Abstract
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-quinoxalino[2,3-b]phenazine 4, first claimed in 1898 was fully characterized, including an X-ray crystal structure. These heteroacenes have a low calculated singlet-triplet gap and have unusual photophysical properties. ©1999 IUPAC.
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CITATION STYLE
APA
Wudl, F., Koutentis, P. A., Weitz, A., Ma, B., Strassner, T., Houk, K. N., & Khan, S. I. (1999). Polyazaacenes: New tricks for old dogs. Pure and Applied Chemistry, 71(2), 295–302. https://doi.org/10.1351/pac199971020295
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