Reversible Photoswitching of Triplet-Triplet Annihilation Upconversion Using Dithienylethene Photochromic Switches

被引：108

作者：

Cui, Xiaoneng ^{[1
]}

Zhao, Jianzhang ^{[1
]}

Zhou, Yuhan ^{[1
]}

Ma, Jie ^{[1
]}

Zhao, Yidong ^{[1
]}

机构：

[1] Dalian Univ Technol, Sch Chem Engn, State Key Lab Fine Chem, Dalian 116024, Peoples R China

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2014年 / 136卷 / 26期

关键词：

LOW-POWER; ELECTRON-TRANSFER; MOLECULAR DESIGN; EXCITED-STATES; VISIBLE-LIGHT; DIARYLETHENE; ABSORPTION; EFFICIENCY; PHOTOSENSITIZERS; SENSITIZERS;

D O I：

10.1021/ja504211y

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Reversible photoswitched triplet triplet annihilation upconversion (TTA UC) was demonstrated with dithienylethene (DTE) derivatives as the photochromic units, 2,6-diiodoBodipy as the triplet photosensitizer, and perylene as the triplet acceptor/emitter. The TTA UC is undisturbed by the open-form DTE but can be switched OFF upon photoirradiation of the mixture of the three components at 254 nm, i.e., by the closed-form DTE. Subsequent visible light irradiation restores the TTA UC. By studying the competitive triplet-state energy-transfer processes with nanosecond time-resolved transient difference absorption and fluorescence spectroscopy, we confirmed that the quenching of the perylene triplet excited state by closed-form DTE is dominant among the four possible quenching processes.

引用

页码：9256 / 9259

页数：4

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