Готові списки джерел за темами / Aggregation induced/enhanced emission

Добірка наукової літератури з теми "Aggregation induced/enhanced emission"

Автор: Grafiati

Опубліковано: 7 липня 2024

Оновлено: 7 липня 2024

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Статті в журналах з теми "Aggregation induced/enhanced emission":

Chandrasekharan, Swathi Vanaja, Nithiyanandan Krishnan, Siriki Atchimnaidu, Gowtham Raj, Anusree Krishna P. K., Soumya Sagar, Suresh Das, and Reji Varghese. "Blue-emissive two-component supergelator with aggregation-induced enhanced emission." RSC Advances 11, no. 32 (2021): 19856–63. http://dx.doi.org/10.1039/d1ra03751j.

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Wu, Bingzhao, Zhewen Guo, Guangfeng Li, Jun Zhao, Yuhang Liu, Jinbing Wang, Huigang Wang, and Xuzhou Yan. "Synergistic combination of ACQ and AIE moieties to enhance the emission of hexagonal metallacycles." Chemical Communications 57, no. 84 (2021): 11056–59. http://dx.doi.org/10.1039/d1cc03787k.

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Sheng, Xiaohai, and Yan Qian. "Photoswitchable Composite Organic Nanoparticles with Aggregation-Induced Enhanced Emission." Journal of Nanoscience and Nanotechnology 10, no. 12 (December 1, 2010): 8307–11. http://dx.doi.org/10.1166/jnn.2010.2993.

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Malakar, Ashim, Manishekhar Kumar, Anki Reddy, Himadree T. Biswal, Biman B. Mandal, and G. Krishnamoorthy. "Aggregation induced enhanced emission of 2-(2′-hydroxyphenyl)benzimidazole." Photochemical & Photobiological Sciences 15, no. 7 (2016): 937–48. http://dx.doi.org/10.1039/c6pp00122j.

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Iasilli, Giuseppe, Marco Scatto, and Andrea Pucci. "Vapochromic polyketone films based on aggregation‐induced enhanced emission." Polymers for Advanced Technologies 30, no. 5 (May 2018): 1160–64. http://dx.doi.org/10.1002/pat.4317.

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Xu, Defang, Ying Wang, Li Li, Hongke Zhou, and Xingliang Liu. "Aggregation-induced enhanced emission-type cruciform luminophore constructed by carbazole exhibiting mechanical force-induced luminescent enhancement and chromism." RSC Advances 10, no. 20 (2020): 12025–34. http://dx.doi.org/10.1039/d0ra00283f.

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Zhou, Jiahe, Fen Qi, Yuncong Chen, Shuren Zhang, Xiaoxue Zheng, Weijiang He, and Zijian Guo. "Aggregation-Induced Emission Luminogens for Enhanced Photodynamic Therapy: From Organelle Targeting to Tumor Targeting." Biosensors 12, no. 11 (November 16, 2022): 1027. http://dx.doi.org/10.3390/bios12111027.

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Photodynamic therapy (PDT) has attracted much attention in the field of anticancer treatment. However, PDT has to face challenges, such as aggregation caused by quenching of reactive oxygen species (ROS), and short 1O2 lifetime, which lead to unsatisfactory therapeutic effect. Aggregation-induced emission luminogen (AIEgens)-based photosensitizers (PSs) showed enhanced ROS generation upon aggregation, which showed great potential for hypoxic tumor treatment with enhanced PDT effect. In this review, we summarized the design strategies and applications of AIEgen-based PSs with improved PDT efficacy since 2019. Firstly, we introduce the research background and some basic knowledge in the related field. Secondly, the recent approaches of AIEgen-based PSs for enhanced PDT are summarized in two categories: (1) organelle-targeting PSs that could cause direct damage to organelles to enhance PDT effects, and (2) PSs with tumor-targeting abilities to selectively suppress tumor growth and reduce side effects. Finally, current challenges and future opportunities are discussed. We hope this review can offer new insights and inspirations for the development of AIEgen-based PSs for better PDT effect.

Tang, Baolei, Huapeng Liu, Feng Li, Yue Wang, and Hongyu Zhang. "Single-benzene solid emitters with lasing properties based on aggregation-induced emissions." Chemical Communications 52, no. 39 (2016): 6577–80. http://dx.doi.org/10.1039/c6cc02616h.

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Highly efficient single-benzene solid emitters exhibiting aggregation-induced emission (AIE), crystallization-enhanced emission (CEE), as well as amplified spontaneous emission (ASE) have been obtained based on structurally simple ESIPT-active organic molecules.

Sun, Guang-Xu, Ming-Gang Ju, Hang Zang, Yi Zhao, and WanZhen Liang. "Mechanisms of large Stokes shift and aggregation-enhanced emission of osmapentalyne cations in solution: combined MD simulations and QM/MM calculations." Physical Chemistry Chemical Physics 17, no. 37 (2015): 24438–45. http://dx.doi.org/10.1039/c5cp03800f.

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Khan, Faizal, Anupama Ekbote, and Rajneesh Misra. "Reversible mechanochromism and aggregation induced enhanced emission in phenothiazine substituted tetraphenylethylene." New Journal of Chemistry 43, no. 41 (2019): 16156–63. http://dx.doi.org/10.1039/c9nj03290h.

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Дисертації з теми "Aggregation induced/enhanced emission":

Ganesan, Parameshwari. "Investigation of Luminescent Properties in Rare-Earth free Metallophosphonate Hybrid Materials : structural Insights in photophysical studies." Electronic Thesis or Diss., Normandie, 2023. http://www.theses.fr/2023NORMC266.

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Durant ce travail de thèse, les propriétés structurelles et photoniques des metallophosphonates luminescents hybrides ont été étudiées en abordant le rôle de leur structure dans les propriétés luminescentes. Les métallophosphonates possèdent différentes coordinations chimiques montrant leurs capacités à former plusieurs centres métalliques ainsi qu’une forte liaison chimique de type P-O-M. L’objective de ce travail est l’étude des matériaux hybrides organiques-inorganiques luminescents dont le composant organique offre une plateforme solide facilement amovible avec divers groupes fonctionnels. Cette étude s’articule sur différents metallophosphonates hybrides synthétisés par voie hydrothermale à l’aide de ligands organiques tels que le fluorène, le thianthrène et l’acide phosphonique avec des éléments alcalino-terreux (Mg, Ca, Sr, Ba) et des métaux de transitions (Mn, Co, Cu, Zn). Ces derniers ont été obtenus en manipulant la nature de la molécule, le nombre de groupes fonctionnels et les propriétés cationiques au sein de la structure. Grace à leurs caractéristiques liés à leurs différents arrangements structurels, les matériaux synthétisés montrent diverses propriétés, notamment la rigidité et la stabilité thermique. De plus, ces matériaux montrent des propriétés de luminescences intéressantes tel que la fluorescence, phosphorescence à température ambiante (PTA), les déplacements bathochrome et hypsochrome, l’émission de type excimère ainsi que l’apparition de nouvelles bandes de luminescence rouge et verte pour certains cations spécifiques. Enfin, la variation des propriétés de composés hybrides en fonction de la structure est discutée, en tenant compte le phénomène d’émission induite par Agrégation (AIE) et d’émission améliorée par agrégation (AEE)
This thesis work systematically investigates the structural and photophysical properties of rare-earth-free metallophosphonate hybrid luminescent materials, emphasizing the role of structure in luminescent properties. Metallophosphonates demonstrate exceptional versatility with their coordination chemistry, highlighted by their ability to interact with multiple metal centers and form robust P-O-M metal bonds. We aim to study crystalline organic-inorganic hybrid luminescent materials in which the organic part provides a rigid platform which is easily modifiable with various functional groups. we present various metallophosphonate hybrids synthesized through the hydrothermal route using functionalized organic ligands such as Fluorene, Thianthrene, and Tetraphenylethylene (TPE) phosphonic acid with different alkaline-earth elements (Mg, Ca, Sr, Ba) and transition elements (Mn, Co, Cu, Zn). Different metallophosphonate materials are obtained by manipulating the nature of molecules, the number of functional groups, and the characteristics of cations in the structure. Due to that, the synthesized metallophosphonate hybrid materials exhibit diverse structural properties, including rigidity, thermal stability, and different arrangements like face-to-face or edge-to-face and herringbone stacking patterns. Furthermore, these materials display intriguing luminescent properties, such as Fluorescence, Room Temperature Phosphorescence (RTP), Bathochromic and Hypsochromic shift (red and blue shift), Excimer emission, and other novel green and red luminescence bands, particularly in the presence of specific cations. Lastly, we discuss and explore the interconnection between structural and physical properties including the phenomena of Aggregation Induced Emission (AIE) and Aggregation Enhanced Emission (AEE) for hybrid compounds

Yu, Wai Hong. "Synthesis, Characterization and application studies of new aggregation-induced emission (AIE)-active materials." HKBU Institutional Repository, 2018. https://repository.hkbu.edu.hk/etd_oa/496.

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The structural design, synthesis and characterization of luminogens with aggregation-induced emission (AIE) properties are studied in this thesis. The remarkable emission properties, thermal stability and biocompatibility of the AIE-active materials demonstrate the promising applications in bioimaging and organic light-emitting diodes (OLEDs).;Chapter 1 introduces the existence of aggregation-caused quenching (ACQ) effect in most conventional organic dyes as well as phosphorescent transitional metal complexes. Discovery of AIE and its mechanical study allow further exploration of usage in organic luminescent materials. This chapter also gives some examples and the applications these AIE-active compounds.;In Chapter 2, a series of cyanostilbenes with simple electron donor (D)-p-electron acceptor (A) structure are presented and synthesized. They exhibit remarkable AIE effect as well as deep red emission peak in 95 % water fraction in THF. These results indicate that attachment of these electron acceptors provides alternative strategy for designing highly emissive AIE-active materials.;In Chapter 3, strongly emissive cyanostilbenes with phenothiazine unit are designed and synthesized. This chapter also investigates the effect of substituents in phenothiazine and terminal cyanostilbene on the photophysical properties and AIE effect. The results suggest that they are AIE-active with different sizes in nano-aggregates. Furthermore, these dyes exhibit clear and strong fluorescence in live cell imaging with excellent biocompatibility.;In Chapter 4, a series of AIE-active phosphorescent Pt(II) complexes made up of C^N^C tridentate ligands are designed and synthesized. They exhibit different morphologies and emission properties upon aggregation in 90 % water in acetonitrile although similar tridentate ligands are applied. One of the complexes in this chapter show nano-rod formation with the highest quantum efficiency in aggregated state, suggesting that rapid self-assembly process occurs to prevent non-radiative decay and oxygen quenching.;In Chapter 5, a series of bis-cyanostyryl fluorophores are designed and synthesized. They are emissive in solid state with colour range from orange to NIR region. Furthermore, they are AIE-active and some of them may contain hybridized local and charge transfer (HLCT) excited state to achieve highly efficient emission upon solvatochromic investigation. Some bis-cyanostyryl thiophenes are fabricated in OLED devices show deep-red to NIR emission, indicative of a promising way to design solid-state NIR-emissive compounds using bis-cyanostyryl derivatives.;Finally, Chapter 6 and 7 present the concluding remarks and the experimental details of the work in Chapters 2 to 5, respectively.

Dong, Yujie. "Synthesis, photophysical properties and applications of aggregation-induced emission materials based on cyanostilbene moiety." HKBU Institutional Repository, 2016. https://repository.hkbu.edu.hk/etd_oa/313.

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The concept of "aggregation-induced emission" (AIE) effect has induced a great deal of attention these days. Now, exploration of new AIE-active molecular system and multiple high technique applications for AIE materials are the two research hotspots. Cyanostilbene, as a classical structural unit in photoelectric functional materials, also exhibited this unique luminescence behavior. The research background was illustrated in Chapter 1, which mainly introduced the development of this subject. In this project, Chapter 2 and Chapter 3 presented two classes of functionalized AIE-active molecules based on cyanostilbene moiety, and their applications were investigated, while Chapter 4 demonstrated a series of donor-acceptor (D-A) molecules with highly emissive unit, and their photophysical properties were studied.;In Chapter 2, four different donor-substituted cyanostilbene-based dipyrrins were synthesized and characterized. The investigation of photophysical properties confirms that these molecules are AIE-active, which should be attributed to the cyanostilbene moiety. The introduction of different donor groups showed little impact on their luminescence. Furthermore, the emission properties of these molecules were found to be sensitive to Zn2+, that is, addition of Zn2+ enormously enhanced its fluorescence in THF. The titration experiments proved they showed good selectivity and sensitivity for Zn2+ detection with relatively low limit of detection. Job's curve and spectral studies of their corresponding zinc complex indicated that the ratio for dipyrrins and Zn2+ is 2:1, which suggested the formation of zinc complex by chelation-enhanced fluorescence (CHEF) effect should be the reason of the enhanced fluorescence. By combining dipyrrin with typical AIE-active moiety tetraphenylethylene (TPE), an AIE-active TPE-based dipyrrin was prepared. The studies of its fluorogenic Zn2+ detection confirmed that the CHEF effect together with AIE effect are responsible for the intense fluorescence, indicating the potential application as a Zn2+ detector in aqueous media.;In Chapter 3, the cyanostilbene backbone was functionalized with a terpyridine unit to construct four terpyridine-based cyanostilbene molecules with different donor substitutents. The investigation of their photophysical properties confirms that they are AIEE-active. With the effect of different electron-donating groups, their solid-state fluorescence color was adjusted from blue to orange-red successfully. According to the calculation results of their frontier molecular orbitals, terpyridine has little impacts on their luminescence, but would influence their solid-state emission obviously owing to its large steric hindrance. This class of molecules displayed higher luminescence efficiency in solid state than in their dissolved state. The twisted molecular conformation in single crystal, which effectively avoids close π-π stacking, was assumed to be responsible for the high luminescence efficiency in solid state. This kind of molecules show distinct switched fluorescence by stimuli of acid/base vapors, and this phenomenon derives from the protonation effect of nitrogen atoms in the terpyridine unit. Moreover, three of these molecules exhibit good electroluminescence properties. Especially, the crystal of non-donor substituted molecule show amplified spontaneous emission (ASE) properties, indicating this blue-emissive material can be used in multiple areas such as chemical sensor, organic light emitting diodes (OLEDs) and organic laser media.

Lau, Wai Sum. "Synthesis, characterization and application studies of cyanostilbene-based molecular materials with aggregation-induced emission (AIE) characteristics." HKBU Institutional Repository, 2014. https://repository.hkbu.edu.hk/etd_oa/70.

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The molecular design, synthesis, spectroscopic and photophysical characterization of a series of cyanostilbene-based compounds are studied in this thesis. The thermal, electrochemical and aggregation induced emission (AIE) properties of these cyanostilbene-based compounds, as well as their application in organic lighting-emitting diodes, live cell imaging, chemical vapor sensor were investigated. Chapter 1 gives a brief introduction on the aggregation-caused quenching (ACQ) behavior of the conventional organic luminogens and the discovery and proposed mechanism of AIE phenomenon. Furthermore, some examples and the applications of these AIE compounds will be discussed. In Chapter 2, triphenylamine- and carbazole-containing cyanostilbene-based derivatives are presented. From the examination of the emission profile, they are all AIE-active through comparison of the photoluminescence intensity in dissolved and in aggregated states. Additionally, the calculation of the enhancement ratio (I/I0 – 1) of each fluorophore was performed in order to quantify its AIE effect. One of our cyanostilbene-based luminogens has achieved an enhancement ratio with a value of 1128. This cyanostilbene-based luminogens has also shown good performance in OLED investigation. In addition to the OLEDs application, the selected cyanostilbene-based luminogens with solid-state emission, cell-permeability and reversible switch-on/off capability have illustrated the positive result in live-cell imaging and chemical vapor sensing. Conjugated polymer with high molecular weight is the superior option by overcoming the weaknesses of low-molecular-weight luminogens with excellent thin-film form ability and comparatively simple and inexpensive fabrication processes. The design and synthesis of the cyanostilbene-based polymeric chromophores are described in Chapter 3. The polymerization of the AIE-active diacetylene ligands by connection of trans-[Pt(PBu3)2] unit at both ends has successfully retained their AIE behavior. In contrast, the ACQ problem has occurred on the polymers with organic spacers and the AIE-active ligands. From the DFT calculation on the Pt polymers and the blue shift of emission spectra in high water content suggested that the AIE phenomenon of Pt polymers is probably originated from the elimination of the non-radiative intramolecular charge transfer (ICT) process. Owing to the high demand in red-emitting materials in the applications of electroluminescent devices, fluorescent sensing and bio-imaging, effort has been made to design a system with the new chromophores with donor (D) – acceptor (A) system and thus to synthesize phenothiazine (D)-containing cyanostilbene (A)-based derivatives which are depicted in Chapter 4. Consistent with the conventional AIE-active luminogens with a successively climb of photoluminescence intensities in response to the increase of water proportion, phenothiazine-containing cyanostilbene-based derivatives has exhibited a V-shape fashion of emission intensity. It suggests that the emission of chromophores started to be quenched due to the increase of solvent polarity, overriding that of the molecular aggregation when a “small” volume of water is being introduced. While aggregate formation was dominant from the addition of a “large” amount of poor solvent, less polar local environment was created which suppressed the non-radiative transition to the ICT state and intensified the emission efficiency. Phenothiazine (D) – cyanostilbene (A) system has created a series of red-emitting chromophores with great tunability for the sake of achieving the desired emission color and better emission efficiency. To functionalize these AIE-active cyanostilbene-based chromophores, pyridine group was attached to the compounds to take the advantage of its metal-chelating capability, which is discussed in Chapter 5. The AIE features of cyanostilbene-based compounds can be preserved after the introduction of the pyridyl unit. Even it possessed a weak photoluminescence in its dilute solution which suggest that the high electron delocalization within the molecule has rigidified the structure to some extent, it is transformed to a highly emissive state with a high proportion of water. The exclusive variation of emission behavior with obvious bathochromic shift and boost of emission spectrum in the presence of cadmium-(II) ion has demonstrated its potential metal ion sensing ability. Chapter 6 and 7 present the concluding remarks and the experimental data of the compounds of Chapter 2 to 5, respectively.

Ohtani, Shunsuke. "Creation of Emissive and Functional Materials Based on Fused-Boron Complexes." Kyoto University, 2021. http://hdl.handle.net/2433/261618.

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Ito, Shunichiro. "Synthesis and Photophysical Properties of Functional Luminescent Materials Based on β-Diiminate Complexes Composed of Main-Group Metals". Doctoral thesis, Kyoto University, 2020. http://hdl.handle.net/2433/245840.

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Анотація:

京都大学
0048
新制・課程博士
博士(工学)
甲第22155号
工博第4659号
新制||工||1727(附属図書館)
京都大学大学院工学研究科高分子化学専攻
(主査)教授田中一生, 教授秋吉一成, 教授古賀毅
学位規則第4条第1項該当
Doctor of Philosophy (Engineering)
Kyoto University
DGAM

Suenaga, Kazumasa. "Precise Control of Highly-Efficient Solid-Emissive Property of Boron Ketoiminate." Kyoto University, 2019. http://hdl.handle.net/2433/242531.

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付記する学位プログラム名: 充実した健康長寿社会を築く総合医療開発リーダー育成プログラム
Kyoto University (京都大学)
0048
新制・課程博士
博士(工学)
甲第21793号
工博第4610号
新制||工||1718(附属図書館)
京都大学大学院工学研究科高分子化学専攻
(主査)教授田中一生, 教授秋吉一成, 教授大内誠
学位規則第4条第1項該当

Arribat, Mathieu. "Acides aminés phosphole ou silole : vers de nouvelles sondes fluorescentes pour un marquage de peptide innovant." Thesis, Montpellier, 2018. http://www.theses.fr/2018MONTS144.

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La première partie de ces travaux de thèse concerne la synthèse d’acides aminés phosphole par formation d’une liaison P-C. Les propriétés de fluorescence (absorption, émission et rendement quantique) sont modulées à la fois par les différents substituants présents sur le phosphore (BH3, O, S…) ainsi que par le squelette aromatique du phosphole. Des couplages peptidiques modèles réalisés en solution et sur support solide démontrent la possibilité d’intégrer ces acides aminés dans des peptides d’intérêts. La deuxième partie concerne la synthèse de nouveaux phospholes fonctionnalisés ainsi que d’une nouvelle méthode d’accrochage pour les introduire sur différents groupes pendants (SH, NH2, OH) d’acide aminés et peptides via la formation de liaisons P-S, P-N ou P-O. La troisième partie de ce travail a consisté en la synthèse d’une nouvelle classe d’acides aminés tétraphénylsilole fluorescents qui présentent des propriétés d’AIE (aggregation-induced emission) et pourront être utilisés pour le marquage de peptides d’intérêts
The first part of this work is focused on phospholyl amino acids synthesis by formation of a P-C bond. The fluorescent properties (absorption, emission and quantum yield) are modulated either by the substituent on the phosphorus atom (BH3, O, S, …) or by the aromatic skeleton of the phosphole. Peptide coupling in solution or on solid support were performed and showed the possibility to introduce such amino acids into peptide of interest. The second part of this work is dedicated to the synthesis of new functionalized phospholes for a chemoselective grafting on amino acid and peptides pendant groups (SH, NH2, OH) via PS, P-N or P-O bonds. The third part consists into the synthesis of a new class of tetraphenylsilole amino acids which exhibit AIE (aggregation-induced emission) fluorescent properties. Those compounds were successfully incorporated into di- an tri- peptides in solution and on solid support

Dong, Wenyue [Verfasser]. "The Design and Synthesis of Conjugated Polymers with Aggregation-Induced Emission and Their Application in Fluorescence Sensing / Wenyue Dong." Wuppertal : Universitätsbibliothek Wuppertal, 2015. http://d-nb.info/1076929885/34.

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Dong, Lei. "Conception et synthèse de glyco-sondes fluorescentes pour des applications en détection." Thesis, Lyon, 2019. http://www.theses.fr/2019LYSE1153/document.

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Avec le progrès scientifique et les besoins sociétaux, diverses méthodes de détection spécifiques et sensibles des métaux, des protéines et d’autres biomolécules sont largement utilisées dans la protection de l’environnement, la surveillance des maladies, la pharmacothérapie, la production agricole, l’industrie et d’autres domaines importants. Les sondes fluorescentes sont largement développées sur la base des phénomènes de transfert d’énergie (ICT, PET, FRET) et appliquées par exemple à la détection de contaminants ou à l'imagerie cellulaire. Mais l’effet d’agrégation (ACQ) atténue généralement l’intensité de la fluorescence et limite ainsi les applications de sondes organiques (souvent peu solubles dans l’eau) dans l’imagerie cellulaire et les systèmes vivants. Par conséquent, le concept d'« agregated induced emission » (AIE) représente une solution à ces problèmes d’agrégation et plusieurs glycoclusters, glyco-sondes et glyco-complexes fluorescents ont été conçus et reportés pour des applications en analyse biologique. Notre premier projet visait à concevoir et à synthétiser des glyco-polymères fluorescents pour le ciblage cellulaire et l’adressage de médicaments, tandis que la fluorescence permettrait la détection des cellules ciblées. Pour surmonter l'effet ACQ et les interférences provenant de la fluorescence biologique naturelle, nous avons conjugué le dicyanométhylène-4H-pyrane (DCM) et le tétraphényléthène (TPE) afin d'obtenir des sondes fluorescentes (AIE) émettant dans le proche infrarouge. Les glycosides ont fourni une bonne solubilité dans l'eau et l'auto-assemblage a conduit à des systèmes de détection et à une imagerie des cellules cancéreuses. Les glyco-polymères à base de TPE ont été synthétisés à partir de monomères de TPE incorporant deux monosaccharides par conjugaison azide-alcyne (CuAAC) et ces monomères ont été polymérisés par des réactions de CuAAC ou thiol-ène. Les glyco-polymères à base de TPE ne présentaient malheureusement pas une assez grande longueur de chaîne (généralement moins de 7 unités) et les propriétés fluorescentes attendues ne pouvaient donc pas être atteintes. Nous avons ensuite conçu et synthétisé des glyco-dots auto-assemblés par des sondes DCM et des glycoclusters à base de TPE. Les glyco-dots ont présenté une hydrosolubilité élevée et une réponse sélective au peroxynitrite (ONOO-) à la fois in vitro et dans des analyses cellulaires. Les glyco-dots pourraient détecter ONOO- endogène et exogène, mais sans reconnaissance cellulaire spécifique. Nous avons conçu et synthétisé des sondes fluorescentes AIE pouvant s'auto-assembler avec des glycoclusters à base de TPE. Les glyco-dots résultants étaient facilement solubles dans l'eau et présentaient une sensibilité et une sélectivité excellentes pour la détection du thiophénol in vitro et dans des échantillons d'eau environnementaux.Nous avons finalement combiné les deux fragments TPE et DCM pour synthétiser un nouveau fluorophore AIE (TPE-DCM) avec émission à longue longueur d'onde. Ensuite, la conjugaison avec des glycosides par CuAAC a conduit à des sondes AIE fluorescentes à émission de longue longueur d'onde, avec une excellente solubilité dans l'eau. Une application à la détection de glycosidases in vitro et dans des dosages cellulaires ou sur des modèles animaux a été possible avec ces sondes
With scientific and social progress, various methods for the specific and sensitive detection of metals, proteins and other biomolecules are widely utilized in environmental protection, disease surveillance, drug therapy, agricultural production, industry and other significant areas. Fluorescent probes are widely developed based on ICT, PET, FRET and other fluorescence mechanisms, and applied to the detection of contaminants or in cell imaging. But the ACQ effect usually quenched the fluorescence intensity and thus limited the applications of organic probes in cell imaging and living systems. Therefore, the concept of aggregated-induced emission (AIE) appears as a possible solution to these problems and several fluorescent glycoclusters, glyco-probes and glyco-complexes were designed and reported for biological analysis. Our first project aimed to design and synthesize fluorescent glyco-polymers with multiple glycosides for cell targeting and drug delivery while fluorescence will allow the detection of the targeted cells. To overcome the ACQ effect and interference from natural biological background fluorescence, we conjugated dicyanomethylene-4H-pyran (DCM) and tetraphenylethene (TPE) to obtain near-infrared AIE fluorescent probes. The glycosides provided good water solubility and self-assembly in water led to detection systems and imaging cancer cells. TPE-based glycopolymers were synthesized from TPE monomers incorporating two monosaccharides by CuAAC conjugation and these monomers were polymerized by either CuAAC or thiol-ene “click” reactions. The TPE-based glycopolymers did not display a large chain length (typically less than 7 units) and the expected fluorescent properties could not be reached. We then designed and synthesized glyco-dots self-assembled by DCM probes and TPE-based glycoclusters. The glyco-dots displayed high water-solubility and selective response to peroxynitrite (ONOO-) both in vitro and in cell assays. The glyco-dots could detect endogenous and exogenous ONOO- but no specific cell recognition. We designed and synthesized AIE fluorescent probes which could self-assemble with TPE-based glycoclusters. The resulting glyco-dots were readily water soluble and displayed excellent sensitivity and selectivity for thiophenol detection in vitro and in environmental water samples. We finally combined both TPE and DCM moieties to synthesize a novel AIE fluorophore (TPE-DCM) with long-wavelength emission. Then conjugation with glycosides through CuAAC led to AIE fluorescent probes with long-wavelength emission, excellent water-solubility. Application to the detection of glycosidases in vitro and in cell assays or animal models was possible with these probes

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Книги з теми "Aggregation induced/enhanced emission":

Tang, Youhong, and Ben Zhong Tang, eds. Aggregation-Induced Emission. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-89933-2.

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Qin, Anjun, and Ben Zhong Tang, eds. Aggregation-Induced Emission: Fundamentals. Chichester, United Kingdom: John Wiley and Sons Ltd, 2013. http://dx.doi.org/10.1002/9781118735183.

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Tang, Ben Zhong, and Anjun Qin. Aggregation-induced emission: Fundamentals. Chichester, West Sussex, United Kingdom: John Wiley & Sons Inc., 2014.

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Tang, Youhong, and Ben Zhong Tang, eds. Principles and Applications of Aggregation-Induced Emission. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-319-99037-8.

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Fujiki, Michiya, Bin Liu, and Ben Zhong Tang, eds. Aggregation-Induced Emission: Materials and Applications Volume 1. Washington, DC: American Chemical Society, 2016. http://dx.doi.org/10.1021/bk-2016-1226.

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Fujiki, Michiya, Bin Liu, and Ben Zhong Tang, eds. Aggregation-Induced Emission: Materials and Applications Volume 2. Washington, DC: American Chemical Society, 2016. http://dx.doi.org/10.1021/bk-2016-1227.

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Zhong Tang, Ben, and Xinggui Gu, eds. Aggregation-Induced Emission. De Gruyter, 2022. http://dx.doi.org/10.1515/9783110672220.

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Zhong Tang, Ben, and Xinggui Gu, eds. Aggregation-Induced Emission. De Gruyter, 2022. http://dx.doi.org/10.1515/9783110673074.

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Tang, Ben-Zhong, and Youhong Tang. Aggregation Induced Emission. Springer International Publishing AG, 2021.

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Tang, Ben-Zhong, and Youhong Tang. Aggregation-Induced Emission. Springer International Publishing AG, 2022.

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Частини книг з теми "Aggregation induced/enhanced emission":

Hong, Jin-Long. "Enhanced Emission by Restriction of Molecular Rotation." In Aggregation-Induced Emission: Fundamentals, 285–305. Chichester, United Kingdom: John Wiley and Sons Ltd, 2013. http://dx.doi.org/10.1002/9781118735183.ch13.

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Wu, Wenbo, Udayagiri Vishnu Saran, and Bin Liu. "Nanocrystals with Crystallization-Induced or Enhanced Emission." In Principles and Applications of Aggregation-Induced Emission, 291–306. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-99037-8_11.

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Dong, Yongqiang. "Crystallization-Induced Emission Enhancement." In Aggregation-Induced Emission: Fundamentals, 323–35. Chichester, United Kingdom: John Wiley and Sons Ltd, 2013. http://dx.doi.org/10.1002/9781118735183.ch15.

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Corey, Joyce Y. "Synthesis of Siloles (and Germoles) that Exhibit the AIE Effect." In Aggregation-Induced Emission: Fundamentals, 1–37. Chichester, United Kingdom: John Wiley and Sons Ltd, 2013. http://dx.doi.org/10.1002/9781118735183.ch01.

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Mullin, Jerome L., and Henry J. Tracy. "Aggregation-Induced Emission in Group 14 Metalloles (Siloles, Germoles, and Stannoles): Spectroscopic Considerations, Substituent Effects, and Applications." In Aggregation-Induced Emission: Fundamentals, 39–60. Chichester, United Kingdom: John Wiley and Sons Ltd, 2013. http://dx.doi.org/10.1002/9781118735183.ch02.

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Xu, Bin, Jibo Zhang, and Wenjing Tian. "Aggregation-Induced Emission of 9,10-Distyrylanthracene Derivatives and Their Applications." In Aggregation-Induced Emission: Fundamentals, 61–82. Chichester, United Kingdom: John Wiley and Sons Ltd, 2013. http://dx.doi.org/10.1002/9781118735183.ch03.

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Shimizu, Masaki. "Diaminobenzene-Cored Fluorophores Exhibiting Highly Efficient Solid-State Luminescence." In Aggregation-Induced Emission: Fundamentals, 83–104. Chichester, United Kingdom: John Wiley and Sons Ltd, 2013. http://dx.doi.org/10.1002/9781118735183.ch04.

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Fery-Forgues, Suzanne. "Aggregation-Induced Emission in Organic Ion Pairs." In Aggregation-Induced Emission: Fundamentals, 105–25. Chichester, United Kingdom: John Wiley and Sons Ltd, 2013. http://dx.doi.org/10.1002/9781118735183.ch05.

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Huang, Jing, Qianqian Li, and Zhen Li. "Aggregation-Induced Emission Materials: the Art of Conjugation and Rotation." In Aggregation-Induced Emission: Fundamentals, 127–53. Chichester, United Kingdom: John Wiley and Sons Ltd, 2013. http://dx.doi.org/10.1002/9781118735183.ch06.

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Yuan Shen, Xiao, Anjun Qin, and Jing Zhi Sun. "Red-Emitting AIE Materials." In Aggregation-Induced Emission: Fundamentals, 155–67. Chichester, United Kingdom: John Wiley and Sons Ltd, 2013. http://dx.doi.org/10.1002/9781118735183.ch07.

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Тези доповідей конференцій з теми "Aggregation induced/enhanced emission":

Mishra, Anasuya, Anshu Kumar, Anil Kumar, and Anindya Dutta. "Aggregation induced enhanced emission in Dimethyl-2,5-bis(4-methoxyphenylamino)terephthalate." In Reporters, Markers, Dyes, Nanoparticles, and Molecular Probes for Biomedical Applications XII, edited by Samuel Achilefu and Ramesh Raghavachari. SPIE, 2020. http://dx.doi.org/10.1117/12.2548917.

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Zhao, Miao, Jing Wen, and Hao Ruan. "Mg2+ enhanced information point fluorescence contrast for aggregation-induced emission optical storage." In 13th International Photonics and OptoElectronics Meetings (POEM 2021), edited by Xinliang Zhang, Perry Shum, and Jianji Dong. SPIE, 2022. http://dx.doi.org/10.1117/12.2625865.

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Lim, Chang-Keun, Anton Popov, Gleb Tselikov, Jeongyun Heo, Artem Pliss, Sehoon Kim, Andrei V. Kabashin, and Paras N. Prasad. "Laser-ablative synthesis of aggregation-induced enhanced emission luminophore dyes in aqueous solutions." In Synthesis and Photonics of Nanoscale Materials XVI, edited by Andrei V. Kabashin, Jan J. Dubowski, and David B. Geohegan. SPIE, 2019. http://dx.doi.org/10.1117/12.2513821.

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Dong, Yongqiang, Jacky Wing Yip Lam, Anjun Qin, Zhen Li, Jiaxin Sun, Hoi Sing Kwok, and Ben Zhong Tang. "Aggregation-induced emission." In SPIE Optics + Photonics, edited by Zakya H. Kafafi and Franky So. SPIE, 2006. http://dx.doi.org/10.1117/12.679373.

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Kim, Yong Hyun, Goddy Chungag, Joon Sang Lee, Emmanuel Ayorinde, and Xin Wu. "Studies on Blood Rheology in a Coronary Artery Using CFD Technique With an AE Sensor." In ASME 2007 International Mechanical Engineering Congress and Exposition. ASMEDC, 2007. http://dx.doi.org/10.1115/imece2007-43431.

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Анотація:

There still exists a need for developing more accurate generalized models for multiscale biofluids systems that enable clearer understanding of normal microcirculation and complexities of disease hemorheology. Such work will yield enhanced computational and experimental techniques for a wider class of flows having fluid-solid interactions, complex moving boundaries, and involving red blood cell (RBC) aggregation under physiological conditions. The work reported here has involved the multiphase non-Newtonian fluid simulations of pulsatile flow in an idealized coronary artery model have been performed using numerical and experimental studies. The secondary flow affected a local RBC accumulation on the inside curvature and it changed the local flow characteristics as well. RBC viscosity and wall shear stress (WSS) were changed with a function of local hemotocrit. In practical work involving specialized velocity measurement and acoustic emission monitoring of flow characteristics, flow-induced vibration effects, as well as material and physiological aspects of arterial systems were conducted. Computations of arterial flows were made and experimental investigations using glass microtube simulations of arteries were carried out. This work contributes to an understanding of the mechanics of relationship between the progression of certain inherited diseases and the mechanical deformation characteristics of the arterial system and the RBC.

Hong, Yuning, Yongqiang Dong, Hui Tong, Zhen Li, Matthias Häußler, Jacky Wing Yip Lam, and Ben Zhong Tang. "Aggregation- and crystallization-induced light emission." In Integrated Optoelectronic Devices 2007, edited by James G. Grote, Francois Kajzar, and Nakjoong Kim. SPIE, 2007. http://dx.doi.org/10.1117/12.707609.

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Jumat, Saidatul Aisyah Haji, Nur Basirah Mohd Addie Sukaimi, Malai Haniti Sheikh Abdul Hamid, Ying Woan Soon, and Anwar Usman. "Aggregation-induced emission properties of trans-stilbene." In THE 5TH INTERNATIONAL TROPICAL RENEWABLE ENERGY CONFERENCE (THE 5TH iTREC). AIP Publishing, 2021. http://dx.doi.org/10.1063/5.0063770.

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Luo, Zhijun, Yanan Liu, Menglin Chen, Zongsong Gan, and Chang-Sheng Xie. "Aggregation induced emission molecule applied in optical data storage." In Information Storage System and Technology. Washington, D.C.: OSA, 2019. http://dx.doi.org/10.1364/isst.2019.jw4a.13.

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Pucci, Andrea, Giuseppe Iasilli, Francesco Tantussi, Francesco Fuso, and Giacomo Ruggeri. "Aggregation induced emission as a new tool for polymer traceability." In 6TH INTERNATIONAL CONFERENCE ON TIMES OF POLYMERS (TOP) AND COMPOSITES. AIP, 2012. http://dx.doi.org/10.1063/1.4738407.

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Quan, Changyun, Han Nie, Zujin Zhao, and Ben Zhong Tang. "N-type organic luminescent materials based on siloles with aggregation-enhanced emission." In SPIE Organic Photonics + Electronics, edited by Franky So, Chihaya Adachi, and Jang-Joo Kim. SPIE, 2015. http://dx.doi.org/10.1117/12.2187863.

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Звіти організацій з теми "Aggregation induced/enhanced emission":

Chefetz, Benny, Baoshan Xing, Leor Eshed-Williams, Tamara Polubesova, and Jason Unrine. DOM affected behavior of manufactured nanoparticles in soil-plant system. United States Department of Agriculture, January 2016. http://dx.doi.org/10.32747/2016.7604286.bard.

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The overall goal of this project was to elucidate the role of dissolved organic matter (DOM) in soil retention, bioavailability and plant uptake of silver and cerium oxide NPs. The environmental risks of manufactured nanoparticles (NPs) are attracting increasing attention from both industrial and scientific communities. These NPs have shown to be taken-up, translocated and bio- accumulated in plant edible parts. However, very little is known about the behavior of NPs in soil-plant system as affected by dissolved organic matter (DOM). Thus DOM effect on NPs behavior is critical to assessing the environmental fate and risks related to NP exposure. Carbon-based nanomaterials embedded with metal NPs demonstrate a great potential to serve as catalyst and disinfectors. Hence, synthesis of novel carbon-based nanocomposites and testing them in the environmentally relevant conditions (particularly in the DOM presence) is important for their implementation in water purification. Sorption of DOM on Ag-Ag₂S NPs, CeO₂ NPs and synthesized Ag-Fe₃O₄-carbon nanotubebifunctional composite has been studied. High DOM concentration (50mg/L) decreased the adsorptive and catalytic efficiencies of all synthesized NPs. Recyclable Ag-Fe₃O₄-carbon nanotube composite exhibited excellent catalytic and anti-bacterial action, providing complete reduction of common pollutants and inactivating gram-negative and gram-positive bacteria at environmentally relevant DOM concentrations (5-10 mg/L). Our composite material may be suitable for water purification ranging from natural to the industrial waste effluents. We also examined the role of maize (Zeamays L.)-derived root exudates (a form of DOM) and their components on the aggregation and dissolution of CuONPs in the rhizosphere. Root exudates (RE) significantly inhibited the aggregation of CuONPs regardless of ionic strength and electrolyte type. With RE, the critical coagulation concentration of CuONPs in NaCl shifted from 30 to 125 mM and the value in CaCl₂ shifted from 4 to 20 mM. This inhibition was correlated with molecular weight (MW) of RE fractions. Higher MW fraction (> 10 kDa) reduced the aggregation most. RE also significantly promoted the dissolution of CuONPs and lower MW fraction (< 3 kDa) RE mainly contributed to this process. Also, Cu accumulation in plant root tissues was significantly enhanced by RE. This study provides useful insights into the interactions between RE and CuONPs, which is of significance for the safe use of CuONPs-based antimicrobial products in agricultural production. Wheat root exudates (RE) had high reducing ability to convert Ag+ to nAg under light exposure. Photo-induced reduction of Ag+ to nAg in pristine RE was mainly attributed to the 0-3 kDa fraction. Quantification of the silver species change over time suggested that Cl⁻ played an important role in photoconversion of Ag+ to nAg through the formation and redox cycling of photoreactiveAgCl. Potential electron donors for the photoreduction of Ag+ were identified to be reducing sugars and organic acids of low MW. Meanwhile, the stabilization of the formed particles was controlled by both low (0-3 kDa) and high (>3 kDa) MW molecules. This work provides new information for the formation mechanism of metal nanoparticles mediated by RE, which may further our understanding of the biogeochemical cycling and toxicity of heavy metal ions in agricultural and environmental systems. Copper sulfide nanoparticles (CuSNPs) at 1:1 and 1:4 ratios of Cu and S were synthesized, and their respective antifungal efficacy was evaluated against the pathogenic activity of Gibberellafujikuroi(Bakanae disease) in rice (Oryza sativa). In a 2-d in vitro study, CuS decreased G. fujikuroiColony- Forming Units (CFU) compared to controls. In a greenhouse study, treating with CuSNPs at 50 mg/L at the seed stage significantly decreased disease incidence on rice while the commercial Cu-based pesticide Kocide 3000 had no impact on disease. Foliar-applied CuONPs and CuS (1:1) NPs decreased disease incidence by 30.0 and 32.5%, respectively, which outperformed CuS (1:4) NPs (15%) and Kocide 3000 (12.5%). CuS (1:4) NPs also modulated the shoot salicylic acid (SA) and Jasmonic acid (JA) production to enhance the plant defense mechanisms against G. fujikuroiinfection. These results are useful for improving the delivery efficiency of agrichemicals via nano-enabled strategies while minimizing their environmental impact, and advance our understanding of the defense mechanisms triggered by the NPs presence in plants.