AIE-Active Macromolecules: Designs, Performances, and Applications

2021 ◽  
Author(s):  
Fei Zhang ◽  
Hui Xie ◽  
Bing Guo ◽  
Caizhen Zhu ◽  
Jian Xu
Keyword(s):  
High Brightness ◽  
Aggregation Induced Emission ◽  
Solid States

Macromolecules with aggregation-induced emission (AIE) characteristics as emerging soft lumesencet materials have gained increasing attention owing to their facile formulation, good processability, high brightness in aggregate and solid states, wide...

Rational design of HA-AuNPs@AIEDs nanoassembly for activatable fluorescence detection of HAase and imaging in tumor cells.

2021 ◽  
Author(s):  
Shenglan Wang ◽  
Chong-Hua Zhang ◽  
Peisheng Zhang ◽  
Shu Chen ◽  
Zhi-ling Song ◽  
...  
Keyword(s):  
Optical Properties ◽  
Tumor Cells ◽  
Fluorescence Detection ◽  
Rational Design ◽  
High Brightness ◽  
Aggregation Induced Emission ◽  
Fluorescence Bioimaging ◽  
In Virtue Of

Aggregation induced emission (AIE) dots have gained broad attention in fluorescence bioimaging and biosensor in virtue of their distinctive optical properties of splendid biocompatibility, high brightness and good photostability. However,...

scholarly journals Synthesis of a Benzothiadiazole-Based D−A Molecule with Aggregation-Induced Emission and Controlled Assembly Properties

Processes ◽  
2021 ◽  
Vol 9 (7) ◽  
pp. 1094
Author(s):  
Songhua Chen ◽  
Yongqi Liu ◽  
Meiyun He ◽  
Jianhua Huang
Keyword(s):  
Synergistic Effects ◽  
Preparation Methods ◽  
Solvent Vapor ◽  
Aggregation Induced Emission ◽  
Solid States ◽  
Diluted Solution ◽  
Non Covalent Interactions ◽  
Fluorescent Quantum Yield ◽  
Donor Moiety ◽  
Covalent Interactions

An electron-donating−accepting (D−A) molecule, namely, 4-(1-(4-(9H-carbazol-9-yl)phenyl)-1H-1,2,3-triazol-4-yl)benzo[c][1,2,5]thiadiazole (BT-SCC) containing carbazole as the donor moiety and benzothiadiazole as the acceptor moiety is prepared. Single-crystal X-ray structure analysis elucidated the multiple intermolecular interactions, such as hydrogen bonds, CH…π, and π…π interplays. Interestingly, the aggregation-induced emission phenomenon is observed for BT-SCC featured with enhanced fluorescent quantum yield from diluted solution of CH2Cl2 (Φ = ca. 0.1) to CH2Cl2/hexane mixed solutions or solid states (Φ = ca. 0.8). Finally, aggregates of BT-SCC are obtained through precipitating from hot and saturated solutions or solvent-vapor methods and the aggregating morphologies could be easily controlled through different preparation methods. Fabulous cube-like micro-crystals and nanospherical structures are obtained, which is established by the synergistic effects of the multiple non-covalent interactions, endowing potential utility in the field of optoelectronic devices.

scholarly journals Phenoxazine-Dibenzothiophene Sulfoximine Emitters Featuring Both Thermally Activated Delayed Fluorescence and Aggregation Induced Emission

Molecules ◽  
2021 ◽  
Vol 26 (17) ◽  
pp. 5243
Author(s):  
Yiyu Yang ◽  
Ran Xiao ◽  
Xiaosong Cao ◽  
Zhanxiang Chen ◽  
Xialei Lv ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Building Blocks ◽  
Delayed Fluorescence ◽  
High Chemical ◽  
High Brightness ◽  
Thermally Activated Delayed Fluorescence ◽  
Aggregation Induced Emission ◽  
Thermally Activated

In this work, we demonstrate dibenzothiophene sulfoximine derivatives as building blocks for constructing emitters featuring both thermally activated delayed fluorescent (TADF) and aggregation-induced emission (AIE) properties, with multiple advantages including high chemical and thermal stability, facile functionalization, as well as tunable electron-accepting ability. A series of phenoxazine-dibenzothiophene sulfoximine structured TADF emitters were successfully synthesized and their photophysical and electroluminescent properties were evaluated. The electroluminescence devices based on these emitters displayed diverse emissions from yellow to orange and reached external quantum efficiencies (EQEs) of 5.8% with 16.7% efficiency roll-off at a high brightness of 1000 cd·m−2.

scholarly journals Facilely prepared aggregation-induced emission (AIE) nanocrystals with deep-red emission for super-resolution imaging

2022 ◽  
Author(s):  
Ruohan Xu ◽  
Dongfeng Dang ◽  
Zhi Wang ◽  
Yu Zhou ◽  
Yanzi Xu ◽  
...  
Keyword(s):  
Super Resolution ◽  
Biological Imaging ◽  
Fast Method ◽  
High Brightness ◽  
Red Emission ◽  
Aggregation Induced Emission ◽  
Organic Nanocrystals ◽  
Resolution Imaging

Organic nanocrystals (NCs) with high brightness are highly desirable for biological imaging. However, the preparation of NCs in a facile and fast method is still challenging. Herein, aggregation-induced emission (AIE)...

scholarly journals Aggregation-Induced Emission Properties in Fully π-Conjugated Polymers, Dendrimers, and Oligomers

Polymers ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 213
Author(s):  
Antonio Sánchez-Ruiz ◽  
Ana Sousa-Hervés ◽  
Juan Tolosa Barrilero ◽  
Amparo Navarro ◽  
Joaquín C. Garcia-Martinez
Keyword(s):  
Organic Molecules ◽  
Photophysical Properties ◽  
Electronic Interactions ◽  
Aggregation Induced Emission ◽  
Solid States ◽  
Potential Applications ◽  
High Emission ◽  
Synthetic Routes ◽  
Future Direction ◽  
Almost All

Aggregation-Induced Emission (AIE) in organic molecules has recently attracted the attention of the scientific community because of their potential applications in different fields. Compared to small molecules, little attention has been paid to polymers and oligomers that exhibit AIE, despite having excellent properties such as high emission efficiency in aggregate and solid states, signal amplification effect, good processability and the availability of multiple functionalization sites. In addition to these features, if the molecular structure is fully conjugated, intramolecular electronic interactions between the composing chromophores may appear, thus giving rise to a wealth of new photophysical properties. In this review, we focus on selected fully conjugated oligomers, dendrimers and polymers, and briefly summarize their synthetic routes, fluorescence properties and potential applications. An exhaustive comparison between spectroscopic results in solution and aggregates or in solid state has been collected in almost all examples, and an opinion on the future direction of the field is briefly stated.

Multi-color solid-state emission of β-iminoenolate boron complexes tuned by methoxyl groups: aggregation-induced emission and mechanofluorochromism

RSC Advances ◽  
2016 ◽  
Vol 6 (49) ◽  
pp. 43755-43766 ◽  
Author(s):  
Zhenqi Zhang ◽  
Zhu Wu ◽  
Jingbo Sun ◽  
Pengchong Xue ◽  
Ran Lu
Keyword(s):  
Solid State ◽  
Aggregation Induced Emission ◽  
Solid States ◽  
Strong Luminescence ◽  
Boron Complexes

New β-iminoenolate boron complexes bearing benzoxazole were synthesized, and they exhibited strong luminescence in solid states.

A Stable Field Emission Electron Source

1977 ◽  
Vol 35 ◽  
pp. 58-59
Author(s):  
W.R. Bottoms ◽  
G.B. Haydon
Keyword(s):  
Field Emission ◽  
Signal To Noise Ratio ◽  
High Brightness ◽  
Electron Sources ◽  
Brightness Field ◽  
Current Densities ◽  
Properties Of Materials ◽  
Stable Field ◽  
Stable Current ◽  
Careful Design

There is great interest in improving the brightness of electron sources and therefore the ability of electron optical instrumentation to probe the properties of materials. Extensive work by Dr. Crew and others has provided extremely high brightness sources for certain kinds of analytical problems but which pose serious difficulties in other problems. These sources cannot survive in conventional system vacuums. If one wishes to gather information from the other signal channels activated by electron beam bombardment it is necessary to provide sufficient current to allow an acceptable signal-to-noise ratio. It is possible through careful design to provide a high brightness field emission source which has the capability of providing high currents as well as high current densities to a specimen. In this paper we describe an electrode to provide long-lived stable current in field emission sources.The source geometry was based upon the results of extensive computer modeling. The design attempted to maximize the total current available at a specimen.

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