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7 results on '"Shou Ting Wu"'

1. A Turn-On Fluorescent Chemosensor for Cyanide Ion Detection in Real Water Samples

Author

Qing Shi, Shou-Ting Wu, Lingyi Shen, Tao Zhou, Hong Xu, Zhi-Yong Wang, Xian-Jiong Yang, Ya-Li Huang, and Qi-Long Zhang

Subjects
synthesis, crystal structure, fluorescent probe, cyanide ion, real sample detection, Chemistry, QD1-999
Abstract

We have designed and synthesized a novel simple colorimetric fluorescent probe with aggregation-induced emission (AIE) properties. Probe 5-(4-(diphenylamine)phenyl) thiophen-2-formaldehyde W exhibited a turn-on fluorescent response to cyanide ion (CN−), which induces distinct visual color changes. Probe W exhibited a highly selective and sensitive ratiometric fluorescence response for the detection of CN− over a wide pH range (4–11) and in the presence of common interferents. The linear detection of CN− over the concentration range of 4.00–38.00 µM (R2 = 0.9916, RSD = 0.02) was monitored by UV-Vis absorption spectrometry (UV-Vis) with the limit of detection determined to be 0.48 µM. The linear detection of CN− over the concentration range of 8.00–38.00 µM was examined by fluorescence spectrophotometry (R2 = 0.99086, RSD = 0.031), and the detection limit was found to be 68.00 nM. The sensing mechanisms were confirmed by 1H NMR spectroscopic titrations, X-ray crystallographic analysis, and HRMS. Importantly, probe W was found to show rapid response, high selectivity, and sensitivity for cyanide anions in real water samples, over the range of 100.17∼100.86% in artificial lake water and 100.54∼101.64% in running water by UV-Vis absorption spectrometry, and over the range of 99.42∼100.71% in artificial lake water and 100.59∼101.17% in running water by fluorescence spectrophotometry. Importantly, this work provides a simple and effective approach which uses an economically cheap and uncomplicated synthetic route for the selective, sensitive, and quantitative detection of CN− ions in systems relevant to the environment and health.

Published
2022
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2. Dynamic Coordination between a Triphenylamine-Functionalized Salicylaldehyde Schiff Base and a Copper(II) Ion

Author

Xing Zhang, Xian Jiong Yang, Hong Xu, Xing Feng, Carl Redshaw, Tao Sun, Qi Long Zhang, Shou Ting Wu, Ya Li Huang, and Ling Yi Shen

Subjects
Schiff base, 010405 organic chemistry, Ligand, chemistry.chemical_element, 010402 general chemistry, Triphenylamine, 01 natural sciences, Copper, 0104 chemical sciences, Ion, Inorganic Chemistry, Metal, chemistry.chemical_compound, chemistry, Salicylaldehyde, visual_art, Mass spectrum, visual_art.visual_art_medium, Physical chemistry, Physical and Theoretical Chemistry
Abstract

The coordination between a ligand and a metal is a spontaneous and uncontrollable process. In this Article, we successfully observe the formation of metal coordination in a triphenylamine-functionalized salicylaldehyde Schiff base with a copper(II) ion. The ligand TPA-Py first reacts with Cu2+ in a stepwise process to afford the dynamic complex TPA-Py@Cu2+ ([ligand]:[Cu2+] = 1:1), which further reacts with an extra copper(II) ion to afford 2TPA-Py@4Cu2+ with the following stepwise (or cumulative) stability constants: K1 = 4.0694 × 103 and K2 = 1.0761 × 106, respectively. The entire metal coordination process can be visualized, and the coordination mode of the probe toward copper was further evaluated by ultraviolet-visible/fluorescence spectra, single-crystal X-ray diffraction, density functional theory calculations, high-resolution mass spectra, and nuclear magnetic resonance spectroscopic titrations. Compound TPA-Py exhibited excellent sensitivity and specificity toward copper(II) ions in THF/water media with a low limit of detection of 2.687 × 10-7 mol L-1. In addition, TPI-An-Py can be applied to the detection of Cu2+ in real samples with satisfactory recoveries in the range of 100-112% in lake water and 98-101% in tap water. This Article not only reports an excellent fluorescence probe for copper(II) ion detection but also presents an instance for more fully understanding the metal coordination process.

Published
2021

3. Twisted Schiff-base macrocycle showing excited-state intramolecular proton-transfer (ESIPT): assembly and sensing properties

Author

Hong Xu, Bi-Xue Zhu, Ya-Li Huang, Qing Yu, Huaiyu Chen, Shou-Ting Wu, Xiaodong Zhang, Xin-Long Ni, and Qi-Long Zhang

Subjects
chemistry.chemical_classification, Schiff base, Ion sensing, Metals and Alloys, Excited state intramolecular proton transfer, Nanoparticle, General Chemistry, Photochemistry, Fluorescence, Catalysis, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, Coordination complex, chemistry.chemical_compound, chemistry, Materials Chemistry, Ceramics and Composites
Abstract

A Schiff-base macrocyclic host (MH) showing ESIPT and AIEE is reported for the first time; the fluorescent macrocycle exhibited good pH tolerance and could serve as a probe for Cu2+ and Fe3+ ion sensing and removal. In addition, a series of size-tunable nanoparticles was fabricated by the self-assembly of free MH and its coordination complex with Fe3+ in THF/water solution.

Published
2020

4. Synthesis, Crystal Structure and Bioactivity of Phenazine-1-carboxylic Acylhydrazone Derivatives

Author

Xian-Jiong Yang, Xi Liang, Qi-Long Zhang, Carl Redshaw, Ya-Li Huang, Lingyi Shen, Hong Xu, Hua Liu, Ning Wu, Fang Luo, and Shou-Ting Wu

Subjects
crystal structure, Cell Survival, Phenazine, Hydrazine, Pharmaceutical Science, Hydrazone, Antineoplastic Agents, phenazine-1-carboxylic acid, Hydrazide, Medicinal chemistry, Article, Analytical Chemistry, Structure-Activity Relationship, chemistry.chemical_compound, QD241-441, Aniline, Drug Discovery, Humans, Physical and Theoretical Chemistry, Cell Proliferation, chemistry.chemical_classification, Dose-Response Relationship, Drug, Molecular Structure, Organic Chemistry, Hydrazones, Condensation reaction, acylhydrazone compounds, anticancer activity, chemistry, A549 Cells, Chemistry (miscellaneous), Alkoxy group, Phenazines, Molecular Medicine, Drug Screening Assays, Antitumor, Hydrate, HeLa Cells
Abstract

A phenazine-1-carboxylic acid intermediate was synthesized from the reaction of aniline and 2-bromo-3-nitro-benzoic acid. It was then esterified and reacted with hydrazine hydrate to afford phenazine-1-carboxylic hydrazine. Finally, 10 new hydrazone compounds 3a–3j were obtained by the condensation reaction of phenazine-1-carboxylic acid hydrazide and the respective aldehyde-containing compound. The structures were characterized by 1H and 13C NMR spectroscopy, MS and single crystal X-ray diffraction. The antitumor activity of the target compounds in vitro (HeLa and A549) was determined by thiazolyl blue tetrazolium bromide. The results showed that compound (E)-N′-(2-hydroxy-4-(2-(piperidine-1-yl) ethoxy) benzyl) phenazine-1-carbonyl hydrazide 3d exhibited good cytotoxic activity.

Published
2021

5. Crystal structure of 4-(3-(pyridin-3-yl)ureido)benzoic acid — adipic acid (2/1), C16H16N3O5

Author

Qi-Long Zhang, Chong Wu, Shou-Ting Wu, and Juan Zou

Subjects
Adipic acid, Crystallography, 010405 organic chemistry, Crystal structure, 010402 general chemistry, Condensed Matter Physics, 01 natural sciences, Medicinal chemistry, 0104 chemical sciences, Inorganic Chemistry, chemistry.chemical_compound, chemistry, QD901-999, General Materials Science, Benzoic acid
Abstract

C13H11N3O3 ⋅ C3H5O2, triclinic, P1̄ (no. 2), a = 9.6481(6) Å, b = 10.0123(6) Å, c = 10.1667(6) Å, α = 116.680(2)°, β = 113.268(2)°, γ = 95.809(2)°, V = 758.31(8) Å3, Z = 2, R gt(F) = 0.0426, wR ref(F 2) = 0.1212, T = 293(2) K.

Published
2020

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