Ultralong organic room-temperature phosphorescence of electron-donating and commercially available host and guest molecules through efficient Forster resonance energy transfer

作者：Ning, Yeling; Yang, Junfang; Si, Han; Wu, Haozhong; Zheng, Xiaoyan^*; Qin, Anjun^*; Tang, Ben Zhong

来源：Science China Chemistry, 2021, 64(5): 739-744.

DOI：10.1007/s11426-020-9980-4

• room-temperature phosphorescence
• host-guest system
• F&#246
• rster resonance energy transfer
• commercial luminophore
• anti-counterfeiting

Ultralong organic room-temperature phosphorescence (RTP) materials have attracted tremendous attention recently due to their diverse applications. Several ultralong organic RTP materials mimicking the host-guest architecture of inorganic systems have been exploited successfully. However, complicated synthesis and high expenditure are still inevitable in these studies. Herein, we develop a series of novel host-guest organic phosphorescence systems, in which all luminophores are electron-rich, commercially available and halogen-atom-free. The maximum phosphorescence efficiency and the longest lifetime could reach 23.6% and 362 ms, respectively. Experimental results and theoretical calculation indicate that the host molecules not only play a vital role in providing a rigid environment to suppress non-radiative decay of the guest, but also show a synergistic effect to the guest through Forster resonance energy transfer (FRET). The commercial availability, facile preparation and unique properties also make these new host-guest materials an excellent candidate for the anti-counterfeiting application. This work will inspire researchers to develop new RTP systems with different wavelengths from commercially available luminophores.

• 单位
  i; 北京理工大学