期刊
SCIENCE CHINA-CHEMISTRY
卷 64, 期 5, 页码 739-744出版社
SCIENCE PRESS
DOI: 10.1007/s11426-020-9980-4
关键词
room-temperature phosphorescence; host-guest system; Fö rster resonance energy transfer; commercial luminophore; anti-counterfeiting
资金
- National Natural Science Foundation of China [21788102, 21525417]
- Natural Science Foundation of Guangdong Province [2019B030301003, 2016A030312002]
- Innovation and Technology Commission of Hong Kong [ITC-CNERC14S01]
A series of novel host-guest organic phosphorescence systems have been developed with high phosphorescence efficiency and long lifetime, making them excellent candidates for anti-counterfeiting applications.
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.
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