A redox active polycyclic aromatic hydrocarbon (PAHs) composed of azulene and pyrroles was developed by a research team at Ehime University. This nitrogen-embedded PAH contains two kinds of aromatic rings in the dicationic state which can stabilize cations by delocalization based on global aromaticity. The findings were published on March 5, 2019 in Organic Letters.
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Source: Phys.org