Although many room temperature phosphorescence host–guest systems with versatile performances have been developed, their photophysical mechanisms remain often unclear. Here the authors reveal that a dynamic coupling process in the excited state is crucial for inducing phosphorescence, where host and guest molecules firstly couple to enhance the intersystem crossing efficiency, and then decouple to transfer excitons to the triplet state of guest.
- Xin Li
- Wenlang Li
- Ben Zhong Tang
