Understanding the details of aggregation-induced emission (AIE) effect in D-π-A type imidazolium-based compounds through the stepwise change of rotatable moieties

Gao, Chao; Hossain, Kamal; Wahab, Abdul Wahid; Xiong, Jinyan; Qiu, Bang-Ming; Luo, Hanhan; Li, Wei

doi:10.1016/j.dyepig.2018.08.032

Cited by 26 publications

(20 citation statements)

References 29 publications

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“…16 Upon the increase of f T , the fluorescence intensity was improved gradually. Compound TPI-1 and TPI-2 were well dissolved in water, but completely insoluble in THF, thus their AIE behaviors were studied in water/THF mixed solution with different volume fractions of THF (f T ).…”

Section: Resultsmentioning

confidence: 97%

“…In addition, the obvious Tyndall phenomenon illustrated the aggregation of solution. 16 When f T = 99 vol %, the maximum emission peak of TPI-2 had an obvious blue-shift, which was also caused by the reduced polarity of solvents. Therefore, TPI-1 was a typical AIE-active molecule, and the restricted rotation of imidazolium unit (A) through C N single bond gave the intense emission.…”

Section: Resultsmentioning

confidence: 97%

“…It has been widely used in constructing the conjugated cationic luminophores. 16 Although these imidazolium compounds could prevent ACQ problem, their insolubility in water was harmful for their applications in organism. 14 The cationic probes were facile to interact with and enter into living cells because of the electrostatic interaction.…”

Section: Introductionmentioning

confidence: 99%

“…The cationic probes were facile to interact with and enter into living cells because of the electrostatic interaction . In our previous work, we reported two imidazolium compounds with D–π–A structures that emitted brightly in the aggregate state, because their highly twisted conformations efficiently avoided the π‐π stacking interactions . Although these imidazolium compounds could prevent ACQ problem, their insolubility in water was harmful for their applications in organism.…”

Section: Introductionmentioning

confidence: 99%

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The Fluorescence Behavior Studies and Applications of Two D‐π‐A Type Imidazolium Analogs

Zhai

Hossain

et al. 2019

Bulletin Korean Chem Soc

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The fluorescence behaviors and applications of two water-soluble imidazolium analogs TPI-1 and TPI-2 with D-π-A structures have been studied. Compound TPI-1 possessed the aggregation-induced emission (AIE) effect, but TPI-2 not. Moreover, compound TPI-1 could serve as a fluorescence turn-on probe for detecting uridine-5'-triphosphate (UTP) in living cells by AIE mechanism, while TPI-2 was able to penetrate into the cell membranes and light up the living cells.

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Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The Fluorescence Behavior Studies and Applications of Two D‐π‐A Type Imidazolium Analogs

Zhai

Hossain

et al. 2019

Bulletin Korean Chem Soc

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“…Technological demands have generated pronounced interest in the study and development of new luminogens and the scientific community has witnessed a phenomenal escalation in the exploration of efficient AIEgenic materials for various applications including the biomarkers, organic light‐emitting diodes (OLED), and sensors . Although several AIEgens have been constructed based on different structural motifs, the working mechanisms of the AIEgens are highly debatable and mandate extensive research …”

Section: Introductionmentioning

confidence: 99%

Rationally Designed Furocarbazoles as Multifunctional Aggregation Induced Emissive Luminogens for the Sensing of Trinitrophenol (TNP) and Cell Imaging

et al. 2020

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Two structurally unique aggregation induced emission (AIE)‐active luminogens have been designed and synthesized based on the furocarbazole skeleton. Such small molecule AIEgens were designed based on forbidden planarity and engineering a twist into the scaffold to realize induction of emission in the aggregated states. The structures were fully characterized and their thermal stabilities, electronic properties, photophysical and electrochemical properties were systematically investigated. The unique twist in the molecules as evident from their X‐ray crystal structure along with the short intermolecular interactions enhances the structural rigidification and restricts detrimental π–π stacking interactions, restricting the internal rotations (RIR) accompanied by a curb of the ICT process, resulting in enhanced emission in the aggregated state. This intriguing luminescent property enabled one of the luminogens to selectively detect trinitrophenol (TNP) over other nitroaromatics in both aqueous and organic media at nanomolar concentrations. Moreover, the good photostabilities and biocompatibilities empowered both luminogens to function as fluorescent bioprobes for cancer cell imaging.

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Stimuli‐Responsive Electrospun Fluorescent Fibers Augmented with Aggregation‐Induced Emission (AIE) for Smart Applications

Kachwal

Tan

2022

Advanced Science

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This review addresses the latest advancements in the integration of aggregation-induced emission (AIE) materials with polymer electrospinning, to accomplish fine-scale electrospun fibers with tunable photophysical and photochemical properties. Micro-and nanoscale fibers augmented with AIE dyes (termed AIEgens) are bespoke composite systems that can overcome the limitation posed by aggregation-caused quenching, a critical deficiency of conventional luminescent materials. This review comprises three parts. First, the reader is exposed to the basic concepts of AIE and the fundamental mechanisms underpinning the restriction of intermolecular motions. This is followed by an introduction to electrospinning techniques pertinent to AIE-based fibers, and the core parameters for controlling fiber architecture and resultant properties. Second, exemplars are drawn from latest research to demonstrate how electrospun nanofibers and porous films incorporating modified AIEgens (especially tetraphenylethylene and triphenylamine derivatives) can yield enhanced photostability, photothermal properties, photoefficiency (quantum yield), and improved device sensitivity. Advanced applications are drawn from several promising sectors, encompassing optoelectronics, drug delivery and biology, chemosensors and mechanochromic sensors, and innovative photothermal devices, among others. Finally, the outstanding challenges together with potential opportunities in the nascent field of electrospun AIE-active fibers are presented, for stimulating frontier research and explorations in this exciting field.

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Understanding the details of aggregation-induced emission (AIE) effect in D-π-A type imidazolium-based compounds through the stepwise change of rotatable moieties

Cited by 26 publications

References 29 publications

The Fluorescence Behavior Studies and Applications of Two D‐π‐A Type Imidazolium Analogs

The Fluorescence Behavior Studies and Applications of Two D‐π‐A Type Imidazolium Analogs

Rationally Designed Furocarbazoles as Multifunctional Aggregation Induced Emissive Luminogens for the Sensing of Trinitrophenol (TNP) and Cell Imaging

Stimuli‐Responsive Electrospun Fluorescent Fibers Augmented with Aggregation‐Induced Emission (AIE) for Smart Applications

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