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fluorescent detection of Cu(Ⅱ) by Chitosan-based AIE Bioconjugate

Chinese Journal of Polymer Science 2017年第3期35卷 365-371页

作者： Ya-lan Liu 王征科 Wei Qin 胡巧玲唐本忠 Ministry of Education Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and Engineering Zhejiang University Hangzhou 310027 China Key Laboratory of Adsorption and Separation Materials & Technologies of Zhejiang Province Hangzhou 31002 7 China Department of Chemistry Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction Hong Kong University of Science and Technology Clear Water Bay Hong Kong China

detection of Cu（Ⅱ） is very important in disease diagnose, biological system detection and environmental monitoring. Previously, we found that the product TPE-CS prepared by attaching the chromophores of tetraphenylethylene（TPE） to the chitosan（CS） chains showed excellent fluorescent properties. In this study, we tried to use TPE-CS for detecting Cu（Ⅱ） because of the stable complexation of CS with heavy metals and the luminosity mechanism of the Restriction of Intramolecular Rotations（RIR） for aggregation-induced emission（AIE）-active materials. The fluorescence intensity changed when TPE-CS was contacted with different metal ions, to be specific, no change for Na;, slightly increase for Hg;, Pb;, Zn;, Cd;, Fe;, Fe;due to the RIR caused by the complexation between CS and metal ions. However, for Cu;, an obvious fluorescence decrease was observed because of the Photoinduced-Electron-Transfer（PET）. Moreover, we found that the quenched FL intensity of TPE-CS was proportional to the concentration of Cu（Ⅱ） in the range of 5 μmol/L to 100 μmol/L, which provided a new way to quantitatively detect Cu（Ⅱ） . Besides, TPE-CS has excellent water-solubility as well as absorbability（the percentage of removal, R = 84%）, which is an excellent detection probe and remover for Cu（Ⅱ） .

关键词： Aggregation-induced emission Chitosan Cu(Ⅱ) fluorescent detection

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A new Eu-MOF for ratiometrically fluorescent detection toward quinolone antibiotics and selective detection toward tetracycline antibiotics

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Chinese Chemical Letters 2022年第3期33卷 1353-1357页

作者： Chao-Yang Wang Chong-Chen Wang Xiu-Wu Zhang Xue-Ying Ren Baoyi Yu Peng Wang Zi-Xuan Zhao Huifen Fu Beijing Key Laboratory of Functional Materials for Building Structure and Environment Remediation/Beijing Energy Conservation&Sustainable Urban and Rural Development Provincial and Ministry Co-construction Collaboration Innovation Center Beijing University of Civil Engineering and ArchitectureBeijing 100044China Key Laboratory of Urban Agriculture(North China) Ministry of AgricultureCollege of Biological Sciences EngineeringBeijing University of AgricultureBeijing 102206China

Development of new self-calibrating fluorescent sensing methods has been a popular research field with the aim of protecting the human health and environment sustainability. In this work, a novel Eu-based metal organic framework(MOF) Eu(2,6-NDC)(COO)(BUC-88) was developed by employing 2,6-NDC(2,6-naphthalenedicarboxylic acid) as bridging ligands. BUC-88 performed different sensing process toward quinolone antibiotics and tetracyclines antibiotics in terms of fluorescence intensity and color. BUC-88exhibited excellent selectivity and sensitivity detection property toward enrofloxacin(ENR), norfloxacin(NOR) and ciprofloxacin(CIP) over other Pharmaceutical and Personal Care Products(PPCPs), accomplishing the detection limit of 0.12 μmol/L, 0.52 μmol/L, 0.75 μmol/L, respectively. Notably, BUC-88 acted as an excellent fluorescence sensor for tetracyclines antibiotics with fast response time(less than 1 s), high selectivity and sensitivity(LODs = 0.08 μmol/L). The fluorescent detection method was successfully used for visual and ultrasensitive detection of ENR, NOR, CIP and tetracycline hydrochloride(TC) in lake water with satisfied recovery from 99.75% to 102.30%. Finally, the photoinduced electron transfer and the competitive absorption of ultraviolet light are the main mechanisms for sensitive detection toward quinolone antibiotics and tetracyclines antibiotics.

关键词： Metal-organic framework fluorescent detection Sensor Quinolone antibiotics Tetracyclines antibiotics

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Elaborate Design of Two Novel fluorescent Zinc-based Metal-Organic Frameworks for Highly Efficient Tetracycline Antibiotics detection

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Chemical Research in Chinese Universities 2024年第3期40卷 499-507页

作者： TAO He JI Chengshan ZHANG Jian YIN Yuanyuan JIA Wenwen JIANG Xin XU Jie YANG Yulin MIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001P.R.China

The abuse of tetracycline antibiotics has caused great harm to human health and *** inexpensive,convenient and sensitive methods for the detection of tetracycline antibiotics is highly ***,based on the H_(4)ddp ligand[H_(4)ddp=3-(3,5-dicarboxyphenyl)pyridine-2,6-dicarboxylic acid],two novel zinc-based metal-organic frameworks(MOFs){[Zn_(3)(ddp)_(2)(H_(2)O)_(4)]·3H_(2)O}n(Zn1-ddp)and{[Zn_(3)(ddp)_(2)(H_(2)O)_(4)]·3H_(2)O}n(Zn2-ddp)were successfully designed by delicate structural *** Zn1-ddp and Zn2-ddp exhibited excellent water and chemical stability and showed excellent fluorescence quenching performance for tetracycline ***,the more advanced framework structure and better fluorescent performance make Zn1-ddp more sensitive than Zn2-ddp in fluorescent detection with a detection limit of 0.29µmol/L for tetracycline(TC),0.09µmol/L for doxycycline(DOX),0.10µmol/L for minocycline(MIN)and metacycline(MEL),0.19µmol/L for chlortetracycline(CTC),and 0.67µmol/L for oxytetracycline(OTC)among tetracycline *** fluorescence quenching mechanism of Zn1-ddp and Zn2-ddp for tetracycline antibiotics detection was deeply *** reasons for the superior detection performance of Zn1-ddp over Zn2-ddp were also analyzed in depth through Fourier transform infrared spectrophotometry(FTIR),X-ray photoelectron spectroscopy(XPS)analysis and framework structure *** developed method opens up a new perspective for antibiotics detection based on zinc-based MOFs.

关键词： Water system Metal-organic framework fluorescent detection Tetracycline antibiotic

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A fluorescent In (Ⅲ) Metal-Organic Framework for Explosives detection

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Chemical Research in Chinese Universities 2023年第6期39卷 1005-1009页

作者： LI Wen LIU Xinyao LI Guanghua LIU Yunling State Key Laboratory of Inorganic Synthesis&Preparative Chemistry College of ChemistryJilin UniversityChangchun 130012P.R.China Sinochem Holdings Corporation Ltd. Beijing 100031P.R.China

Anovel metal-organic framework{[In_(3)(TATAT)_(2)]·3CH_(3)NH_(3)·7NMF·8H_(2)O}[JLU-MOF101,H_(6)TATAT=5,5′,5″-(1,3,5-triazine-2,4,6-triyl)tris-(azanediyl)triisophthalate,NMF=N-methyl-formamide]with cor topology has been synthesized under solvothermal *** framework of JLU-MOF101 is constructed by{In(COO)_(4)}-nodes and a hexacarboxylic organic ***-MOF101 exhibits excellent fluorescence properties in N,N-dimethylformamide(DMF)solution,and its emission spectrum can be greatly overlapped with the ultraviolet absorption spectra of trinitrophenol(TNP)and 2,4-dinitrophenol(2,4-DNP).As a result,JLU-MOF101 exhibits excellent performance of fluorescence quenching for TNP and 2,*** addition,we demonstrate the selective detection capability of JLU-MOF101 through a large number of anti-interference tests.

关键词： Selective detection Indium metal-organic framework fluorescent detection Nitroaromatic explosive

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A fluorescent dinuclear Zn（Ⅱ） complex for the detection of an explosive—2,4,6-trinitrophenol

A fluorescent dinuclear Zn（Ⅱ） complex for the detection o...

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中国化学会第九届全国无机化学学术会议

作者： Tianrong Li Yongliang Shao Zhengyin Yang College of Chemistry and Chemical Engineering Lanzhou University

2,4,6-trinitrophenol（TNP）has become a significant environmental pollutant due to its explosibility and biotoxicity[1].Many works on the detection of TNP have already been reported in the past few years[2];however,the combination of high selectivity,low detection limit,and high quenching efficiency is still the major requirement for materialization of TNP sensors[3].In the present research,a ligand（H2L,Fig.1a）was synthesised by the condensation of4-（diethylamino）salicylaldehyde with 8-aminoquinoline,and its Zn（Ⅱ）complex,[Zn2（μ2-L）（μ2-CH3COO）2Cl]（1,Fig.1b）,was also formed by H2L and Zn（Ac O）2·2H2O in Me OH/CHCl3（1:1,V/V）.In CHCl3,96%fluorescence emission of 1 can be quenched by 6 equivalent of TNP（Fig.2a）,and compared to other nitroaromatics and analogues,such as phenol（PN）,nitrobenzene（NB）,o-nitrophenol（NP）,p-nitrotoluene（p NT）,m-nitrotoluene（m NT）,salicylic acid（SA）,high selectivity have also been showed by 1 for TNP（Fig.2b）.After reaction with TNP,1 is converted into 2（Fig.1c）.A combination of static and dynamic quenching mechanism for 1 with TNP is supported by Stern-Volmer plots,time resolved emission studies,absorption spectra titrations,and X-ray crystal structure determination.

关键词： 2 4 6-trinitrophenol Zn(Ⅱ) complex fluorescent detection quenching mechanism

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Fluorescence Turn-On/Off Responses of In(Ⅲ)-MOF to Short-Chain Perfluorocarboxylic Acids

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Transactions of Tianjin University 2023年第3期29卷 216-224页

作者： Jie Lv Yabo Xie Lin-Hua Xie Jian-Rong Li Beijing Key Laboratory for Green Catalysis and Separation Department of Chemical EngineeringBeijing University of TechnologyBeijing 100124China

Short-chain perfluorocarboxylic acids(PFCAs) are a class of persistent organic pollutants that are widely used as substitutes for long-chain PFCAs. However, they also pose a non-negligible risk to ecosystems. In this study, we demonstrated that a fluorescent metal–organic framework(MOF)(named V-101) constructed from In^(3+)and an aromatic-rich tetratopic carboxylate ligand 5-[2,6-bis(4-carboxyphenyl) pyridin-4-yl] isophthalic acid(H4BCPIA) exhibited highly efficient turn-off and turn-on fluorescence responses toward five short-chain PFCAs in water and methanol, respectively. The limits of detection of V-101 toward five short-chain PFCAs are down to μg/L level, and it showed good anti-interference abilities toward short-chain PFCAs in the presence of common metal ions. The major mechanisms associated with fluorescence responses were molecular collisions and interactions between V-101 and short-chain PFCAs. This work demonstrates that the structure variety of MOFs imparts them with the potential of MOFs in the detection of short-chain PFCAs for pollution control.

关键词： Perfl uorocarboxylic acids fluorescent detection Metal–organic framework(MOF)

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Temperature-dependent photoluminescence of highly luminescent water-soluble CdTe quantum dots

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Chinese Chemical Letters 2009年第8期20卷 977-980页

作者： Ji Wei Liu Yu Zhang Cun Wang Ge Yong Long Jin Sun Ling Hu Ning Gu State Key Laboratory of Bioelectronics Jiangsu Key Laboratory for Biomaterials and Devices Southeast University Nanjing 210096 China School of Chemistry and Chemical Engineering Southeast University Nanjing 210096 China Department of Chemistry Nantong University Nantong 226007 China

Highly luminescent water-soluble CdTe quantum dots （QDs） have been synthesized with an electrogenerated precursor. The obtained CdTe QDs can possess good crystallizability, high quantum yield （QY） and favorable stability. Furthermore, a detection system is designed firstly for the investigation of the temperature-dependent PL of the QDs. ？2009 Yu Zhang. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.

关键词： Quantum dots Temperature-dependent photoluminescence fluorescent detection

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Laboratory-Scale Evaluation of Single Analyte Bacterial Monitoring Strategies in Water Injection Systems

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Journal of Sensor Technology 2016年第2期6卷 11-26页

作者： Mohammed A. Al-Moniee Susanne Juhler Ketil Sørensen Xiangyang Zhu Thomas Lundgaard Fahad N. Al-Abeedi Peter F. Sanders Saudi Arabian Oil Company (Saudi Aramco) Dhahran Saudi Arabia Danish Technological Institute (DTI) Aarhus Denmark

Microbial activity is the cause of a variety of problems in water injection systems, e.g., microbial corrosion, plugging, and biofouling. Efficient monitoring of Saudi Aramco’s vast water injection system requires the development of online and automated technologies for monitoring microbial activities in the system. A previous system review and technology screening has identified five single-analyte strategies [1], which were evaluated in this study with a laboratory-scale setup to determine their applicability for automated determination of microbial activity in the injection water system. Four of the five single-analyte measuring principles tested in the laboratory setup were deemed less suitable for automation and/or reliable for use in the detection of microbial activity in the company injection water system. These four principles were: luminescence assay for adenosine-5’-triphosphate (ATP), detection and electrochemical measurements of H2S, determination of pH by electrochemical sensor, and measurement of oxidation-reduction potential (ORP). The strategy of staining cells with fluorescent DNA dyes, followed by quantification of fluorescence signals, was identified to hold, with proper optimization of DNA staining and fluorescence detection, a very promising potential for integration in automated, online sensors for microbial activity in the injection water system.

关键词： Microbial Sensors DNA Staining fluorescent detection Automated Monitoring Injection Water

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