

FOLLOWUS
a.Key Laboratory for Polymeric Composite & Functional Materials of Ministry of Education, Guangdong Provincial Key Laboratory for High Performance Polymer-based Composites, Guangdong Engineering Technology Research Center for High-performance Organic and Polymer Photoelectric Functional Films, State Key Laboratory of Optoelectronic Material and Technologies, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China
b.Shenzhen China Star Optoelectronics Technology Co., Ltd, Shenzhen 518107, China
Zhi-yong Yang (杨志涌), E-mail:yangzhy29@mail.sysu.edu.cn
Yi Zhang (张艺), E-mail:ceszy@mail.sysu.edu.cn
Zhen-guo Chi (池振国), E-mail:chizhg@mail.sysu.edu.cn
Received:29 September 2016,
Revised:2016-10-24,
Accepted:25 October 2016,
Published:2017-02
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Jun-ru Chen, Juan Zhao, Bing-jia Xu, et al. An AEE-active Polymer Containing Tetraphenylethene and 9, 10-Distyrylanthracene Moieties with Remarkable Mechanochromism[J]. Chinese Journal of Polymer Science, 2017, 35(2): 282-292.
Jun-ru Chen, Juan Zhao, Bing-jia Xu, et al. An AEE-active Polymer Containing Tetraphenylethene and 9, 10-Distyrylanthracene Moieties with Remarkable Mechanochromism[J]. Chinese Journal of Polymer Science, 2017, 35(2): 282-292. DOI: 10.1007/s10118-017-1894-9.
A polymer (poly (9
10-anthracenevinylene-
alt
-4
4'-(9
9-bis (4-(4'-(1
2
2'-triphenylvinyl) phenoxy) butyl)-9
H
-fluorene-2
7-diyl) dibenzaldehyde)
P1
) was successfully synthesized through the Wittig-Horner reaction by employing fluorene and 9
10-distyrylanthracene moieties as building blocks for backbone and tetraphenylethenes as pendant groups. Photophysical and thermal properties of the resulting polymeric emitter were fully characterized by ultraviolet-visible (UV-Vis) absorption and photoluminescence (PL) spectra
thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). While
P1
emits an orange-light centered at 567 nm in dilute tetrahydrofuran (THF) solution
the solid powder of the polymer exhibits strong yellow emission peaked at 541 nm. It is also found that the as-synthesized polymer shows unique property of aggregation-enhanced emission (AEE). In addition
P1
possesses high thermal stability with a decomposition temperature (
T
d
5%
) of 430℃ and high morphological stability with a glass transition temperature (
T
g
) of 171℃. Under the stimulus of mechanical force
the emission of
P1
can be changed from yellow to red (Δ
λ
max
=61 nm)
showing a remarkable mechanochromism. The results from XRD analysis suggest that such mechanochromic phenomenonof
P1
is probably caused by the destruction of crystalline structure
which leads to the conformational planarization of the distyrylanthracene moieties forming by the polymerization and the increase of molecular conjugation of the backbone.
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