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Effectively increasing the length of N ‐heteroacenes is highly desirable because such materials could have great potential applications in organic optoelectronics. In this review we summarize the recent progress in the construction of larger N ‐heteroacenes based on the use of phenazinediamine and its analogues as building blocks to react with different kinds of ortho ‐diketones (or tetraketones) or ortho ‐dihalides through condensation or coupling reactions. In addition, the potential applications of the corresponding N ‐heteroacenes are also presented.
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Li et al. (2018) studied this question.
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