Tetrathiafulvalene‐Fused Heterabuckybowl: Protonation‐Induced Electron Transfer and Self‐Sensitized Photooxidation
作者:Lei Liu、Chaoxian Yan、Yecheng Li、Zhe Liu、Chengshan Yuan、Hao‐Li Zhang、Xiangfeng Shao
DOI:10.1002/chem.201905732
日期:2020.6.2
The electron donor tetrathiafulvalene (D1) was fused onto the electron‐rich heterabuckybowl trichalcogenasumanene (D2) through an electron‐deficient pyrazine unit (A) to give 1 c , 1 d , 2 c , and 2 d , featuring the D1–A–D2 structure. Both D1 and D2 play a pivotal role in intramolecular charge‐transfer (ICT) transitions, consequently 1 c , 2 d , 2 c , and 2 d show a broad ICT band at 450–720 nm in
将电子给体四硫富瓦烯(D 1)通过缺电子的吡嗪单元(A)融合到富电子的杂巴三氯三亚苏曼烯(D 2)上,得到1 c,1 d,2 c和2 d,其特征为D 1 –A–D 2结构。D 1和D 2都在分子内电荷转移(ICT)跃迁中起关键作用,因此1 c,2 d,2 c和2 d在稳定状态下在450-720 nm处显示宽的ICT带。它们表现出两个电荷分离的瞬态CS1和CS 2依次出现。CS 1具有短的寿命(542个FS),以及d 1上CS部分1是在其最大吸收(自由基阳离子状态λ最大)在889纳米。CS 1然后转换成CS 2(λ最大,1105纳米)通过d之间的ICT 1 。+和d 2,得到d 1 (1- δ)。+和d 2 δ。+。化合物1 c,1 d,2 c和2 d显示质子化诱导的分子内电子转移,导致在λ = 700–1300 nm处吸收。由于D 1部分上存在富电子的C = C键,并且吡嗪融合的D 2部分原位生成1