Bis-periazulene (Cyclohepta[def]fluorene) as a Nonalternant Isomer of Pyrene: Synthesis and Characterization of Its Triaryl Derivatives
Bis-periazulene (Cyclohepta[def]fluorene) as a Nonalternant Isomer of Pyrene: Synthesis and Characterization of Its Triaryl Derivatives
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DOI：
10.1021/jacs.2c00476
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发表时间：
2022-03-02
影响因子：
15
通讯作者：
Yasuda, Makoto
中科院分区：
文献类型：
--
作者：
Horii, Koki;Kishi, Ryohei;Yasuda, Makoto
双-perazulene（环庚[def]芴），这是一个未知的芘异构体，合成动力学保护的形式。它的三芳基衍生物1c-e具有外围、极化和开壳π共轭体系的叠加电子结构。与先前的理论预测相反，双-过甘菊环衍生物处于单重基态。改变芳基控制了最低单重态-三重态之间的能隙。
Bis-periazulene (cyclohepta[def]fluorene), which is an unknown pyrene isomer, was synthesized as kinetically protected forms. Its triaryl derivatives 1c-e exhibited the superimposed electronic structures of peripheral, polarized, and open-shell pi-conjugated systems. In contrast to previous theoretical predictions, bis-periazulene derivatives were in the singlet ground state. Changing an aryl group controlled the energy gap between the lowest singlet-triplet states.