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All-Aza meso-Benzo-Fused Triphyrins(2.1.1): Large Bathochromic Shift and Intensified Absorption via π-Extended
Ishfaq A Bhat1, Subhalaxmi Panda1, Narendra N Pati1
1School of Chemistry, University of Hyderabad, Hyderabad 500046, India.
None:
The topology that would be dependent on the effectiveness of π-electron coupling is significantly tuned by the strong conjugation that exists in fused systems. Side or linear fusion of unsaturated and conjugated hydrocarbons can have a significant effect on the π-electron cloud that is accessible in the final structure. The syntheses of three all-aza benzene-annulated triphyrins(2.1.1) were revealed. Because of the π extension, the lowest-energy Q band is not only red-shifted by more than 100 nm but also intensified to a great extent, indicating 18π-aromatic characteristics.
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