Search

Your search keyword '"Feng, Hai-Tao"' showing total 193 results
Start Over Author "Feng, Hai-Tao"
193 results on '"Feng, Hai-Tao"'

7. Tetraphenylpyrazine-based chiral deep-blue dyes with high brightness for energy delivery.

Author

He, Xiang, Zheng, Canze, Deng, Xin, Hong, Yingjuan, Meng, Miao, Qi, Chunxuan, Feng, Hai-Tao, Chen, Ming, and Tang, Ben Zhong

Abstract

The search for deep-blue dyes with high luminescence efficiency in the aggregate state and high brightness is particularly important in optoelectronic application. Herein, based on a typical aggregation-induced emission (AIE) unit of tetraphenylpyrazine (TPP), four dyes were prepared by connecting it with chiral binaphthyl units via an acetylenic bond. The use of the TPP unit is critical to aggregation-enhanced emission (AEE) and deep-blue emission, whereas the merging of the binaphthyl unit is beneficial for molecular conjugation to remarkably improve absorption, photoluminescence (PL) quantum efficiency and brightness. Besides, the binaphthyl unit can serve as an axially chiral source to endow the deep-blue dyes with chirality. It was revealed that attaching a longer alkoxy chain to the dyes facilitates the formation of helical self-assemblies determined by chiral transfer but leads to an aggregation-caused emission (ACQ) effect. Moreover, using these deep-blue dyes as energy donors for energy delivery, other emissions and pure white light emission can be generated effectively via an energy transfer process based on a rational mixture of donors and acceptors in PMMA films. The device fabricated by coating this film onto a blue LED also emitted distinct and stable white light. This work provides a flexible way to design high-performance blue materials for potential applications. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

8. A planar electronic acceptor motif contributing to NIR-II AIEgen with combined imaging and therapeutic applications

Author

Chen, Ming, primary, Zhang, Zhijun, additional, Lin, Runfeng, additional, Liu, Junkai, additional, Xie, Meizhu, additional, He, Xiang, additional, Zheng, Canze, additional, Kang, Miaomiao, additional, Li, Xue, additional, Feng, Hai-Tao, additional, Lam, Jacky Wing Yip, additional, Wang, Dong, additional, and Tang, Ben-Zhong, additional

Published
2024
Full Text
View/download PDF

13. A ratiometric fluorescent probe for rapid and specific detection of hypochlorite.

Author

Chen, Pu, Nie, Qingli, Yan, Yuting, Yang, Juncheng, Feng, Hai‐Tao, and Tang, Ben Zhong

Abstract

Hypochlorite (ClO−), as a kind of essential reactive oxygen species, plays a crucial role in vitro and in vivo. Here, a ratiometric fluorescent probe (TPAM) was designed and constructed for sensing ClO− based on substituted triphenylamine and malononitrile, which exhibited obvious colour transfer from orange to colourless under daylight accompanied by noticeable fluorescence change from red to green in response to ClO−. TPAM could effectively monitor ClO− with the merits of fast response, excellent selectivity, high sensitivity and a low detection limit of 0.1014 μM. 1H NMR, mass spectra and theoretical calculations proved that ClO− caused the oxidation of the carbon–carbon double bond in TPAM, resulting in compound 1 and marked changes in colour and fluorescence. In addition, TPAM was utilized for imaging ClO− in living cells successfully with good photostability and biocompatibility. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

17. Type I Photosensitization with Strong Hydroxyl Radical Generation in NIR Dye Boosted by Vigorous Intramolecular Motions for Synergistic Therapy

Author

Lin, Runfeng, primary, Liu, Junkai, additional, Xu, Weilin, additional, Liu, Zicheng, additional, He, Xiang, additional, Zheng, Canze, additional, Kang, Miaomiao, additional, Li, Xue, additional, Zhang, Zhijun, additional, Feng, Hai‐Tao, additional, Lam, Jacky W. Y., additional, Wang, Dong, additional, Chen, Ming, additional, and Tang, Ben Zhong, additional

Published
2023
Full Text
View/download PDF

30. A Highly Efficient Fluorescent Sensor Based on AIEgen for Detection of Nitrophenolic Explosives.

Author

Li, Dongmi, Lv, Panpan, Han, Xiao-Wen, Jia, Zhilei, Zheng, Min, and Feng, Hai-Tao

Subjects
EXPLOSIVES detection, FLUORESCENCE quenching, NITROAROMATIC compounds, SOLID solutions, EXPLOSIVES, DETECTORS
Abstract

The detection of nitrophenolic explosives is important in counterterrorism and environmental protection, but it is still a challenge to identify the nitroaromatic compounds among those with a similar structure. Herein, a simple tetraphenylethene (TPE) derivative with aggregation-induced emission (AIE) characteristics was synthesized and used as a fluorescent sensor for the detection of nitrophenolic explosives (2, 4, 6-trinitrophenol, TNP and 2, 4-dinitrophenol, DNP) in water solution and in a solid state with a high selectivity. Meanwhile, it was found that only hydroxyl containing nitrophenolic explosives caused obvious fluorescence quenching. The sensing mechanism was investigated by using fluorescence titration and 1H NMR spectra. This simple AIE-active probe can potentially be applied to the construction of portable detection devices for explosives. [ABSTRACT FROM AUTHOR]

Published
2023
Full Text
View/download PDF

49. Supramolecular Assembly Based on Calix(4)arene and Aggregation‐Induced Emission Photosensitizer for Phototherapy of Drug‐Resistant Bacteria and Skin Flap Transplantation

Author

Wang, Rui‐Peng, Liu, Wenbin, Wang, Xiaoxuan, Shan, Guogang, Liu, Tuozhou, Xu, Fengrui, Dai, Honglian, Qi, Chunxuan, Feng, Hai‐Tao, and Tang, Ben Zhong

Abstract

Photodynamic therapy as a burgeoning and non‐invasive theranostic technique has drawn great attention in the field of antibacterial treatment but often encounters undesired phototoxicity of photosensitizers during systemic circulation. Herein, a supramolecular substitution strategy is proposed for phototherapy of drug‐resistant bacteria and skin flap repair by using macrocyclic p‐sulfonatocalix(4)arene (SC4A) as a host, and two cationic aggregation‐induced emission luminogens (AIEgens), namely TPE‐QAS and TPE‐2QAS, bearing quaternary ammonium group(s) as guests. Through host–guest assembly, the obtained complex exhibits obvious blue fluorescence in the solution due to the restriction of free motion of AIEgens and drastically inhibits efficient type I ROS generation. Then, upon the addition of another guest 4,4′‐benzidine dihydrochloride, TPE‐QAS can be competitively replaced from the cavity of SC4A to restore its pristine ROS efficiency and photoactivity in aqueous solution. The dissociative TPE‐QAS shows a high bacterial binding ability with an efficient treatment for methicillin‐resistant Staphylococcus aureus(MRSA) in dark and light irradiation. Meanwhile, it also exhibits an improved survival rate for MRSA‐infected skin flap transplantation and largely accelerates the healing process. Thus, such cascaded host–guest assembly is an ideal platform for phototheranostics research. Herein, a supramolecular assembly strategy is proposed for phototherapy of drug‐resistant bacteria and skin flap repair by using macrocyclic p‐sulfonatocalix(4)arene as host and two cationic aggregation‐induced emission luminogens bearing quaternary ammonium groups for guests. Such cascaded host–guest assembly is an ideal platform for phototheranostics research.

Published
2024
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results