Suppressing aggregation induced quenching in anthracene based conjugated polymers

被引：27

作者：

Congrave, Daniel G. ^{[1
]}

Drummond, Bluebell H. ^{[2
]}

Gray, Victor ^{[2
,3
]}

Bond, Andrew D. ^{[1
]}

Rao, Akshay ^{[2
]}

Friend, Richard H. ^{[2
]}

Bronstein, Hugo ^{[1
,2
]}

机构：

[1] Univ Cambridge, Dept Chem, Cambridge CB2 1EW, England

[2] Univ Cambridge, Cavendish Lab, Cambridge CB3 OHE, England

[3] Uppsala Univ, Dept Chem, Angstrom Lab, Box 523, S-75120 Uppsala, Sweden

来源：

POLYMER CHEMISTRY | 2021年 / 12卷 / 12期

基金：

英国工程与自然科学研究理事会; 瑞典研究理事会; 欧洲研究理事会;

关键词：

59;

D O I：

10.1039/d1py00118c

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Anthracene is a highly valuable building block for luminescent conjugated polymers, particularly when a large singlet-triplet energy gap (Delta E-ST) is desired. Unfortunately, the extended pi system of anthracene imparts a strong tendency for polymer aggregation, resulting in detrimental effects on its solid state photophysics. A large decrease in photoluminescence quantum yield (PLQY, phi(F)) on going from solution to the solid state is especially common, represented in terms of a low phi(R) (phi(R) = phi(F film)/phi(F sol.)). Significant and undesirable red-shifting of fluorescence in the solid state is also typical due to processes such as excimer formation. In this work a series of alkylene-encapsulated conjugated anthracene polymers is developed to overcome these challenging problems. We demonstrate a promising material which displays a good solid state PLQY that is effectively unchanged compared to solution measurements (phi(R) similar to 1, phi(F film) similar to 40%), alongside an identical PL 0-0 transition wavelength in solution and thin film. Such a direct transfer of luminescence properties from solution to the solid state is remarkable for a conjugated polymer and completely unprecedented for one based on anthracene.

引用

页码：1830 / 1836

页数：7