How π Extension or Structural Bending Alters the Properties of Boron-Doped Phenylene-Containing Oligoacenes
作者:Sven Kirschner、Ise Uecker、Michael Bolte、Hans-Wolfram Lerner、Matthias Wagner
DOI:10.1021/acs.organomet.9b00330
日期:2019.7.22
π-extended DBI congener (e-DBI), in which two 2,3-benzo[b]biphenylenediyl moieties are linearly annulated to the central B2C4 ring and behaves partly similar to DBI: it is a strong electron acceptor and has a deep red color. In contrast to the nonluminescent DBI, it shows red fluorescence (quantum yield: 12%), which changes to blue-green upon addition of excess F–-ions. In the presence of 0.4 equiv of
通过其碳原子将两个2,3-联苯二基基团线性环合到1,4-二硼酸酯-2,5-环己二烯核上,得到了掺硼的含亚苯基少并苯(B-POA)DBI。DBI的光电性质不同于相关的硼掺杂多环芳烃(B-PAHs),例如6,13-二氢-6,13-二硼戊并五烯(DBP)。在这里,我们公开了两个新的B-POA,它们提供了对基本结构-属性关系的深入了解。第一个是π扩展的DBI同系物(e- DBI),其中两个2,3-苯并[ b ]联苯二烯基部分线性地环合到中心B 2 C 4环上,其行为部分类似于DBI:它是强电子受体,具有深红色。与此相反的不发光DBI,它示出了红色荧光(量子产率:12%),其在加入过量的F变为蓝绿色- -离子。在F - 0.4当量的条件下,观察到几乎白色的发射(CIE1931:(0.3320 | 0.4056))。如果联苯二甲酰基部分通过其1,2-位角连接到B 2 C 4环,则所得的“ v”形和“