LUMINESCENCE
·
2023
·Vol. 38
·期 2
·159-165
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IF 2.9
Linlin Lv,Weiwei Luo,Yixiao Zhou,Tiechun Li,Quanping Diao,Pinyi Ma,Daqian Song
Hydrazine (N 2 H 4 ) is a highly toxic and harmful chemical reagent. Fluorescent probes are simple and efficient tools for sensitive monitoring of N 2 H 4 enrichment in the environment, humans, animals, and plants. In this work, a ratiometric fluorescent probe (FP-1) containing coumarin was used for hydrazine detection. The proposed FP-1 probe had a linear detection range of 0–250 μM and a limit of detection (LOD) of 0.059 μM (1.89 ppb). A large red Stokes shift was observed in fluorescence and UV–vis absorption spectra due to the hydrolysis of ester bonds between FP-1 and hydrazine. The hydrazine detection mechanism of FP-1 was also investigated using density functional theory (DFT) calculations. Finally, FP-1 could sensitively and selectively monitor hydrazine in actual water samples and BEAS-2B cells. Therefore, it has great application potential in environmental monitoring and disease diagnosis.
研究领域:
环境科学
·
生物化学
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产品关联
DOI
PubMed
高影响因子
DIAMOND AND RELATED MATERIALS
·
2021
·
IF 3.315
Hao Zhang,Zihan Yuan,Mingkun Wang,Lin Zhu,Xiao Cheng,Duxia Cao,Ruifang Guan,Chuanjian Zhou
Graphene quantum dots (GQDs) are a new type of carbon material that have received widespread attention in recent years. However, due to their complex structure, it is difficult to explore their fluorescence emission mechanism and application mechanism. In this work, GQDs with simple structure were prepared using citric acid as a single precursor. The fluorescence properties and structure of GQDs were characterized, and the results confirmed that their luminescence originated from the n → π* electronic transition produced by the oxygen-containing functional groups in the edge state. Significantly, GQDs can be used as excellent probes to detect Hg 2+ and ClO − in aqueous solution. Hg 2+ combines with the carboxyl groups of the edge states of GQDs to form a complex, and then reduces the fluorescence emission through non-radiative electron transfer . ClO − can oxidize the hydroxyl groups in the edge states of GQDs to make them positively charged, which prevents electron transfer related to the luminescent center and reduces fluorescence emission.
研究领域:
分析化学
·
材料科学
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产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Shuting Shen,Chengfei Liu,Wenxin Fan,Kunyan Sui
Ionic skins (I-skins) hold significant potential for mimicking the complex sensory functions of human skin. However, they suffer from unstable sensing performance because the water content and temperature of I-skins are susceptible to the surrounding environment. Here, a self-detection sensing mechanism designed to address this critical issue, ensuring stable perception of multiple stimuli in I-skins, is introduced. It is demonstrated that gradient polyelectrolyte (GP) conductors possess two parameters—resistance and self-induced potential—that are responsive to temperature and water content. Through establishing the functional relations of resistance and potential against temperature and water content based on the Nernst−Planck and Arrhenius equations, respectively, the temperature and water content of resulting GP I-skins can be self-detected/calculated in real-time from the measured resistance and potential signals. Such self-detection capability allows GP I-skins not only to self-calibrate their sensing parameters for accurate detection of mechanical stimuli across varying environmental conditions but also to discern surrounding temperature and humidity in accordance with Flory−Rehner theory. This self-detection sensing mechanism offers a powerful tool for developing I-skins capable of stable perception of multiple stimuli in changing environments without complex and undesired encapsulation.
研究领域:
材料科学
·
生物医学工程
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DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2019
·
IF 3.206
Juan Yue,Li Li,Peng Miao,Zheng Wang,Zhimin Chang,Dan Shao,Haohua Shao,Qian Mei,Shi-zhong Luo,Wen-Fei Dong
Adenine detection is important in biomedicine. Here, we report acriflavine-based carbon dots prepared via a one-step synthesis that can detect adenine in aqueous solution via fluorescence. Titration experiments show that the fluorescence intensity of carbon dots increases by up to 35% as the concentration of adenine increases. High-resolution transmission electron microscopy images show that carbon dots have a recognizable lattice structure. Based on this, we built a theoretical model using the DFT method to explain the mechanism by which adenine enhances fluorescence on the carbon dots.
研究领域:
生物医学
·
材料科学
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产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2019
·
IF 2.931
Fanyong Yan,Xiaodong Sun,Ruiqi Zhang,Yingxia Jiang,Jinxia Xu,Junfu Wei
Three enhanced fluorescence probes based on Rhodamine B-Schiff base structure were synthesized for detecting Cu 2+ . The corresponding detection limits were found to be 0.25 μM, 0.15 μM and 0.18 μM. Binding ratio and binding sites were determined by Job's and nuclear magnetic titration experiments. The binding constants obtained by the Benesi-Hildebrand equation to be 341.0 M −0.5 ,1.8 × 10 4 M −1 , and 265.4 M −0.5 , respectively. As isomers, the different effects of probes on Cu 2+ detection were researched. By adjusting the position and the size of the substituent group, the effects of binding sites and steric hindrance on the complexation ratio, response time and detection limit were discussed. Optimal spatial combination structure with Cu 2+ was obtained through energy calculation. Detection mechanism of Rhodamine B ring opening based on the complex of the Schiff base with Cu 2+ was confirmed. E. coli staining and detection of real water samples had expanded their applications.
研究领域:
分析化学
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生物化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF FLUORESCENCE
·
2024
·
IF 2.6
Pang Shukui,Yu Yanchao,Yan Xuexue,Wu Mianyuan,Liu Qiye,Zu Panru,Wu Canyao
A novel coumarinylhydrazone fluorescent probe L was designed and synthesized from 4-(diethylamino)salicylaldehyde, its structure was characterized by NMR, IR. Fluorescence emission spectra showed that in ethanol solution, probe L could form a 1:1 complex L-Cu 2+ with Cu 2+ to realize the "turn-off" detection of Cu 2+ with high specificity and sensitivity (3.7 × 10 –7 mol/L). Meanwhile, the complex L-Cu 2+ had a specific fluorescence-enhanced response to HPO 4 2− with a detection limits down to 5.6 × 10 –7 mol/L and was resistant to the effects of many common anions (NO 2 − , N 3 − , CO 3 2− , SO 3 2− , HPO 4 2− , I − , Br − , F − , HCO 3 − , SO 4 2− , NO 3 − , Cl − , CH 3 COO − , Cr 2 O 7 2− , S 2 O 3 2− , P 2 O 7 4− ). Detection mechanism could be HPO 4 2− captured Cu 2+ of the complex and released the free ligand L. At last, the complex L-Cu 2+ was successfully applied to the determination of HPO 4 2− in different environmental water samples, and the spiked recoveries ranged from 98.05% to 108.18% and the relative standard deviations of 0.75% ~ 2.9%, which had good application prospects. Graphical A new coumarin acyl hydrazone fluorescent probe L was designed and synthesized, which could specifically recognize Cu2+ and HPO42- in a relay manner. In addition, the probe had good prospects for practical applications.
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
Plasmonics
·
2017
·Vol. 13
·期 4
·1459-1465
·
IF 2.139
Yu Haili,Wang Zeru,Huang Wei
Here, we report a highly stable and sensitive colorimetric assay for Cr 3+ based on amido black 10B-stabilized silver nanoparticles (AgNPs) as the probes. The detection mechanism is that the coordination interaction between Cr 3+ and amido black 10B on the surface of AgNPs causes the cross-linking/aggregation of amido black-stabilized AgNPs, generating a redshift of the absorption peak and a color change from yellow to pink. Under the optimized assay conditions, this colorimetric assay displays a good linear relationship ( R
2 = 0.996) between relative absorbance ratios and the concentration of Cr 3+ in the range of 0.05–20 μM, and the limit of detection (LOD) was estimated to be 0.01 μM by the UV-Vis spectra and 15 μM by the naked eye. Additionally, the colorimetric assay shows a good selectivity over other metal ions, and it is successfully applied to detection of Cr 3+ in tap water, lake water, and river water samples with satisfactory recoveries.
研究领域:
分析化学
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环境科学
·
纳米技术
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DOI
高影响因子
Progress in Natural Science-Materials International
·
2023
·
IF 4.7
Haiyan Kang,Hongchao Geng,Sisi Shi,Zhongxian Song,Yuting Dong,Xiaole Yan,Chaohai Wang,Yanli Mao,Qingyun Cai
High concentrations of Cu 2+ exceeding what the required level for the cellular process can changes the properties of protein, affects the normal function of the body, but also affect the body's metabolism, so that the body's immunity appears to decline. Detection of Cu 2+ is important for the environmental monitoring. Here, a fluorescence probe that uses heavy metal-free and properties-superior CuInS 2 /ZnS was proposed for detection of Cu 2+ . The fluorescence intensity of CuInS 2 /ZnS quantum dots (QDs) decreased obviously after Cu 2+ were added, and the intensity with the concentration of Cu 2+ showed excellent linear relation within the scope of 0–50 μM, the LOD down to 0.45 μM, a possible detection mechanism was analyzed. The QDs was further applied to the detection of Cu 2+ in drinking water, manifesting the foreground of the current strategy.
研究领域:
生物化学
·
环境科学
·
分析化学
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产品关联
DOI
高影响因子
Food Analytical Methods
·
2024
·
IF 2.6
Lu Wen,Chen Jichao,Tang Jiongya,chen Yutian,Ma Yingying,Sang Wuhan,Feng Sicheng,Yang Shilong,Wang Yanqin,Li Xu
Zinc is an essential trace element and its deficiency has been related to skin conditions, Alzheimer’s disease, and some types of cancer. Therefore, detecting zinc ions in the human body with high sensitivity is important. Here, two “turn-on” quinoline-based fluorescent probes ( E )-2-((2-(quinolin-2-yl) hydrazono) methyl) phenol ( QSP-H ) and ( E )-4-chloro-2-((2-(quinolin-2-yl) hydrazono) methyl) phenol ( QSP-Cl ) were fabricated for the detection of Zn 2+ . Both the QSP-H and QSP-Cl revealed low LOD (71 nM for QSP-H , 67 nM for QSP-Cl ) and high selectivity, and worked across a broad pH range (3 ‒12 for QSP-H , 3 ‒11 for QSP-Cl ). The HRMS, 1 H NMR titration, DFT calculations and Job’s plot analysis were employed to explore the mechanism of Zn 2+ detection through QSP-H and QSP-Cl . QSP-H and QSP-Cl were effectively applied to the quantitative assessment of Zn 2+ in two infant formula samples and to the bioimaging-based detection of exogenous Zn 2+ in living cells.
研究领域:
分析化学
·
生物医学
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产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2022
·
IF 4.831
Yangmei Wu,Zhiyuan Meng,Fei Zhao,Shifa Wang,Zhonglong Wang,Yiqin Yang
Fe 3+ is the most abundant essential transition metal ion in the human body, plays a vital role in biological and environmental systems. Ethyl cellulose is one of the derivatives of cellulose. Herein, a novel ethylcellulose fluorescent probe EC-HPCB for detecting Fe 3+ was prepared by grafting a flavonol derivative as both fluorophore and selective recognition group. The probe exhibited a highly specific “turn-off” fluorescence response to Fe 3+ , and the fluorescence color changed from yellow to colorless in the presence of Fe 3+ . The detection limit of EC-HPCB for Fe 3+ was 2.65 × 10 −7 mol/L, and the response time was as quick as 2 min. The detection mechanism was confirmed by 1 H NMR and DFT calculations. Based on the good solubility and processability in organic solvent, EC-HPCB was made into coating and film with favorable fluorescent performances. Furthermore, EC-HPCB probe was successfully applied to monitor Fe 3+ in real water samples, and the EC-HPCB -loaded filter paper provided a solid-state platform for detecting Fe 3+ by naked eye and fluorescence method.
研究领域:
分析化学
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环境科学
·
生物化学
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产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Ping Chen,Nengli Dai
Detection of Fe 3+ ions is of paramount importance for environmental protection and human health. Herein, we reported a highly selective and sensitive fluorescence probe for the quantification of Fe 3+ ions in aqueous solution with Eu 3+ /SnO 2 nanocrystals co-doped silica glasses as the sensing unit. Due to the high stability of silica glasses and their efficient protection for emitting centers, the probe has good recyclability and can be applied in real water environment, indicating its potential for on-site sensing. The detection limit of Fe 3+ ions is 7.54 nmol/L. Experiments were carried out to verify that the probe shows excellent cross interference with other metal ions. The detecting mechanism can be ascribed to the excitation/emission absorption and energy transfer of Fe 3+ ions. Our work paves a novel way of semiconductor oxide nanocrystals for applications in optoelectronics .
研究领域:
环境科学
·
材料科学
·
分析化学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2022
·
IF 9.221
Huazi Wang,Zhaoqiang Liu,Tian Xie,Li Wang,Qinqin Xu,Miaomiao Chen,Zhen Zhang,Zijun Ma,Suhua Fan,Hai Wu
Developing fluorescent probes for the cyanide diagnosis is necessary as its extensive existence will seriously harm human health. Herein, the strategy for designing three novel probes came from our previously reported “turn-on” fluorescent probe , which was switched from a “turn-off” probe by inserting an electron-deficient benzothiadiazole (BTD) into a triphenylamine (TPA)-based dicyanovinyl (MT) compound with a phenyl group (Ph) as π-bridge (TPA-BTD-Ph-MT). To further investigate the effects of the electron-deficient group, BTD was firstly replaced by a stronger electron-deficient group of 2,3-diphenylquinoxaline (DPQ) to obtain TPA-DPQ-Ph-MT (P1). Based on P1 molecule, N-phenylcarbazole (PCZ), and thiophene (Th) were respectively used as a substitute to obtain PCZ-DPQ-Ph-MT (P2) and TPA-DPQ-Th-MT (P3) probes for investigating the effect of the electron donor and π-bridge on the fluorescent probe. P1 exhibited significant “turn-on” fluorescence response toward cyanide anion (CN − ) with the best sensitivity and anti-interference performance. The sensing mechanism of P1 toward CN − was demonstrated and a good linearity was obtained in the wide concentration range of 0.025–40.0 μM with a low detection limit of 0.058 μM. Furthermore, P1 was successfully employed to determine CN – in food samples and image CN – in living cells and BALB/c mice, revealing its great practical potential for discriminative detection CN – in the fields of food and biological studies. Therefore, the strategy based on structure regulation provided good prospects for optimizing fluorescent probes.
研究领域:
分析化学
·
生物医学
·
食品科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）