Our study on fast and highly efficient room-temperature phosphorescence in metal-free organic molecular liquids has been published in Chemical Science.
In a collaborative study between our lab and Associate Prof. Tani’s group at Nagoya University, we demonstrated fast and highly efficient room-temperature phosphorescence from metal-free organic molecular liquids. This work has been published in Chemical Science.
In this study, we achieved solvent-free room-temperature phosphorescence by converting a thienyl diketone bearing dimethyloctylsilyl (DMOS) substituents into a liquid state. These molecular liquids exhibited high phosphorescence quantum yields—up to 5.6% in air and up to 25.6% under an argon atmosphere—and were found to possess a large phosphorescence rate constant exceeding 5,000 s⁻¹.
In our laboratory, Mr. Ehara(D3) led transient absorption spectroscopy measurements and analyzed the intersystem crossing process occurring on a timescale of a few picoseconds. This time-resolved insight clarified the photophysical pathway and underlying mechanism of phosphorescence in organic molecular liquids, thereby contributing to a deeper understanding of the photophysics in this system.
“Fast and efficient room-temperature phosphorescence from metal-free organic molecular liquids”
Chem. Sci. 16, 17480-17486 (2025).
