Aggregation-induced emission organogel formed by both sonication and thermal processing based on tetraphenylethylene and cholesterol derivative

Luo, Ming; Wang, Sheng; Li, Chengpeng; Miao, Wangen; Ma, Xiang

doi:10.1016/j.dyepig.2019.02.041

Cited by 22 publications

(9 citation statements)

References 41 publications

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“…The typical AIE‐active LMWGs employed in these studies were summarized according to the type of AIE moiety (i.e., TPE, tetraphenylsilole [TPS], and CNS), as outlined in Figure . More specifically, typical AIE‐active LMWGs based on TPE are 43 and 44 , [ 67 ] 45 , [ 68 ] 46 , [ 69 ] 47 , [ 70 ] 48 , [ 71 ] 49 , [ 72 ] 50 , [ 73 ] 51 , [ 74 ] 52 , [ 75 ] 53 , [ 76 ] 54 , [ 77 ] 55 , [ 78 ] 56 , [ 79 ] 57 , [ 80 ] 58 and 59 , [ 81 ] and 60 , [ 82 ] while typical AIE‐active LMWGs based on TPS are 61 and 62 , [ 83 ] and 63 , [ 62 ] and typical AIE‐active LMWGs based on CNS are 7 , [ 31,35–37 ] 64 , [ 84 ] 65 , [ 85 ] 66 and 67 , [ 86 ] 68 , 69 and 70 , [ 87 ] 71 , 72 and 73 , [ 88 ] 74 , [ 89 ] 75 and 76 , [ 90 ] 77 and 78 , [ 91 ] 79 , [ 92 ] 80 , [ 93 ] 81 , [ 94 ] 82 , [ 95 ] 83 and 84 , [ 96 ] 85 and 86 , [ 97 ] 87 , 88 and 89 , [ 98 ] 90 , [ 99 ] 91 , [ 100 ] 92 , [ 101 ] 93 , [ 102 ] and 94 , 95 and 96 . [ 103 ] Information of the AIE‐active supramolecular gels from the above LMWGs based on TPE, TPS, and CNS is also summarized in Table 2 .…”

Section: Fabricationsmentioning

confidence: 99%

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Aggregation‐Induced Emission‐Active Gels: Fabrications, Functions, and Applications

Xie

et al. 2021

Advanced Materials

142

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Chromophores that exhibit aggregation‐induced emission (i.e., aggregation‐induced emission luminogens [AIEgens]) emit intense fluorescence in their aggregated states, but show negligible emission as discrete molecular species in solution due to the changes in restriction and freedom of intramolecular motions. As solvent‐swollen quasi‐solids with both a compact phase and a free space, gels enable manipulation of intramolecular motions. Thus, AIE‐active gels have attracted significant interest owing to their various distinctive properties and promising application potential. Herein, a comprehensive overview of AIE‐active gels is provided. The fabrication strategies employed are detailed, and the applications of AIEgens are summarized. In addition, the gel functions arising from the AIE moieties are revealed, along with their structure–property relationships. Furthermore, the applications of AIE‐active gels in diverse areas are illustrated. Finally, ongoing challenges and potential means to address them are discussed, along with future perspectives on AIE‐active gels, with the overall aim of inspiring research on novel materials and ideas.

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Section: Fabricationsmentioning

confidence: 99%

“…Adapted with permission. [ 68 ] Copyright 2019, Elsevier Ltd. e) Chemical structure of gelator 52 . f) Photographic images and g) PL spectra (λ ex = 330 nm) showing the progressive gelation of 52 incubated with different concentrations of NaCl.…”

Section: Functionsmentioning

confidence: 99%

Aggregation‐Induced Emission‐Active Gels: Fabrications, Functions, and Applications

Xie

et al. 2021

Advanced Materials

142

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“…In 2001, aggregation-induced emission (AIE) phenomena were discovered by Tang et al, in which a kind of luminogen is weakly emissive or non-emissive as molecular species but highly luminescent as aggregates/clusters. Due to these unique characteristics, fluorescent AIE-based molecules, such as tetraphenylethene (TPE), have been widely employed in designing materials with various functions as a hydrophobic segment. − Adjustment of the photoluminescence of these materials is the key for their applications. − …”

Section: Introductionmentioning

confidence: 99%

AIE-Active and Thermoresponsive Alternating Polyurethanes of Bile Acid and PEG for Cell Imaging

Chen

Liu

Gao

et al. 2019

ACS Appl. Polym. Mater.

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Alternating polyurethanes (PUs) of poly(ethylene glycol) (PEG) and bile acids were synthesized through a single step condensation and then conjugated with a tetraphenylethene (TPE) derivative, a typical aggregation-induced emission (AIE) molecule, as chain ends. These degradable PUs showed thermo-sensitivity in water, and the phase transition temperatures can be adjusted through varying the ratios of hydrophilicity–hydrophobicity and the concentrations of the polymers. In aqueous solutions, these PUs emitted strong fluorescence, which gradually declined in intensity with increasing temperature. In the presence of γ-cyclodextrins, due to host–guest complexation of TPE units with γ-cyclodextrins, fluorescence exhibited a small decrease and then a significant increase upon heating. These PUs exhibited excellent cytocompatibility and were used for A375 cells imaging. Gradual enhancement of the green fluorescence was found mainly in the cytoplasm with increasing temperature assisted by γ-cyclodextrin. These alternating PUs provide a design for photofunctional biomaterials, such as injectable in situ drug carriers. The in vivo biocompatibility will be further evaluated.

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“…Owing to this aggregation, it was expected that AIE phenomena will still be observed in gels [39][40][41][42][43][44][45][46][47]. However, as the gels are soft molecular aggregates, the aggregated structure can be easily controlled by various external stimuli; thus, AIE gelators have potential applications as excellent stimuli-responsive luminescent materials [48][49][50][51][52][53][54][55][56][57]. In this paper, we discussed the relationship between the aggregated structures of molecules and the luminescence behavior of synthesized gold complexes Gn.…”

Section: Resultsmentioning

confidence: 99%

Stimuli-Sensitive Aggregation-Induced Emission of Organogelators Containing Mesogenic Au(I) Complexes

et al. 2020

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As the luminescence from conventional organic luminophores is typically quenched in constrained environments, the aggregation-induced emission (AIE) phenomenon is of interest for the development of materials that exhibit strong luminescence in condensed phases. Herein, new bismesogenic Au complexes were developed as organogelators and their photophysical properties, including their AIE characteristics, were investigated in organogels and crystals. The crystals of the gold complexes exhibited room-temperature phosphorescence with relatively high quantum yields. Moreover, the gold complexes also showed photoluminescence in the organogels and we demonstrated that the reversible switching of the luminescence intensity was induced by the sol-gel phase transition. The intense photoluminescence in the crystal and gel was induced by the restricted internal motion of the luminophore in the molecular aggregates. However, in the sol, the network structure of the organogel was destroyed and the nonradiative deactivation of the excited states was enhanced. As a result, we can conclude that the switching of the luminescence intensity was induced by changes in the aggregated structures of the molecules. The developed Au-complex-based gelators are excellent candidates for the realization of stimuli-responsive soft and smart luminescent materials.

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Aggregation-induced emission organogel formed by both sonication and thermal processing based on tetraphenylethylene and cholesterol derivative

Cited by 22 publications

References 41 publications

Aggregation‐Induced Emission‐Active Gels: Fabrications, Functions, and Applications

Aggregation‐Induced Emission‐Active Gels: Fabrications, Functions, and Applications

AIE-Active and Thermoresponsive Alternating Polyurethanes of Bile Acid and PEG for Cell Imaging

Stimuli-Sensitive Aggregation-Induced Emission of Organogelators Containing Mesogenic Au(I) Complexes

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