The pyrene‐tethered carborane CBEP, which exhibited rapid and dramatic luminochromism, was synthesized. Based on optical measurements, we found that CBEP exhibited orange emission at room temperature, which was caused by intramolecular charge transfer in the solid state, and green excimer emission at 77 K. We proposed that excimer formation could be encouraged by introducing a small amount of steric hindrance with an ethynyl spacer group. We found that o‐carborane could suppress aggregation‐caused quenching without the inhibition of excimer formation because of this steric hindrance.

中文翻译：

---

固态热致变色发光通过扭曲的分子内电荷转移和带有乙炔基间隔基的碳硼烷-Dy二聚体的准分子形成。

合成了rapid束缚的碳硼烷CBEP，它表现出快速而显着的发光变色现象。根据光学测量，我们发现CBEP在室温下会显示橙色发射，这是由于固态分子内电荷转移引起的，而在77 K下则显示绿色准分子发射。我们建议通过引入少量的CBEP可以促进准分子的形成。带有乙炔基间隔基的空间位阻。我们发现，由于这种空间位阻，邻碳硼烷可以抑制聚集引起的猝灭，而不会抑制受激准分子的形成。