Dual‐Phase Thermally Activated Delayed Fluorescence Luminogens: A Material for Time‐Resolved Imaging Independent of Probe Pretreatment and Probe Concentration

Li, Xuping; Baryshnikov, Gleb V.; Ding, Lei; Bao, Xiaoyan; Li, Xin; Lu, Jianjun; Liu, Miaoqing; Shen, Shen; Luo, Mengkai; Zhang, Man; Ågren, Hans; Wang, Xudong; Zhu, Liangliang

doi:10.1002/ange.202000185

Cited by 10 publications

(3 citation statements)

References 52 publications

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“…Accordingly, a change of the luminescence properties upon aggregation can be used for visualizing material aggregation and self-assembly with different forms. Aggregation-induced emission (AIE) [4][5][6][7][8][9][10][11], referring to some type of organic luminophores that can reveal bright luminescence in aggregated or solid states by the suppression of the nonradiative decay, plays an important role in many fields of application, like displays and lighting [4][5][6][7][8][9][10][11], in information technology [12][13][14][15], and molecular probing [16][17][18]. However, water is largely required for the preparation of AIE aggregates (e.g., adding water into THF for preparing most of AIE aggregates [4][5][6][7][8][9][10][11][19][20][21] or conversely adding THF into water for aggregating some water-soluble AIEgens [22,23]).…”

Section: Introductionmentioning

confidence: 99%

Visualizing Material Processing via Photoexcitation-Controlled Organic-Phase Aggregation-Induced Emission

Yue

Baryshnikov

et al. 2021

Research

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Aggregation-induced emission (AIE) has been much employed for visualizing material aggregation and self-assembly. However, water is generally required for the preparation of the AIE aggregates, the operation of which limits numerous material processing behaviors. Employing hexathiobenzene-based small molecules, monopolymers, and block copolymers as different material prototypes, we herein achieve AIE in pure organic phases by applying a nonequilibrium strategy, photoexcitation-controlled aggregation. This strategy enabled a dynamic change of molecular conformation rather than chemical structure upon irradiation, leading to a continuous aggregation-dependent luminescent enhancement (up to ~200-fold increase of the luminescent quantum yield) in organic solvents. Accompanied by the materialization of the nonequilibrium strategy, photoconvertible self-assemblies with a steady-state characteristic can be achieved upon organic solvent processing. The visual monitoring with the luminescence change covered the whole solution-to-film transition, as well as the in situ photoprocessing of the solid-state materials.

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Section: Introductionmentioning

confidence: 99%

Visualizing Material Processing via Photoexcitation-Controlled Organic-Phase Aggregation-Induced Emission

Yue

Baryshnikov

et al. 2021

Research

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“…Obviously, the ФPL values are both lower than 35.3%. 25 Therefore, it is quite difficult to simultaneously realize highly emissive fluorophores with ФPL values both higher than 90% in solution and solid state, and a simple and more accurate molecular design strategy is highly desired.…”

Section: Introductionmentioning

confidence: 99%

Unity of Opposite: Highly Emissive Luminogens in both Solution and Aggregate States toward Room Temperature Phosphorescence and Electroluminescence

Han

Lin

Yao

et al. 2021

Preprint

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Organic light-emitting materials, especially those with two-phase high emission, have attracted considerable attention for applications in bioimaging agents, sensors, optoelectronic devices, etc. Many fluorophores applied in such fields either emit brightly in dilute solution or in aggregate state, with the former often suffering from aggregation-caused quenching effect, and the latter falling dark at low concentrations. Herein, we overcame the dilemma by balancing the planar and distorted structures with various side units and achieved bright emission in both dilute solution (e.g., the absolute quantum yields (ФPL) = 90.2% in THF) and in aggregate states (e.g., ФPL=92.7% in powder state, ФPL = 95.3% in crystal). These luminescent mate-rials are demonstrated as promising guests embedded into host matrix to achieve efficient room temperature phosphores-cence, and these host-guest systems could be applied in the information encryption. Moreover, these luminogens could also be used as single-component emitting layers to construct non-doped organic light-emitting diodes, from which a maximum external quantum efficiency up to 4.75% with Commission International de L’Eclairge (CIE) coordinates of (0.15, 0.05), which is neatest to next generation ultra-high definition television (UHDTV) display standard, was realized. This work pro-vides a feasible strategy of balancing the planar and distorted structure of a luminogen toward highly efficient emission in both solution and solid states.

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“…The use of luminescence in biological systems allows one to diagnose and understand cellular processes [1][2][3][4][5][6][7][8]. Luminescent labels, such as organic dyes [4,9,10], transition metal complexes [8,[11][12][13] and nanoparticles [1][2][3], are known, yet photobleaching and aggregation in the case of the organic dyes, as well as short emission lifetimes, and narrow Stokes shifts, limit their application.…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in Luminescence Imaging of Biological Systems Using Lanthanide(III) Luminescent Complexes

Monteiro

2020

Molecules

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The use of luminescence in biological systems allows one to diagnose diseases and understand cellular processes. Molecular systems, particularly lanthanide(III) complexes, have emerged as an attractive system for application in cellular luminescence imaging due to their long emission lifetimes, high brightness, possibility of controlling the spectroscopic properties at the molecular level, and tailoring of the ligand structure that adds sensing and therapeutic capabilities. This review aims to provide a background in luminescence imaging and lanthanide spectroscopy and discuss selected examples from the recent literature on lanthanide(III) luminescent complexes in cellular luminescence imaging, published in the period 2016–2020. Finally, the challenges and future directions that are pointing for the development of compounds that are capable of executing multiple functions and the use of light in regions where tissues and cells have low absorption will be discussed.

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Dual‐Phase Thermally Activated Delayed Fluorescence Luminogens: A Material for Time‐Resolved Imaging Independent of Probe Pretreatment and Probe Concentration

Cited by 10 publications

References 52 publications

Visualizing Material Processing via Photoexcitation-Controlled Organic-Phase Aggregation-Induced Emission

Visualizing Material Processing via Photoexcitation-Controlled Organic-Phase Aggregation-Induced Emission

Unity of Opposite: Highly Emissive Luminogens in both Solution and Aggregate States toward Room Temperature Phosphorescence and Electroluminescence

Recent Advances in Luminescence Imaging of Biological Systems Using Lanthanide(III) Luminescent Complexes

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