Amplification of Circularly Polarized Luminescence through Triplet Triplet Annihilation-Based Photon Upconversion

被引：219

作者：

Han, Jianlei ^{[1
,2
]}

Duan, Pengfei ^{[2
]}

Li, Xianggao ^{[1
]}

Liu, Minghua ^{[2
,3
]}

机构：

[1] Tianjin Univ, Sch Chem Engn & Technol, Tianjin 300072, Peoples R China

[2] Natl Ctr Nanosci & Technol NCNST, CAS Ctr Excellence Nanosci, Div Nanophoton, CAS Key Lab Nanosyst & Hierarch Fabricat, 11 ZhongGuanCun BeiYiTiao, Beijing 100190, Peoples R China

[3] Chinese Acad Sci, Inst Chem, CAS Key Lab Colloid Interface & Chem Thermodynam, Beijing Natl Lab Mol Sci, 2 ZhongGuanCun BeiYiJie, Beijing 100190, Peoples R China

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2017年 / 139卷 / 29期

基金：

中国国家自然科学基金;

关键词：

LOW-POWER; SEMICONDUCTOR NANOCRYSTALS; ENANTIOSELECTIVE SYNTHESIS; ASYMMETRIC AUTOCATALYSIS; SUBSOLAR IRRADIANCE; ORGANIC-MOLECULES; ENERGY-TRANSFER; LIGHT; FLUORESCENCE; CHIRALITY;

D O I：

10.1021/jacs.7b04611

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Amplification of circularly polarized luminescence (CPL) is demonstrated in a triplet triplet annihilation-based photon upconversion (TTA-UC) system. When chiral binaphthyldiamine acceptors are sensitized with an achiral Pt(II) octaethylporphine (PtOEP) in solution, upconverted circularly polarized luminescence (UC-CPL) were observed for the first time, in which the positive or negative circularly polarized emission could be obtained respectively, following the molecular chirality of the acceptors (R/S). More interestingly, one order of magnitude amplification of the dissymmetry factor g(lum) in UC-CPL was obtained in comparison with the normal promoted CPL. The multistep photophysical process of TTA-UC including triplet-triplet energy transfer (TTET) and triplet-triplet annihilation (TTA) have been suggested to enhance the UC-CPL, which provided a new strategy to design CPL materials with a higher dissymmetry factor.

引用

页码：9783 / 9786

页数：4

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