What is it about?
Sterically congested tetraarylpyrenes exhibited emission in both solution and the solid-state. The monocationic species of pyrene 1 could be isolated because of the reasonably protected system.
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Why is it important?
The aromaticity relocates from the biphenyl part to the naphthalene unit upon two-electron oxidation.
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This page is a summary of: A kinetically protected pyrene: molecular design, bright blue emission in the crystalline state and aromaticity relocation in its dicationic species, Chemical Communications, January 2014, Royal Society of Chemistry, DOI: 10.1039/c4cc03645j.
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