1999)
      The evolution of heterocycles from hexaazaanthracene to tetraazapentacenes led to the discovery that syn aza-substituted polyazaacenes possess unusual zwitterionic structures. One of these, 5,7-diphenyl-5H,12H-quinoxalin ...