Key Laboratory of Cluster Science of Ministry of Education, School of Chemistry, Beijing Institute of Technology, 100081 Beijing, China.
Chem Commun (Camb). 2013 Jul 7;49(53):5966-8. doi: 10.1039/c3cc41730a.
A conical intersection seam is behind the restriction of intramolecular rotation mechanism for aggregation induced emission in diphenyl dibenzofulvene (DPDBF). In solution, the seam is accessed through rotation around the exocyclic fulvene bond, leading to radiationless decay to the ground state. In the solid, the seam cannot be accessed because the torsion is blocked, and DPDBF becomes emissive.
分子内旋转机制限制了二苯并芴乙烯（DPDBF）的聚集诱导发光，而锥型交叉 seam 就在这一机制的背后。在溶液中，通过环绕非环富烯键的旋转可以进入 seam，从而导致无辐射衰减到基态。在固态中，由于扭转被阻止，seam 无法进入，因此 DPDBF 具有发光性。
