CHEMICAL ENGINEERING JOURNAL
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2021
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IF 13.273
Shenghui Han,Gang Lian,Xu Zhang,Zhaozhen Cao,Qilong Wang,Deliang Cui,Ching-Ping Wong
Developing metal-free room-temperature phosphorescence (RTP) materials with ultralong lifetimes in dry and wet states simultaneously has been widely concerned due to their potential applications, which is also a tough challenge up to now. Herein, a smart construction strategy is proposed to in-situ embed boron nitride dots (BNDs) into an isogenous B 2 O 3 matrix. The BND-based materials exhibit unexpected bluish-green RTP in solid and various wet conditions (water, oxidants, organic solvents, strong acids and bases). The RTP lifetime of them in powder is as long as ~ 1.7 s, lasting over 10 s to naked eye. B 2 O 3 matrix can not only uniformly disperse the BNDs in it, but also provide a rigid environment via forming hydrogen-bonded and covalently bonded interactions between them to strongly stabilize the triplet states excitions on the dots from nonradiative deactivation. More interestingly, RTP quenching of the BND-based powder in various solutions is effectively suppressed because the B 2 O 3 matrix is not collapsed in them. For instance, the RTP lifetime in water is as long as ~ 0.9 s. Based on the distinctive RTP properties in dry and various harsh wet states, the applications of the BND-based RTP materials in multi-level anti-counterfeiting and information encryption are demonstrated.
研究领域:
材料科学
·
光学
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产品关联
DOI
高影响因子
TALANTA
·
2018
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IF 4.244
Zhijiao Tang,Jiani Yang,Gongke Li,Yuling Hu
In this work, a strategy of sulfur-rich doped nitrogen dots (S-Ndots) based on a single-source precursor (SSP) was developed and applied to sensing of Hg 2+ . Fluorescent S-Ndots were synthesized by microwave-assisted method using 2-azidothiazole as a single-source precursor, which served as carbon, nitrogen and sulfur source simultaneously. This SSP approach guarantee efficient core doping and improve the effect of doping in a molecular level, which is more efficient and simpler than the doping strategy with multiple precursors. The results showed that the as-synthesized S-Ndots have high sulfur component up to 24.6%, and their specific structure effectively promoted artificial peroxidase activity and coordination interaction. Interestingly, the fluorescence intensity could be quenched obviously and the peroxidase activity of the S-Ndots were selectively inhibited by Hg 2+ , then the S-Ndots were applied to the dual-mode sensing of Hg 2+ with both fluorometric and colorimetric readout. The S-Ndots-based sensing assay with simplicity and rapidity showed high selectivity to Hg 2+ with the detection limit of 0.1 μmol/L by fluorescence spectroscopy and a distinguishable change in the color was observed by the naked eye. In addition, the accuracy and precision were evaluated based on the quantitative detection of Hg 2+ in industrial waste water samples with satisfactory results. Moreover, the S-Ndots with good biocompatibility were further explored for imaging of Hg 2+ in A549 cells. As a novel member of nitrogen quantum dots family, the S-Ndots hold great promise to broaden its applications in environmental and biological sensing.
研究领域:
材料科学
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环境科学
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生物分析化学
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产品关联
DOI
PubMed
高影响因子
ANALYTICA CHIMICA ACTA
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2020
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IF 5.977
Zhijiao Tang,Zhengyi Chen,Gongke Li,Yuling Hu
The development of sensitive fluorescence sensors and efficient preparation of samples is a challenge in the detection of pesticides in complex samples. In this study, multicolor nitrogen dots (M-Ndots) were synthesised via microwave irradiation at 140 °C for 10 min with 5-amino-1H-tetrazole and p-phenylenediamine as precursors, which have a high fluorescence quantum yield of up to 31%. Furthermore, the M-Ndots were employed as fluorescence sensors for pesticide detection by being combined with a gas membrane separation device, to eliminate the interference from the complex sample matrix. In this process, the M-Ndots were used for sensing thiram and chlorpyrifos through their affinities to Cu 2+ and Fe 3+ , respectively. Because thiram could decompose into volatile CS 2 , its derivate was sensed using the fluorescence of M-Ndots via a complexation reaction with Cu 2+ . Chlorpyrifos, due to its volatility, can reduce the Fe 3+ ion by inhibiting the activity of acetylcholinesterase , which produces H 2 O 2 to oxidise Fe 2+ . In a real application, the time consumption for 96 samples was less than 30 min in one run of the gas membrane separation device. The recoveries for thiram and chlorpyrifos ranged from 90.0% to 115.0%, and the analytical results were validated using LC-MS/MS methods, with relative errors ranging from −7.4% to 10.1%.
研究领域:
分析化学
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食品安全
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产品关联
DOI
PubMed
高影响因子
CRYSTENGCOMM
·
2023
·Vol. 25
·期 39
·5533-5540
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IF 3.1
Xu Zhang,Shenghui Han,Gang Lian,Deliang Cui,Qilong Wang
Matrix- and metal-free phosphorescence materials with long room-temperature lifetime and high-temperature phosphorescence properties have attracted tremendous attention but seldom reported. Herein, a universal fluorination strategy was proposed to obtain a series of matrix-free fluorinated boron nitride dots (F-BNDs) with markedly extended lifetime by constructing rigid F-induced hydrogen-bond networks. Miraculously, when the F-BNDs(e) were heated to 150 °C, the afterglow was temperature-controlled and still maintained with a lifetime as long as 0.25 s. In terms of their interesting phosphorescence properties, this work actually provides a guiding strategy to realize F-BND phosphorescence materials with time-resolved and temperature-controlled lifetime encoding characteristics. Widespread applications in higher-level information encryption, time-resolved information displaying, dynamic multidimensional anti-counterfeiting and colorless security ink were demonstrated.
研究领域:
材料科学
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化学
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产品关联
DOI
高影响因子
FOOD CHEMISTRY
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2025
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IF 9.8
Jinling Wang,Ning Liu,Zhenrun Li,Peilin Wang,Qiang Ma
In this study, a novel quasi-solid hydrogel-based electrochemiluminescence (ECL) sensor was developed to detect enrofloxacin (ENR) in milk. First, nitrogen-rich quantum dots ((5-AT- co -CA)-N-dots) with high luminescence efficiency were synthesized and served cathodic ECL luminophores. Second, the P(AM- co -AMPS)-PEDOT:PSS (PAMES) hydrogel was prepared as a quasi-solid electrolyte. The hydrogel exhibited high ionic conductivity (52.5 mS cm −1 ), excellent adhesion properties, high transparency (83 %), and high water content (89 %). The ECL signal of (5-AT- co -CA)-N-dots was enhanced by 4.3 times in is PAMES hydrogel compared to the solution. The solventless sensing system based on quasi-solid hydrogel electrolyte addressed the limitations of leakage and instability of traditional liquid electrolytes, thereby improving the portability and environmental adaptability of the sensor. Furthermore, a molecularly imprinted sensing system was constructed to detect ENR based on the PAMES hydrogel. This novel ECL sensor significantly simplified the operations and expanded s potential sensing applications.
研究领域:
分析化学
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食品科学
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产品关联
DOI
PubMed
高影响因子
NEUROCHEMICAL RESEARCH
·
2025
·Vol. 50
·期 5
·1-12
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IF 3.8
Huang Manqian,Tang Meiling,Liu Lu
Epilepsy is a chronic neurological disorder featured by abnormal neural discharges that can lead to cognitive impairment. Salidroside (Sal), a biologically active component, protects neurons against various insults. The current study aims to explore the therapeutic potential of Sal in epilepsy and elucidate the mechanisms underlying its effects. We established a rat model of status epilepticus (SE) using pentylenetetrazol-kindling. SE rats were treated with Sal. Assessment of seizure latency and epileptic stage scores were performed. Cognitive function of rats was evaluated using a novel object recognition test and a Morris water maze test. Neuronal damage and hippocampal pathology were examined, alongside microglial and astrocyte activation, complement C3-C3a receptor (C3-C3aR) pathway involvement, and inflammatory factor levels. Sal prolonged seizure latency, decreased epilepsy stage scores, and improved cognitive performance compared to untreated SE rats. Furthermore, Sal suppressed the activation of C3-C3ar, microglia, and astrocytes, while decreasing the levels of inflammatory factors, which ameliorated hippocampal damage and neuronal loss. Sal may attenuate epilepsy and cognitive dysfunction by downregulating complement C3-C3aR pathway-mediated activation of microglia and astrocytes.
研究领域:
神经病学
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药理学
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神经药理学
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免疫学
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分子生物学
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神经科学
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）