首页|Amorphous pure organic phosphorescent host-guest complexes with ultralong phosphorescence lifetime and high-temperature tolerance
Amorphous pure organic phosphorescent host-guest complexes with ultralong phosphorescence lifetime and high-temperature tolerance
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NSTL
It is still a meaningful and challenging task to prepare ultralong-lived(phosphorescence lifetime τp>100 ms)pure organic phosphorescence materials emitting at room temperature,let alone at high temperature(e.g.100 ℃).Herein,l-methyl-4-phenylpyridin-l-ium salts(PMX,X = CI,PF6,Br and I)without afterglow are tightly encapsulated into the cavity of phCB[6](a CB[6] derivative)to form amorphous ultralong-lived host-guest I phosphorescence complexes PMCl/phCB [6](1.57 s),PMPF6/phCB [6](1.35 s)and PMBr/phCB[6](0.51 s)with green afterglow lasting for 9-10 s under ambient conditions.More importantly,the green phosphorescence is still visible to the naked eyes even at 100 ℃,exhibiting excellent high-temperature tolerance.Such an encapsulation strategy for obtaining high-temperature phosphorescent materials has not been reported yet and would pave a new road for its further applications.
Key Laboratory for Advanced Materials,Joint International Research Laboratory of Precision Chemistry and Molecular Engineering,Feringa Nobel Prize Scientist Joint Research Center,Frontiers Science Center for Materiobiology and Dynamic Chemistry,Institute of Fine Chemicab,School of Chemistry and Molecular Engineering,East China University of Science and Technology,Shanghai,200237,China
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