Triplet-Triplet Annihilation via the Triplet Channel in Crystalline 9,10-Diphenylanthracene

被引：10
|
作者：
Yago, Tomoaki [1 ]
Tashiro, Manami [1 ]
Hasegawa, Kiichi [1 ]
Gohdo, Masao [2 ]
Tsuchiya, Syuta [3 ]
Ikoma, Tadaaki [3 ]
Wakasa, Masanobu [1 ]
机构：
[1] Saitama Univ, Grad Sch Sci & Engn, Dept Chem, Saitama 3388570, Japan
[2] Osaka Univ, SANKEN Inst Sci & Ind Res, Osaka 5670047, Japan
[3] Niigata Univ, Grad Sch Sci & Technol, Niigata 9502181, Japan
来源：
JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2022年 / 13卷 / 37期
关键词：
PHOTON UP-CONVERSION; MAGNETIC-FIELD; DELAYED FLUORESCENCE; SINGLET FISSION; LOW-POWER; PAIR; FUSION;
D O I：
10.1021/acs.jpclett.2c01839
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Delayed fluorescence resulting from triplet-triplet annihilation in crystalline 9,10-diphenylanthracene was observed by means of steady-state fluorescence measurements under magnetic fields of <= 10 T. At five specific magnetic fields, four peaks and one dip in the magnetic field dependence of fluorescence intensity were observed, proving that exchange-coupled triplet pairs were generated in the course of triplet-triplet annihilation. The dip was in the opposite direction predicted for singlet channel triplet-triplet annihilation. Further analysis using the stochastic Liouville equation confirmed that the closest exchange-coupled triplet pair in crystalline 9,10-diphenylanthracene is quenched via both triplet channel and singlet channel triplet-triplet annihilation.
引用
收藏
页码：8768 / 8774
页数：7
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