ANALYTICA CHIMICA ACTA
·
2020
·
IF 5.977
Tiancheng Sun,Sue Hao,Ruiqing Fan,Jian Zhang,Wei Chen,Ke Zhu,Ping Wang,Xikui Fang,Yulin Yang
Developing portable membrane sensors to accurately detect the biomolecule ascorbic acid (AA) is extremely important for food safety and human health. Herein, we successfully design and synthesize a novel cationic metal organic framework (Eu-pbmc, Hpbmc = 2-(pyridine-2-yl)-1H-benzimidazole-5-carboxylic acid) and assemble polyacrylonitrile/Eu-pbmc membrane (PEM) by an in-situ growth strategy. Benefiting from the appreciable loading of Eu-pbmc nanoparticles and high water permeation flux, PEM possesses effective detection for MnO 4 − with a limit of detection (LOD) of 17 nM. Utilizing the cationic porous framework, we load MnO 4 − into PEM and construct a “on-off-on” system for effective AA detection. The oxidative MnO 4 − can be reduced by AA and the resulting turn-on luminescence can reflect the concentration of AA. Compared with pure Eu-pbmc crystals, PEM exhibits improved AA detection performance with LOD of 48 nM and detection time of 1 min via a concise detection operation. The stable membrane sensor realizes an accurate detection in real biological samples, meeting the practical requirement. Moreover, an IMP logic gate is helpful to analyze MnO 4 − and AA in water. The proposed novel luminescence platform as well as reasonable “on-off-on” luminescence mode provide a promising method for AA detection.
研究领域:
分析化学
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材料科学
·
生物医学工程
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2026
·
IF 3.2
Weiwei Cheng,Shuyue Xu,Chengnan Wang,Jinyi Dong,Weina Jiang,Yunshan Xue
Industrial emissions of heavy metal ions and oxygen-containing anions, antibiotic residues caused by pharmaceutical and agricultural activities, and toxic ions such as Fe 3+ introduced by nuclear industry leaks, collectively form a complex water pollution. Here, we report the successful synthesis of a novel europium-based metal-organic framework (Eu-MOF) through a hydrothermal approach employing a flexible V-shaped dicarboxylic acid ligand. The single crystal X-ray diffraction results indicate that the Eu-MOF belongs to the orthorhombic crystal system. Its basic structural unit is a one-dimensional coordination chain, which is further assembled by hydrogen bonding and π - π stacking between molecules, ultimately forming a stable three-dimensional supramolecular structure. Leveraging the intense red emission of Eu 3+ and its robust structural integrity, the Eu-MOF demonstrates remarkable sensitivity and specificity in the fluorescence detection of Fe 3+ , MnO 4 − , and nitrofurantoin (NFT) in aqueous solutions, featuring low detection limits and substantial quenching constants. Mechanism studies have shown that the structure of the material remains stable during the sensing process, and fluorescence quenching is mainly caused by the combined effects of static quenching, competitive absorption, and photo-induced electron transfer. This research introduces a dependable multifunctional luminescent platform for the swift and precise monitoring of various hazardous environmental contaminants.
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产品关联
DOI
高影响因子
LUMINESCENCE
·
2026
·Vol. 41
·期 9
·e70613
·
IF 2.8
Dajie Zou,Chenyan Lu,Huye Li,Xiaohua Xu,Min Ma,Chengdangzhi Wen,Huan Wang,Jiuli Wang
Dopamine hydrochloride (DPH) is a key neurotransmitter, and its dysregulated concentration has been linked to various neurological disorders. Meanwhile, potassium permanganate (MnO 4 − ), a potent oxidant, poses significant environmental risks when discharged in excess. Therefore, sensitive detection of MnO 4 − and DPH is essential. In this work, nitrogen, sulfur, and fluorine tridoped carbon dots (N,S,F-CDs) were prepared through a hydrothermal route using Aconitum pendulum Busch extract as a biomass-derived carbon source, with thiourea and sodium fluoride serving as heteroatom dopants. The obtained N,S,F-CDs exhibited bright blue emission, good aqueous dispersibility, and a fluorescence quantum yield of 43.16%, with strong emission at 408 nm under 345-nm excitation. Upon addition of MnO 4 − , the fluorescence was efficiently suppressed owing to the combined contribution of inner-filter effect and dynamic quenching. Subsequent introduction of DPH reduced MnO 4 − and recovered the fluorescence signal, enabling the construction of an “ON–OFF–ON” sensing platform. Under optimized conditions, the sensor displayed linear responses of 5.03–275.23 μM for MnO 4 − and 6.11–371.02 μM for DPH, with detection limits of 0.25 and 0.68 μM, respectively. The method was further applied to tap water, serum, and orange juice samples with satisfactory recoveries, indicating its potential for environmental and bioanalytical detection.
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DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2022
·
IF 5.876
Zhiqiang Zhou,Yuanping Liao,Huiyan Wu,Qi Xiao,Yi Liu,Liyun Yang
Herein, zeolitic imidazolate framework-8 capped gold nanoclusters (AuNCs@ZIF-8) was fabricated and developed as an “on-off-on” fluorescent nanoprobe for selectively and sensitively detecting KMnO 4 and ascorbic acid (AA). The prepared AuNCs@ZIF-8 initially exhibited strong fluorescence at 595 nm KMnO 4 could quench the fluorescence of AuNCs@ZIF-8, rendering the fluorescence signal of AuNCs@ZIF-8 in the “off” state. The probe allows KMnO 4 to be detected with a 10 nM detection limit and the linear analytical range was 0.05–2 μM. When AA was added into the AuNCs@ZIF-8/KMnO 4 system, the fluorescence of the AuNCs@ZIF-8 recovered due to the redox reaction between KMnO 4 and AA, and the fluorescence signal of the system turned “on”. The detection limit of AA was 37 nM in a good linear concentration range of 0.05–5 μM. Furthermore, this AuNCs@ZIF-8 nanoprobe was successfully used for AA detecting in fresh orange juices with the recoveries ranged from 96.6% to 108.2%, which validates the potential applicability of this strategy.
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
Advanced Composites and Hybrid Materials
·
2022
·Vol. 5
·期 3
·2378-2386
·
IF 11.806
Chen Wenjing,Lin Hong,Wu Yunying,Yang Meng,Zhang Xianjing,Zhu Shihua,He Maoting,Xie Jianxin,Shi Zhengjun
Nitrogen-doped carbon dots (N-CDs) were prepared from A uricularia auricula (L.ex Hook.) Underw via a one-step hydrothermal method. The N-CDs were spherical with an average particle size of 2.85 nm. The optimal excitation and emission wavelengths were 324 nm and 400 nm, respectively. There was considerable overlap between the excitation or emission spectrum of N-CDs and the UV absorption band of MnO 4 − . The inner filter effect (IFE) was formed between N-CDs and MnO 4 − , which led to the fluorescence quenching of N-CDs. The fluorescence quenching intensity of the system showed a good linear relationship with the concentration of MnO 4 − from 0.15 to 9.00 μM, and the limit of detection (LOD) of MnO 4 − was 0.12 μM. The proposed method was then used to measure MnO 4 − in polluted water with recoveries of 99.42 to 101.16%. The synthesized N-CDs offering trace MnO 4 − detection in simulation sample are extremely profound for environmental evaluation. Graphical abstract N-CD fluorescent probes were facile prepared from biomass Auricularia auricula Underw for the sensing of MnO 4 − based on IFE.
研究领域:
环境科学
·
分析化学
✓ 已验证
DOI
高影响因子
CRYSTENGCOMM
·
2020
·Vol. 23
·期 2
·482-491
·
IF 3.117
Lin-Hui Wu,Shu-Li Yao,Jing Li,Hui Xu,Teng-Fei Zheng,Sui-Jun Liu,Jing-Lin Chen,He-Rui Wen
A novel luminescent CdII-based metal–organic framework {[Cd(BBIP)(TBIP)]·EtOH}n (1) derived from the multidentate 5-tert-butylisophthalic acid (H2TBIP) and the semi-rigid N-donor 3,5-bis(benzimidazol-1-yl)pyridine (BBIP) has been solvothermally synthesized and structurally characterized by using infrared spectroscopy, thermal analysis, single-crystal X-ray diffraction and powder X-ray diffraction. The adjacent CdII ions are linked by two carboxylate groups of one TBIP2− ligand with chelating mode to form a one-dimensional CdII-TBIP2− chain, which is further connected by the BBIP ligand to obtain a two-dimensional network. Interestingly, the fluorescence experiments indicate that 1 could be considered as a good multi-responsive sensing material for detecting Fe3+, MnO4−, Cr2O72−, salicylaldehyde (SA) and ethylenediamine (EDA) via the turn-off effect, with the detection limits of 0.53, 0.98, 3.6, 0.42 and 5.3 ppm, respectively. The luminescence quenching effect induced by Fe3+ could be mainly ascribed to the competitive absorption mechanism. The electron-transfer transition and competitive absorption mechanism could be used to explain the luminescence quenching of MnO4− and Cr2O72−. The turn-off effect of 1 on SA could be ascribed to the photoinduced electron-transfer and competitive absorption mechanisms. Meanwhile, the possible mechanism of fluorescence quenching caused by EDA could be attributed to the structure collapse. More importantly, 1 could be regenerated and reused after five cycles for Fe3+, MnO4−, Cr2O72− and SA detection. In a nutshell, 1 could be employed as a multi-responsive luminescent sensor used for the highly selective and sensitive detection of metal ions, anions and small organic molecules.
研究领域:
材料科学
·
分析化学
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DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2022
·
IF 5.304
Panpan Wang,Junxia Wang,Tingting Liu,Zhengpeng Sun,Ming Gao,Kai Huang,Xuedong Wang
As one kind of high nutrition fruits, abandoned loquat causes great waste due to short storage period. For resource utilization, we herein fabricated the loquat fruit-based carbon quantum dots (CQDs) by a facile/green hydrothermal method. The as-fabricated CQDs showed spherical shape with an average size of 4.46 nm, and richness in functional hydroxyl and carboxyl moieties on their surface. Under daylight and UV light, the as-fabricated CQDs displayed light yellow and blue color, respectively, with a fluorescence quantum yield of 10.36%. Upon the addition of MnO 4 − , the fluorescence intensity of loquat-based CQDs was prominently quenched in a concentration-dependent manner, suggesting the feasibility for constructing a sensitive “ON-OFF” nanoprobe. By virtue of changes in UV-Vis absorption, fluorescence lifetime, Stern-Volmer constant and zeta potential, the MnO 4 − -triggered quenching mechanisms were attributable to the joint action of inner filter effect and static quenching. Under optimized conditions, the CQDs supplied wide linear range of 0.2–150 μM, low detection limit of 0.06 μM, and high recovery of 96.0–106.0% for MnO 4 − in environmental waters. Especially, it exhibited the superior selectivity and anti-inference capacity for other commonly existed cations and anions in waters. In contrast to China authentic indirect iodometry method and previously reported approaches, the newly developed “ON-OFF” nanoprobe possesses comparable or even better analytical performance. As far as our information goes, it is the first report on the loquat fruit-based CQDs for successful application in the assay of trace-level MnO 4 − in environmental waters, thereby showing great potential in conventional monitoring.
研究领域:
环境科学
·
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）