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Abstract A newly prepared tetraazulene‐fused tetracene diimide (TA‐fused TDI) showed absorption in the near‐IR region owing to the effective extension of the π‐conjugated system as well as a large two‐photon absorption cross‐section ( σ (2) =2140 GM) at 950 nm. Four reversible reduction processes and n‐type semiconductivity were also confirmed as attractive electronic properties of this compound.
Koide et al. (2016) studied this question.
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