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Keywords:

  • subporphyrazine;
  • subphthalocyanine;
  • aromaticity;
  • delocalized circuit;
  • density functional theory

Abstract

Density functional theory method was employed to investigate the electronic properties of two series of subporphyrazine and subphthalocyanine derivatives, namely SubPz, SubPz-1H, SubPz-2H, SubPz-3H, SubPc, SubPc-1H, SubPc-2H, and SubPc-3H. Calculated results show that peripheral hydrogenation essentially changes the delocalized pattern from the common π1414 to limited π1314 or π1214 for SubPz series, and substantially weakens the aromaticity for both SubPz and SubPc compounds. The unordinary delocalized circuit owns an unstable energy level, and thus gives rise to a notable transformation of geometric configuration, frontier molecular orbital topology, and absorption spectral bands.