Herein we report the first examples of N-polyaromatic compounds bearing up to 13 fused aromatic rings, including 23H-benzo[12,1]tetrapheno[8,9-b]benzo[12,1]tetrapheno[9,8-h]carbazole derivative. Selanyl and tellanyl electrophiles reaction with ethynyl biphenyls through 6-endo-dig closure...

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The solid solutions of the novel platinum complexes bearing pyridyl benzo[b]selenophenes moieties emitted efficient green and red phosphorescence with absolute quantum yields of 52% (for green) and 11.6% (for red).

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