杂原子取代对π-扩展螺旋烯激发态动力学的影响。

Kondo Yuto, Tsutsui Yusuke, Matsuo Yusuke, Tanaka Takayuki, Seki Shu

Department of Molecular Engineering, Graduate School of Engineering, Kyoto University Nishikyo-ku Kyoto 615-8510 Japan

JST-PRESTO Honcho 4-1-8, Kawaguchi Saitama 332-0012 Japan.

Nanoscale Adv. 2024 Aug 1;6(18):4567-71. doi: 10.1039/d4na00516c.

Benzo-annulated aza[9]helicene ([9]AH) and thia[9]helicene ([9]TH) were prepared as novel π-extended heterohelicenes. [9]TH showed a quite short fluorescence lifetime of ∼0.3 ns and intense phosphorescence at low temperature that were attributed to its larger spin-orbit coupling and faster intersystem crossing between pseudo-degenerate S and triplet states.

苯并稠合氮杂[9]螺烯（[9]AH）和硫杂[9]螺烯（[9]TH）被制备为新型的π-扩展杂螺烯。[9]TH表现出相当短的荧光寿命，约为0.3纳秒，并且在低温下有强烈的磷光，这归因于其较大的自旋-轨道耦合以及在准简并单重态和三重态之间更快的系间窜越。