RSC Advances
·
2023
·Vol. 13
·期 34
·23812-23817
·
IF 3.9
Gao Liang,Zheng Minghao,Liu Haiyi,Xiao Jun,Gong Tianhao,Liu Kunming,Li Juanhua,Liu Jinbiao
A 2-(2′-hydroxyphenyl)benzimidazole (HBI)-based ratiometric fluorescent probe, known as BTEP, was synthesized using 5-bromosalicylaldehyde as the raw material via Sonogashira coupling and condensation reaction. This probe was designed for rapid detection of boron trifluoride solutions and gases. The N and O coordination atoms in the probe undergo a boron difluoride addition with BF3, which affects the process of excited state intramolecular proton transfer (ESIPT) leading to a blue shift of fluorescence emission. Obvious changes in the fluorescence signal can be observed within 60 seconds. The introduction of an acetylene trimethylsilane fragment increases the conjugate plane and is beneficial to improving the selectivity of the probe. The I408/I479 fluorescence ratio of the probe displays a linear relationship with the concentration of BF3 in the range of 5–50 μM, with a detection of limit as low as 69.5 nM. Furthermore, the probe demonstrates specific and selective recognition of BF3 among eight common interference substances. Test strips prepared using BTEP have the capability of real-time naked-eye detection of trace BF3 gas.
研究领域:
分析化学
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材料科学
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DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2018
·Vol. 28
·期 46
·1804759
·
IF 13.325
Maolin Yu,Peisheng Zhang,Baiju P. Krishnan,Hong Wang,Yong Gao,Shu Chen,Rongjin Zeng,Jiaxi Cui,Jian Chen
Switchable organic fluorescent materials are attracting much interest in many fields including flexible display, information storage, anti-counterfeit, and bioimaging, due to their prominent properties and relatively low cost. Herein, a class of novel photoswitchable fluorescent polymeric nanoparticles (PFPNs) toolbox that shows switchable full-colored emission including white light is described. This nanoparticles toolbox consists of a series of reversibly photoswitchable and non-PFPNs with red, green, and blue fluorescence, and is built up from three primary fluorescent dyes and a photochromic diarylethene molecule, through a facile one-pot miniemulsion method. The as-prepared PFPNs display the merits of high fluorescence resonance energy transfer efficiency and fluorescence quantum yield, rapid responsiveness, prominent photoreversibility, and brilliant long-term fluorescence stability ( ≈ 6 weeks). They enable switchable emission between white light and any visible color on-demand in both solution and film states. Their potential in complex fluorescent encryption and photoswitchable white light-emitting diode is described and its great potential in anti-counterfeiting technology, data encryption, and the next generation of optoelectronic materials is foreseen.
研究领域:
材料科学
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光学
·
生物成像
·
信息存储
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2016
·
IF 7.145
Xiaowan Li,Ligang Chen
A new fluorescence probe constructed with a multifunctional nanocomposite, Fe3O4–ZnS:Mn2+/SiO2–NH2, was successfully synthesized and then used to detect folic acid in real serum samples. The nanocomposite was characterized by fluorescence spectroscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, X-ray powder diffraction, and physical property measurement system. With the addition of analyte, the Fe3O4–ZnS:Mn2+/SiO2–NH2 composite and folic acid formed a new complex because cross-linking of the amino and carboxyl groups participated in the condensation reaction. Then, the energy of quantum dots was transferred to the complex and led to quenching of the fluorescence. Moreover, the fluorescence intensity decreased significantly as the concentration of folic acid increased, and the fluorescence quenching ratio F0/F was related to the folic acid concentration in the range from 0.1 to 5 μg mL–1. This method was used for detecting folic acid in real serum samples and gave recoveries in the range of 89.0%–96.0%, with relative standard deviations of 1.2%–3.9%. The detection limit was 9.6 ng mL–1 (S/N = 3). These satisfactory and simple results showed the great potential of this fluorescence probe in the field of pharmaceutical analysis.
研究领域:
分析化学
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纳米技术
·
药物分析
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PubMed
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2017
·
IF 7.78
Qian Qian Zhang,Bin Bin Chen,Hong Yan Zou,Yuan Fang Li,Cheng Zhi Huang
Hematin plays a crucial role in various physiological functions, and the determination of hematin in complex biological matrixes is a significant but difficult issue. Considering the unique photophysical/photochemical properties of carbon quantum dots (CQDs) prepared with p-aminobenzoic acid (PABA) and ethanol, a new strategy for the design of fluorescent probes for hematin has been achieved. The proposed sensor array is fabricated based on the inner filter effect (IFE) between hematin and CQDs with phenomenon of selective fluorescence quenching of CQDs which results from the strong absorption of the excitation and emission spectrum of CQDs by hematin. The fluorescence quenching of CQDs is closely related to the amount of hematin and there is a good linear relationship over the range of 0.5–10 μM with a detection limit of 0.25 μM. What's more, the fluorescence assay has been successfully applied for hematin sensing in healthy human red cells showing this sensing assay has a great potential prospect for detection of hematin in the complex matrixes .
研究领域:
分析化学
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生物医学工程
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光谱学
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PubMed
高影响因子
MICROCHIMICA ACTA
·
2018
·Vol. 185
·期 10
·1-8
·
IF 5.705
Wang Xuan,Yang Xuefang,Wang Ning,Lv Junjie,Wang Haojiang,Choi Martin M. F.,Bian Wei
A rapid method has been developed for the determination of Hg(II) and sulfide by using graphitic carbon nitride quantum dots (g-CNQDs) as a fluorescent probe. The interaction between Hg(II) and g-CNQDs leads to the quenching of the blue g-CNQD fluorescence (with excitation/emission peaks at 390/450 nm). However, the fluorescence can be recovered after addition of sulfide such that the “turn-off” state is switched back to the “turn-on” state. The g-CNQDs were fully characterized by transmission electron microscopy, X-ray diffractometry, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, UV-vis absorption and fluorescence spectroscopy. Under the optimal experimental conditions, this probe is highly selective and sensitive to Hg(II). The linear response to Hg(II) extends from 0.20 to 21 μM with a detection limit of 3.3 nM. In addition, sulfide can be detected via the recovery of fluorescence. The linear response range for sulfide species is from 8.0 to 45 μM with a detection limit of 22 nM. The mechanism of the “turn-off-on” scheme is discussed. The methods have been applied to the analysis of spiked tap water, lake water and wastewater samples.
Schematic of an off-on fluorescent probe for mercury(II). The fluorescence of graphitic carbon nitride quantum dots (g-CNQDs) is quenched by Hg 2+ but is recovered after reacting with S 2− as it can combine with Hg 2+ on the surface of g-CNQDs.
研究领域:
分析化学
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环境科学
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材料科学
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DOI
PubMed
高影响因子
DYES AND PIGMENTS
·
2022
·
IF 5.122
Heng Wu,Jie Zhao,Xi Nan Yang,Dan Yang,Li Xia Chen,Carl Redshaw,Li Guo Yang,Zhu Tao,Xin Xiao
A system comprising cucurbit[8]uril (Q[8]) and a fluorescent molecule (E)-1-(2-hydroxyethyl)-4-(4-hydroxystyryl)pyridin-1-ium bromide (HPy) has been utilized to construct a fluorescent probe that is capable of detecting the pesticide tricyclazole (TC). A variety of techniques including 1 H NMR spectroscopy together with fluorescence experiments have been employed to investigate the host-guest properties of the Q[8]/HPy system in aqueous solution. Results indicate that the system forms the stable2:1 inclusion complex HPy 2 @Q[8], and that this inclusion complex imparts fluorescent quenching on HPy. The addition of a number of pesticides was found to have no obvious effect on the fluorescence, however on addition of tricycazole (TC), the fluorescence intensity underwent a dramatic enhancement. The linear relationship between the fluorescence intensity and the concentration of TC allowed for the facile detection of TC concentration in aqueous target solutions as well as in agricultural products. The detection limit was found to be 3.70 × 10 −8 mol L −1 .
研究领域:
分析化学
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环境科学
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2018
·
IF 5.667
Long Yu,Yingyun Li,Huan Yu,Kui Zhang,Xiaowan Wang,Xinfeng Chen,Ji Yue,Tianxi Huo,Hongwei Ge,Khalid A. Alamry,Hadi M. Marwani,Suhua Wang
Ozone is widely used in air sterilization, food and medical disinfection in modern society, but high ozone levels in the living environment are considered harmful and have been associated with various respiratory diseases. Therefore, quick detection for ozone of part per million (ppm) levels is significant for living environment and an excited-state intramolecular proton transfer (ESIPT) compound has been synthesized. Due to an intrinsic excited-state intramolecular proton transfer (ESIPT) process, this “off-on” probe can fluoresce in the solid-state. This intrinsic fluorescent property makes it easy to detect lower concentration of ozone since the reaction product of probe can avoid being affected by pH and solubility through luminescence in the solid-state. The limit of gaseous ozone detection can be as low as 0.28 ppm for obviously distinguishable fluorescence colour from blue to cyan, showing that the probe can be useful for detecting ozone without the need of elaborate equipment.
研究领域:
环境科学
·
分析化学
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DOI
高影响因子
Inorganics
·
2024
·Vol. 12
·期 4
·93
·
IF 3.1
Gao-Sheng Zhu,Yi Jia,Jia-Yao Ding,Hao Yin,Yan Chen,Bao-Yi Yu,Yan-Ying Zheng,Francis Verpoort
In this work, a fluorescent complex [Zn(NTD)2(DTP)2(H2O)2]·(H2O)0.8(Complex Zn), (H2NTD = 1,4-naphthalenedicarboxylic acid and DTP = 3,5-di(1,2,4-triazol-1-yl)pyridine) was synthesized. The fluorescent complex was characterized by single-crystal X-ray diffraction, powder X-ray diffraction, and thermogravimetric, elemental, infrared spectroscopy, and fluorescence analyses. In the fluorescence sensing tests, Complex Zn exhibited excellent fluorescence quenching efficiency towards Fe3+, MnO4−, Cr2O72−, nitrofurantoin, and imidacloprid in aqueous media. A mechanism investigation suggested that the fluorescence quenching caused by the quenchers toward the sensor was due to the inner filter effect and the fluorescence resonance energy transfer effect in the fluorescent sensing process.
研究领域:
化学
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环境科学
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分析化学
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DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Jianglong Deng,Lintao Chen,Hao Chen,Jiazhuang Guo,Cai-Feng Wang,Su Chen
Carbon dots (CDs) have attracted increasing attention due to their remarkable optical characteristics and broad application prospects. Here, we report an efficient and mild strategy for the rapid preparation of green-emissive CDs (G-CDs) via a microwave-assisted approach. The G-CDs were synthesized via microwave-assisted thermal treatment of m-phenylenediamine (m-PD) and phthalic acid in ethylene glycol for 10 min, followed by purification. The resultant G-CDs exhibit a bright green photoluminescence (PL) centered at 515 nm with an absolute quantum yield (QY) of 66.5%. Structural characterization revealed that the G-CDs possess a highly graphitized carbon core and are enriched with various surface functional groups. Mechanistic studies on fluorescence indicated that the green emission of G-CDs originates from the interaction between the surface-attached green fluorophore, phenazine-2,7-diamine (2,7-DAP), and the graphitized carbon core. In addition, the prepared G-CDs/polyvinylpyrrolidone (G-CDs/PVP) composite film exhibits excellent optical properties and was successfully applied in the fabrication of green light-emitting diodes (LEDs). This study might promote the understanding of the fluorescence mechanism and the development of preparation methods for high-performance G-CDs based on m-PD.
研究领域:
材料科学
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光学
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DOI
高影响因子
LUMINESCENCE
·
2024
·Vol. 39
·期 10
·e4916
·
IF 3.2
Chen Wang,Wenheng Li,Xiaohong Wang,Dongshan Xiang,Kun Zhai
In this paper, a highly sensitive method for sulfur ion (S 2− ) detection was developed based on a four-color fluorescence probe constructed from copper-containing metal–organic framework (CuBDC) and four dye-labeled single-strand DNA (ssDNA). In the absence of S 2− , dye-labeled ssDNA can be adsorbed on the surface of CuBDC, and the dyes are close to copper ion on the CuBDC surface, their fluorescence is quenched by copper ion, and their fluorescence signals are weak. In the presence of S 2− in the system, S 2− reacts with copper ion in CuBDC to form CuS, which has a more stable structure than complex CuBDC, resulting in the decomposition of CuBDC. In this case, dye-labeled ssDNA are detached from the CuBDC surface and dissolved in the solution, and the fluorescence of the dyes is restored. Under the optimized conditions, there is a good linear relationship between the total fluorescence intensity of four dyes and the concentration of S 2− in the range of 2 × 10 −9 to 5 × 10 −8 mol/L; the detection limit is 2.2 × 10 −10 mol/L. The method has a good selectivity and accuracy, and it can be applied to the analysis and detection of S 2− in actual water samples.
研究领域:
分析化学
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环境科学
·
材料科学
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DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2019
·
IF 2.931
Qiujuan Ma,Chunyan Wang,Yu Bai,Junhong Xu,Juan Zhang,Zhengkai Li,Xiaoyu Guo
Hypochlorous acid (HClO) is an important reactive oxygen species (ROS) and plays a significant role in living organisms. Highly selective and lysosome-targetable probes for sensing hypochlorous acid are rare. In this article, we designed and prepared a new lysosome-targeting and ratiometric fluorescent probe for monitoring the levels of hypochlorous acid. 4-Aminonaphthalimide was chosen as the fluorescent group and (2-aminoethyl) thiourea group was used as a specific recognition group for HClO. A morpholine unit was employed as a lysosome-targeting group. In the absence of HClO the probe underwent intramolecular charge transfer (ICT) and showed a green emission. When excess HClO is present, the ICT process was interrupted which caused a 57 nm blue-shift of fluorescence emission from 533 nm to 476 nm. The ratiometric fluorescent probe showed outstanding selectivity toward HClO over other various bioactive species. Furthermore, the ratiometric fluorescent probe exhibited rapid response time and ability of working in a wide pH range. The linear response of I 476nm /I 533nm toward HClO was obtained in a concentration range of HClO from 1.0 × 10 −6 to 1.0 × 10 −4 mol·L −1 . The detection limit was estimated to be 8.0 × 10 −7 mol·L −1 for HClO. Moreover, the probe showed a perfect lysosome-targeting ability, and has been successfully used to the confocal imaging of HClO in lysosomes of HepG2 cells with little cell toxicity. All of such good properties illustrated that it could be applied to determine HClO at lysosomes in living cells.
研究领域:
生物化学
·
细胞生物学
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PubMed
高影响因子
CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
·
2021
·
IF 1.134
Ke-Xin WANG,Chen NIE,Rui-Fang GUAN,Hao ZHANG
In recent years, unconventional fluorescent molecules without conjugated rings have attracted widespread interest due to their excellent fluorescence properties, simple preparation process, good water solubility and excellent biocompatibility. Dual emission fluorescent probes are usually more accurate and sensitive, for eliminating the influence of environmental factors. This work provides a novel strategy to construct double emission fluorescent probes based on unconventional fluorescent molecules and fluorescein isothiocyanate. The aqueous solution of resulting double emission polymer dots ( f-PDs ) shows two fluorescence emission peaks centered at 440 nm and 510 nm under excitation at 363 nm. According to change of these two peaks after adding ions, Cu 2+ and ClO − are judged quantitatively. Cu 2+ or ClO − are also quench fluorescence of f-PDs linearly, as Cu 2+ combines with polyethyleneimine parts of f-PDs to form complexes, while ClO − oxidize hydroxyl groups on the surface of f-PDs . The detection limits of Cu 2+ and ClO − , in an aqueous solution are 6.7 nM and 14.0 nM, respectively.
研究领域:
分析化学
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生物医学
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DOI
高影响因子
危险品化学品经营许可证（带存储）