DYES AND PIGMENTS
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2021
·
IF 4.889
Fanyong Yan,Jingru Sun,Yueyan Zang,Zhonghui Sun,Hao Zhang,Jinxia Xu,Xiang Wang
MXene quantum dots (MQDs) derived from MXene with photoluminescent properties have attracted considerable attention. Herein, nitrogen-doped MQDs (N-MQDs) were constructed by a solvothermal method using Ti 3 C 2 MXene as precursors and o-phenylenediamine (oPD) as the nitrogen source. The morphology, element composition and optical properties of N-MQDs were investigated by transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS) and spectroscopy etc. The obtained N-MQDs are dispersed quasi-spherical nanoparticles , mainly composed of carbon, oxygen and nitrogen, with yellow fluorescence at 580 nm and quantum yield of 5.42 %. In further, N-MQDs can detect Alizarin Red (ARS) based on inner filter effect (IFE) with linear range and detection limit of 0–80 μM and 1.21 μM, respectively. N-MQDs can detect ARS in real water samples, and were expected to have further applications in the fields of environmental monitoring and biosensing.
研究领域:
材料科学
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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
ANALYTICAL SCIENCES
·
2026
·
IF 2
Wang Anqing,Jiang Xiaorui,Duan Dingding
A sensitive electrochemical sensor for the detection of methotrexate (MTX), a widely used anticancer and anti‑autoimmune drug, was constructed. MTX monitoring is of great significance for reducing toxic side effects and guaranteeing clinical medication safety. The sensor was based on a glassy carbon electrode (GCE) modified with a nanocomposite of molybdenum disulfide (MoS 2 ) nanosheets loaded with gold gold nanoflowers (AuNFs), followed by the electrochemical polymerization of alizarin red (AR) to form a stable polymeric film (PAR) on its surface. The MoS 2 nanosheets were prepared via liquid-phase exfoliation, and the AuNPs were deposited onto them via electrodeposition. The morphology of the modified electrode (PAR/Au@MoS 2 /GCE) was characterized by scanning electron microscopy (SEM), and its electrochemical properties were investigated using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The synergistic effect of the nanocomposite and the conductive polymer significantly enhanced the electrocatalytic activity towards MTX oxidation. Under optimized conditions, the oxidation peak current of MTX at the modified electrode was nearly six times higher than that at a bare GCE. The sensor exhibited a linear response to MTX concentrations ranging from 0.4 to 38.6 µM, with a low detection limit of 0.027µM (S/ N = 3). The sensor demonstrated excellent reproducibility, stability, and selectivity. Its practical applicability was successfully validated by determining MTX content in commercial tablet formulations with satisfactory recoveries. Graphical abstract A PAR/Au@MoS 2 /GCE electrochemical sensor was fabricated via sonication, electrodeposition, and electropolymerization for the sensitive detection of methotrexate.
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高影响因子
MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 11
·1-11
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IF 5.3
Yang Jingqi,Wang Xinru,Yu Ying,Cao Yujuan,Guo Manli,Hu Xiaogang,Wang Li,Lin Bixia
By combining boric acid-modified carbon dots ( p -CDs) and alizarin red (ARS), a double emission probe p -CDs@ARS with fluorescence at 410 nm and 600 nm is designed for the detection of glyphosate. When Cu 2+ is added, it binds with ARS to cause ARS release from p -CDs@ARS, which decreases the fluorescence at 600 nm. However, in the presence of glyphosate, glyphosate competes to the binding of Cu 2+ , releasing ARS to bind with p -CDs again. Therefore, the fluorescence of 600 nm recovers. Based on this, the fluorescence of 410 nm and 600 nm act as the reference and response signal, respectively, achieving the ratiometric fluorescence detection of glyphosate. The linear range of glyphosate detection is 0.5–50 µM with a limit of detection at 0.37 µM which is well below the maximum residue limit for glyphosate in food. When the probe is used to detect the glyphosate residue in Pearl River water and cucumber, the detection results are well consistent with those detected by HPLC. The established method based on p -CDs@ARS has the advantages that the assembly of ratiometric fluorescence probe is simple, and the detection speed is fast. Additionally, a typical INHIBIT logical system has been successfully constructed based on glyphosate, Cu 2+ , and the fluorescence signal of p -CDs@ARS. Graphical
研究领域:
分析化学
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环境科学
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DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2016
·Vol. 4
·期 16
·3415-3421
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IF 5.066
Haiqin Wu,Lan Jin
In this study, new facile, economical and fluorescent ultrathin films (UTFs) for detection of tiopronin are developed. The UTFs have been fabricated by combining the alizarin red S–boric acid adduct (ARS–H3BO3) with MgAl layered double hydroxide (LDH) nanoparticles through the layer-by-layer (LBL) assembly technique. UV-vis, fluorescence spectroscopy, XRD, SEM and AFM have been adopted to monitor the assembly process. The UTFs display a uniform morphology and a periodic layered structure. Using ARS as a probe, which does not emit fluorescence by itself but displays fluorescence when complexed with boron, the assembled ARS–H3BO3/LDH UTFs display a high luminescence response to tiopronin. In the presence of Cu2+, the fluorescence of UTFs was quenched, which is attributed to the complexation between Cu2+ and ARS. Upon adding tiopronin to the UTF–Cu system, tiopronin would form a complex with Cu2+ preferentially, leading to the increased fluorescence of UTFs. Based on the above mechanism, a turn-on fluorescent ensemble for tiopronin is developed. A linear response was obtained in the range of 0–80 ng mL−1, with a detection limit of 0.47 ng mL−1. Compared with ARS and other analytes, the tighter binding of tiopronin to Cu2+ led to an assay with high specificity. Therefore, this work provides a facile LBL strategy for the fabrication of a solid state sensor based on ARS dye for detection of tiopronin.
研究领域:
分析化学
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材料科学
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生物医学
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DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2024
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IF 4.3
Zhifeng Cai,Yixuan Zhang,Manlin Zhao,Jinjia Bao,Ling Lv,Haoyang Li
Copper nanoclusters (FA@CuNCs) emitting blue fluorescence were successfully developed via a one-pot technique. In this method, the copper chloride, folic acid and hydrazine hydrate were applied as a precursor, protective agent and reducing agent, respectively. The absorption, fluorescence excitation and emission spectra of FA@CuNCs were carried out by using ultraviolet–visible and fluorescence spectrometry, respectively. The morphology, particle size, functional groups, oxidation states of elements of FA@CuNCs were discussed via using transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS). The stability of FA@CuNCs was studied under various conditions, such as storage time at 25 ℃, ultraviolet radiation time, sodium chloride solutione and pH. The FA@CuNCs displayed blue fluorescence under the excitation wavelength of 361 nm, and the fluorescence quantum yield was 7.45 %. As a result of the inner filter effect, the alizarin red could significantly weaken the blue fluorescence of FA@CuNCs. Thus, the as-prepared FA@CuNCs could be utilized as fluorescence nanosensors for the trace determination of alizarin red. This platform suggested an excellent linear range for alizarin red varying from 0.5 to 200 μM with a fitting coefficient of 0.9955. The detection limit was calculated to be 0.064 μM in the light of the 3b/k (b and k refer to the standard deviation and slope of fitted curve, respectively). Furthermore, the as-developed FA@CuNCs could be used to detect the alizarin red in real samples and for the sensing of temperature.
研究领域:
化学
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材料科学
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分析化学
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DOI
PubMed
高影响因子
ANALYTICAL CHEMISTRY
·
2018
·
IF 6.042
Dongxia Chen,Jingjin Zhao,Liangliang Zhang,Rongjun Liu,Yong Huang,Chuanqing Lan,Shulin Zhao
Calcium ion (Ca2+) plays crucial roles in the signal transduction pathways associated with various physiological and pathological events. Monitoring intracellular Ca2+ is of great significance for cell biology research. Here, we report the use of biomass quantum dots (BQDs) as a fluorescent reporter for imaging of intracellular Ca2+, based on the inner-filter-mediated luminescence which was assisted by a Ca2+ chelator alizarin red S (ARS). BQDs were prepared by hydrothermal heating of capsicum. The absorption of ARS overlaps with the excitation of the BQDs, the fluorescence of BQDs being quenched through the inner-filter effect. But the absorption of Ca-ARS complex red shifts and shows a poor inner-filter effect. Thus, Ca2+ can be detected by the inner-filter-mediated luminescence using the BQDs-ARS nanohybrid system. Using the proposed nanosystem, the imaging of intracellular Ca2+ and real-time monitoring of the Ca2+ level change under histamine stimulation were also achieved. Thus, this nanosystem holds potential applications in other Ca2+-related signal transduction study.
研究领域:
细胞生物学
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纳米技术
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生物医学工程
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荧光成像
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DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2017
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IF 5.951
Qiang Liu,Qinze Liu,Zhuotong Wu,Yang Wu,Tingting Gao,Jinshui Yao
We report a novel composite absorbent prepared by the simple method that catechol-amine resin coats the hydrocellulose based on the adhesion property like polydopamine. The composite which contains many chelating groups on its surface was characterized by scanning electron microscopy (SEM), infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), etc. The obtained adsorbents were investigated to remove Methyl Orange (MO) and Alizarin Red S (AR) from pH-unregulated aqueous system by batch experiments, including the affected factors of adsorbent dosage, contact time, initial concentration, and temperature. Results showed the adsorption processes belonged to the chemisorption and exhibited a spontaneous and endothermic nature. Besides, the removal performances fitted with the Langmuir isotherm model and pseudo-second order kinetic model very well. The maximum adsorption amounts of MO and AR were 189.39 and 284.09 mg/g at 303 K, respectively. The difference about adsorption amounts may be caused by the strong effect of π–π conjugation and hydrogen bonding between adsorbent and AR. Furthermore, the adsorption processes exhibited a spontaneous and endothermic nature. The recycling test indicated that the adsorbent stayed stable for the removal of both dyes by desorbed three times. Accordingly, the adsorbent with high adsorption capacity and rapid removal rate should be a promising material for the removal of anionic dyes from sewage.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 29
·期 60
·90530-90548
·
IF 5.19
Dovi Evans,Aryee Aaron Albert,Liu Mingyu,Zhang Xiaoting,Kani Alexander Nti,Li Jianjun,Han Runping,Qu Lingbo
Recent progress has been made in the application of novel zirconium-loaded amine-grafted walnut shells as multifunctional adsorbents for the remediation of Alizarin red (AR) and bacteria in aqueous solutions. The morphology and functional groups of ACWNS@Zr were studied using Brunauer–Emmett–Teller (BET) techniques, X-ray diffraction (XRD), pH point of zero charges (pHpzc), scanning electron microscopy (SEM), and Fourier transform infrared (FTIR) spectroscopy. Adsorption and regeneration tests were carried out in batch and column mode. The ACWNS@Zr had a Langmuir maximum capacity of 415.5 ± 6.1 mg g −1 at 303 K. The spread plate technique was used to evaluate the adsorbent’s antimicrobial properties against Staphylococcus aureus and Escherichia coli . ACWNS@Zr exhibited inhibitory potential towards S. aureus and E. coli in the suspensions by 53.3% and 15.0%, respectively. Electrostatic interaction and complexation interaction could be the key mechanisms governing AR dye removal. Equilibrium isotherms fit Langmuir models better for both batch and column studies, while adsorption kinetics to pseudo-second-order and Thomas models for batch and column studies, respectively. Thermodynamic studies indicated that the adsorption process was endothermic and spontaneous. Furthermore, columns’ mass transfer capacity ( B ) increased as the concentration increased due to the enhanced driving force for AR adsorption onto ACWNS@Zr. Regeneration with NaOH solution of AR-loaded ACWNS@Zr was remarkable. Graphical abstract
研究领域:
环境科学
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材料科学
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DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2014
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IF 4.517
Xin Zhang,Youli Wei,Yaping Ding
A glassy carbon electrode modified with poly(alizarin red)/electrodeposited graphene (PAR/EGR) composite film was prepared and applied to detect ciprofloxacin (CPFX) in the presence of ascorbic, uric acid and dopamine. The morphology and interface property of PAR/EGR films were examined by scanning electron microscopy (SEM) and electrochemical impedance spectroscopy (EIS). The electrocatalytic oxidation of CPFX on AR/EGR was investigated by cyclic voltammetry (CV) and differential pulse voltammetry (DPV). The linearity ranged from 4 × 10 −8 to 1.2 × 10 −4 M with a detection limit (S/N = 3) of 0.01 μM. The modified electrode could be applied to the individual determination of CPFX as well as the simultaneous determination of CPFX, ascorbic acid, uric acid and dopamine. This method proved to be a simple, selective and rapid way to determine CPFX in pharmaceutical preparation and biological media.
研究领域:
分析化学
·
电化学
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DOI
高影响因子
MACROMOLECULES
·
2017
·
IF 5.835
Wen-Ming Wan,Shun-Shun Li,Dong-Ming Liu,Xin-Hu Lv,Xiao-Li Sun
Electron-deficient borinic acid monomers and corresponding polymers were synthesized with different substituents via a one-pot reaction of Grignard reagents with trimethoxyborane and reversible addition–fragmentation chain transfer polymerization, respectively. Further investigations of substituent effects of borinic acid polymers (PBAs) were carried out, indicating that the thermoresponsive properties of PBAs benefit from the increase of steric hindrance of PBA substituent, while the binding affinity of PBAs with Alizarin Red S, 8-hydroxyquinoline (HQ), and fluoride ion decreases with the increase of steric hindrance of substituent. Attributed to the strong dative N → B bond and the strongly luminescent boron quinolate, the application of phenyl PBA for fluorescence detection of HQ is realized with high sensitivity at the ppm level. These results therefore confirm that borinic acid-containing polymer is a new type of stimuli-responsive polymer in the field of thermoresponsiveness over a wide temperature range and chemical sensor for diol and electron-rich compounds.
研究领域:
材料化学
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分析化学
·
高分子科学
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DOI
高影响因子
危险品化学品经营许可证（带存储）