Journal ArticleDOI
Changing the behavior of chromophores from aggregation-caused quenching to aggregation-induced emission: development of highly efficient light emitters in the solid state.
Wang Zhang Yuan,Ping Lu,Shuming Chen,Jacky Wing Yip Lam,Zhiming Wang,Yang Liu,Hoi Sing Kwok,Yuguang Ma,Ben Zhong Tang,Ben Zhong Tang +9 more
TLDR
A win‐win strategy would be the elimination of the ACQ effect without sacrificing other functional properties of the luminophores, in the work reported here, which has developed a new approach.Abstract:
The development of efficient luminescent materials in the solid state is of both scientific and technological interest. An obstacle to their development is the notorious aggregation-caused quenching (ACQ) effect: the emission of conventional luminophores is often weakened in the solid state in comparison to in solution, due to aggregate formation in the condensed phase. [1‐3] The ACQ problem must be properly tackled, because the luminophores are commonly used as solid films in their practical applications. Various chemical, physical, and engineering approaches have been taken to frustrate luminophore aggregation. [4,5] The attachment of bulky alicyclics, encapsulation by amphiphilic surfactants, and blending with transparent polymers are widely used methods to impede aggregate formation. These processes, however, are often accompanied by severe side effects. The steric effects of bulky alicyclics, for example, can twist the conformations of the chromophoric units and jeopardize the electronic conjugation in the luminophores, and the electronic effects of the saturated surfactants and nonconjugated polymers can dilute the luminophore density and obstruct the charge transport in electroluminescence (EL) devices. The current approaches to the problem are thus far from ideal, because the ACQ effect is alleviated at the expense of other useful properties of the luminophores. A win‐win strategy would be the elimination of the ACQ effect without sacrificing other functional properties of the luminophores. In the work reported here, we have developed such a new approach. Triphenylamine (TPA) and its derivatives are luminescent when dissolved in good solvents [6] for them but become less emissive when aggregated in the solid state, and are therefore typical ACQ luminophores. [7] Forread more
Citations
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Journal ArticleDOI
Aggregation-Induced Emission: Together We Shine, United We Soar!
TL;DR: This paper presents a meta-analysis of the chiral stationary phase transition of Na6(CO3)(SO4)2, a major component of the response of the immune system to Na2CO3.
Journal ArticleDOI
Aggregation-induced emission
TL;DR: In this critical review, recent progress in the area ofAIE research is summarized and typical examples of AIE systems are discussed, from which their structure-property relationships are derived.
Journal ArticleDOI
Aggregation-Induced Emission: The Whole Is More Brilliant than the Parts
TL;DR: “United the authors stand, United they fall”–Aesop.
Journal ArticleDOI
Tetraphenylethene: a versatile AIE building block for the construction of efficient luminescent materials for organic light-emitting diodes
TL;DR: In this article, a new class of propeller-like luminogenic molecules with aggregation-induced emission (AIE) characteristics has drawn increasing research interest, and tetraphenylethene (TPE) is an archetypal luminogen with a simple molecule structure.
Journal ArticleDOI
Biocompatible Nanoparticles with Aggregation‐Induced Emission Characteristics as Far‐Red/Near‐Infrared Fluorescent Bioprobes for In Vitro and In Vivo Imaging Applications
TL;DR: The AIE‐active fluorogen‐loaded BSA NPs show an excellent cancer cell uptake and a prominent tumor‐targeting ability in vivo due to the enhanced permeability and retention effect.
References
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Journal ArticleDOI
Aggregation-induced emission of 1-methyl-1,2,3,4,5-pentaphenylsilole
Jingdong Luo,Zhiliang Xie,Jacky W. Y. Lam,Lin Cheng,Haiying Chen,Chengfeng Qiu,Hoi Sing Kwok,Xiaowei Zhan,Yunqi Liu,Daoben Zhu,Ben Zhong Tang +10 more
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Aggregation-induced emission: phenomenon, mechanism and applications.
TL;DR: The restriction of intramolecular rotation is identified as a main cause for the AIE effect and a series of new fluorescent and phosphorescent AIE systems with emission colours covering the entire visible spectral region and luminescence quantum yields up to unity are developed.
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Electroluminescence of doped organic thin films
TL;DR: In this paper, a multilayer-doped EL was constructed using a hole-transport layer and a luminescent layer, and the electron-hole recombination and emission zones can be confined to about 50 A near the hole.