The synthesis of a highly twisted chrysene derivative incorporating two electron deficient o‐carboranyl groups is reported. The molecule exhibits a complex, excitation‐dependent photoluminescence, including aggregation‐induced emission (AIE) with good quantum efficiency and an exceptionally long singlet excited state lifetime. Through a combination of detailed optical studies and theoretical calculations, the excited state species are identified, including an unusual excimer induced by the presence of o‐carborane. This is the first time that o‐carborane has been shown to induce excimer formation ab initio, as well as the first observation of excimer emission by a chrysene‐based small molecule in solution. Bis‐o‐carboranyl chrysene is thus an initial member of a new family of o‐carboranyl phenacenes exhibiting a novel architecture for highly‐efficient multi‐luminescent fluorophores.

中文翻译：

---

碳硼烷诱导的严重扭曲双邻碳硼烷基准分子发射

据报道，合成了包含两个缺电子邻碳硼基基团的高度扭曲的衍生物。该分子表现出复杂的、依赖于激发的光致发光，包括聚集诱导发射（AIE），具有良好的量子效率和极长的单线态激发态寿命。通过详细的光学研究和理论计算的结合，确定了激发态物质，包括由邻碳硼烷的存在引起的不寻常的准分子。这是首次证明邻碳硼烷从头开始诱导准分子形成，也是首次观察到基于溶液的小分子的准分子发射。因此，双邻碳硼烷基苯是邻碳硼烷基菲并苯新家族的初始成员，该家族展示了高效多发光荧光团的新颖结构。