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Your search keyword '"Zhang, Heng-yi"' showing total 449 results
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449 results on '"Zhang, Heng-yi"'

6. Cucurbit[8]uril-mediated triphenylamine coumarin derivative cascade assembly for NIR targeted cell imaging.

Author

Yu, Zhen-Hai, Wang, Hui-Juan, Cheng, Qingwen, Zhang, Heng-Yi, and Liu, Yu

Abstract

A coumarin-modified tris[4-(4-pyridyl)phenyl]amine compound was encapsulated in the cavity of cucurbit[8]uril with a 2 : 3 stoichiometric ratio, which not only effectively enhances the guest fluorescence emission with a hypsochromic shift of about 51 nm by macrocycle confinement, but also allows cascade assembly with β-cyclodextrin-grafted hyaluronic acid (HACD) to construct a ternary supramolecular network. Furthermore, doping of sulfo-cyanine 5 into the β-cyclodextrin cavity of HACD through host–guest interaction achieved a high efficiency Förster resonance energy transfer system from the supramolecular network to dyes, which was successfully applied to near-infrared mitochondria-targeted imaging in HeLa cells. [ABSTRACT FROM AUTHOR]

Published
2024
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20. Dual‐Rotor Luminescence Based on Supramolecular Secondary Reassembly.

Author

Xu, Wen‐Wen, Qin, Yue‐Xiu, Niu, Jie, Xu, Wenshi, Chen, Yong, Zhang, Heng‐Yi, and Liu, Yu

Subjects
INTRAMOLECULAR proton transfer reactions, INTRAMOLECULAR charge transfer, STOKES shift, CELL imaging, HYALURONIC acid, INFORMATION technology security
Abstract

Herein, synergistically confining anthracene‐phenylpyridium derivatives (1' and 1) as dual‐rotor luminogens through macrocyclic cucurbit[8]uril (CB[8]) and hyaluronic acid (HA) mediated supramolecular secondary reassembly is reported to give bright fluorescence emission. The non‐emissive dual‐rotor molecule 1 first assembles with CB[8] to form non‐emissive supramolecular nanotubes, which are further reconstructed to be nanoparticles with a diameter of 83 nm by HA induced secondary reassembly through electrostatic interaction. Intriguingly, the secondary reassembly not only transforms the topological morphology, but also acts as a switch to activate the robust fluorescence of dual‐rotor molecule, accompanying emission at 600 nm with large Stokes shift (150 nm). This activation is mainly attributed to sufficient suppression of intramolecular rotation and promotion of intramolecular charge transfer of dual‐rotor molecule after reassembly. Benefiting from multiple components synergistic stimuli‐responsiveness and the targeted ability of HA to tumor cells, the secondary reassembly constructed dual‐rotor luminescence system is successfully applied in triplet encryption information security and targeted cancer cell imaging. [ABSTRACT FROM AUTHOR]

Published
2023
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33. Molecular design of crown ethers. synthesis of novel disulfide- and diselenide-bridged bis(benzo-12-crown-4)s and their Ag(sup)+ -selective electrode properties, 19

Author

Liu, Yu, Zhang, Heng-Yi, Chen, Lang-Xing, He, Xi-Wen, Wada, Takehiko, and Inoue, Yoshihisa

Subjects
Organic compounds -- Synthesis, Crown ethers -- Research, Ligands -- Analysis, Chemical structure -- Analysis, Biological sciences, Chemistry
Abstract

Research describes the synthesis and characterization of two new heteroatom-bridged bis(benzo-12-crown-4ehter)s and diselenides together with their silver-selectivities behavior and structure-selectivity relationship in the silver-ion-selective electrodes in terms of steric and electronic effects of the nitro groups.

Published
2000

37. Inclusion-Activated Reversible E/ZIsomerization of a Cyanostilbene Derivative Based on Cucurbit[8]uril under 365 nm Ultraviolet Irradiation

Author

Sun, Xiaohan, Liu, Zhixue, Wang, Ze, Huo, Man, Zhang, Heng-Yi, and Liu, Yu

Abstract

The photoisomerization behavior of cyanostilbene molecules is a hotspot in supramolecular configuration transformation research. Here, we reported a cyanostilbene derivative that converted from the Z,Z-isomer to the E,E-isomer under UV light irradiation at 365 nm. This process can be reversibly converted only in the presence of cucurbit[8]uril under the same light source, accompanied by the reversible conversion of fluorescence from green to yellow. No effective configuration transformation occurred with guest molecules only or upon the addition of cucurbit[7]uril. The photoisomerization was fully characterized by UV–vis and fluorescence spectroscopy, NMR, high-resolution mass spectrometry, and transmission electron microscopy. This work provides a new method for the supramolecular macrocyclic-activated configuration transformation.

Published
2022
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