A Multi-Stimuli-Responsive Molecule with Responses to Light, Oxygen, and Mechanical Stress through Flexible Tuning of Triplet Excitons

被引：32

作者：

Chen, Junru ^{[1
]}

Tian, Haiyan ^{[2
]}

Yang, Zhan ^{[2
]}

Zhao, Juan ^{[1
]}

Yang, Zhiyong ^{[2
]}

Zhang, Yi ^{[2
]}

Aldred, Matthew P. ^{[3
]}

Chi, Zhenguo ^{[2
]}

机构：

[1] Sun Yat Sen Univ, PCFM Lab,Sch Mat Sci & Engn, State Key Lab Optoelect Mat & Technol,GD HPPC Lab, Guangdong Engn Technol Res Ctr High Performance O, Guangzhou 510275, Peoples R China

[2] Sun Yat Sen Univ, Sch Chem, Guangzhou 510275, Peoples R China

[3] Univ Bolton, Bolton BL1 2AL, England

来源：

ADVANCED OPTICAL MATERIALS | 2021年 / 9卷 / 02期

基金：

中国国家自然科学基金;

关键词：

mechanochromism; multi‐ stimuli responses; oxygen‐ sensitive; photosensitive; triplet excitons; ROOM-TEMPERATURE PHOSPHORESCENCE; PERSISTENT; EMISSION; NANOPARTICLES; AIE;

D O I：

10.1002/adom.202001550

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Multifunctional stimuli-responsive materials have attracted tremendous attention because of their great potential in a variety of applications. However, conventional stimuli-responsive emitting materials are limited to single-stimulus response with rare attention paid to triplet excitons controlling. Herein, a multi-stimuli-responsive molecule (SPh-TP) with tuning of triplet excitons is reported. During illumination, the SPh-TP crystals with unique twisted structure and loose packing have a high probability to contact with neighboring oxygen atoms, followed by the occurrence of triplet-triplet energy transfer, and thus showing a photosensitive property. Meanwhile, the photosensitive property is also observed for the crystalline sample in vacuum, which is associated with oxygens locked in crystal pores. Upon mechanical stress, the crystalline morphology is broken and the molecules become more planar with tighter stacking, revealing its mechanochromism. In comparison to the crystalline sample, the ground sample can respond to light with different rates depending on the ratio of oxygen. This multi-stimuli-responsive material shows potential applications in oxygen detection and double-encryption of information.

引用

页数：7

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