Advanced Optical Materials
·
2024
·Vol. 12
·期 22
·2400648
·
IF 8
Shiwei Zhang,Jiurong Li,Xiao Gong
Carbon nanodots (CDs) possess exceptional fluorescence properties, which have been extensively studied in the fields of fluorescence detection and anti-counterfeiting information. However, the exploration of CDs with simple and fast synthesis paths, secure, and efficient encryption properties, remains a challenge. The rapid synthesis of orange CDs (O-CDs) is reported with a high photoluminescence quantum yield (PLQY) of 57.6% within 10 min at atmospheric pressure using a one-step pyrolysis method. The O-CDs exhibit a dual-emission property, with a blue emission peak at 425 nm and a strong orange emission peak at 590 nm. The dual-emission peaks of O-CDs can allow for fast orange/blue switching of fluorescence color with changes in the acid-base environment. O-CDs can serve as effective fluorescent probes for pH detection, depending on their fluorescence wavelength and intensity. Additionally, O-CDs have potential for fluorescence anti-counterfeiting. When exposed to NH 3 gas, O-CDs fluorescent ink rapidly (1 s) transitions from orange fluorescence to blue fluorescence, and then quickly (4 s) reverts back to orange fluorescence when the gas environment changes to HCl gas atmosphere. Thus, O-CDs fluorescent inks offer several advantages, including high fluorescence intensity, fast response, recyclability, and lossless encryption/decryption in “on-off-on” double encryption anti-counterfeiting.
研究领域:
材料科学
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化学
·
光学
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产品关联
DOI
高影响因子
JOURNAL OF FLUORESCENCE
·
2019
·Vol. 29
·期 6
·1423-1429
·
IF 1.913
Meng Xianjiao,Cao Duanlin,Hu Zhiyong,Li Zhichun,Han Xinghua,Ma Wenbing
In this study, a BODIPY-based water-soluble fluorescent chemosensor BBP has been synthesized using BODIPY as the fluorescence group and quinoline as the recognition group. BBP can be used for naked eye detection of pH in complete aqueous solution and it shows high specificity in a wide range of cations. The p Ka value is determined to be 2.94 and the fluorescence intensity is linearly related to pH in the range of 2.4–3.6.
研究领域:
分析化学
·
生物化学
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DOI
PubMed
高影响因子
CARBOHYDRATE RESEARCH
·
2022
·
IF 2.975
Jiangqin Lu,Shan Lu,Qinghua Cao,Juncheng Huang,Fei Liu,Haining Na,Jin Zhu,Zhen Jia
An easy and effective way to synthesize dual-functionalized cellulose derivatives with processability and fluorescence functionality by one-pot modification of successive esterification and carbonation under mild condition is established with the use of DMSO/DBU/CO 2 system. Accordingly, four kinds of dual-functionalized cellulose derivatives with rather good fluorescent response are obtained. After blending the synthesized dual-functionalized cellulose derivative with cellulose acetate as functional additive in solution, cast film with the elastic modulus , stress and strain reaches to 2.2 GPa, 34.1 MPa and 5.7% is prepared. Besides, the cast film also exhibits the ability to detect the pH value at 12–14 with detection accuracy of 0.4 through the change of fluorescent color. This research shows a simple but effective way to prepare dual-functionalized cellulose derivatives for the high-quality applications in field of detection.
研究领域:
材料科学
·
化学工程
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产品关联
DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2024
·
IF 4.3
Yulin Zhu,Mengqi Zhu,Qiuju Zhou,Qunwei Shu,Kejun Tan
Up/down-conversion dual-emission carbon dots (U/D-CDs) are rare and have potential in analytical sensing. Herein, a kind of novel U/D-CDs was prepared successfully by a one-step solvothermal method. The prepared U/D-CDs exhibited similar dual-emission behaviors at excitation wavelengths of 300 nm and 680 nm, respectively. In addition, U/D-CDs displayed good photostability and salt-resistance. Due to the protonation-deprotonation, U/D-CDs showed strong pH dependence in the pH range of 2.0–8.0, which developed an up/down-conversion dual-channel ratiometric fluorescence (FL) probe of pH. The FL intensity of U/D-CDs can be effectively quenched by Cu 2+ through the static quenching effect. Meanwhile, an obvious color change from yellow-green to blue can be observed under ultraviolet light with the increase of Cu 2+ concentration. The up/down-conversion dual-channel ratiometric fluorescence sensor can be used for the visual sensing of pH and Cu 2+ , which also eliminates background signals and improves its accuracy and selectivity in complex samples.
研究领域:
分析化学
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材料科学
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环境科学
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DOI
PubMed
高影响因子
RUSSIAN JOURNAL OF GENERAL CHEMISTRY
·
2024
·Vol. 94
·期 7
·1710-1719
·
IF 0.9
Han D.,Wang J.,Yang H.,Ran T.,Lu H.,Wang L.,Yan Z.
Abstract In the present study, carbon dots (CDs) were synthesized by solvothermal method using 1,4-diethynylbenzene as carbon source. The CDs exhibited the spherical particles as observed from transmission electron microscopy (TEM) image with the average particle size of 2.25±0.51 nm. The fluorescence quantum yield of the final CDs was 13% under excitation at 460 nm. The fluorescence intensity of CDs is diminished at both acidic and basic conditions, while a good linear relationship was realized at pH = 2–7 with the coefficient of determination ( R 2 ) of 0.9984 and the minimum detection limit (LOD) of 0.6 with good reversibility and cyclicity for pH detection. trans -resveratrol (t-res) was found to enhance the fluorescence of CDs well and the fluorescence intensity showed a good linear relationship to t-res within the concentration range of 10–100 μM with the coefficient of determination R 2 of 0.9993 and the LOD of 3 μM. The recoveries of the wines ranged from 100.36–102.40% with the relative standard deviations (RSD) of 2.56–3.48%. Thus, the CDs are extremely sensitive to t-res. Alkynyl ligand is used to prepare CDs, which illustrate the potential application for pH and t-res detection.
研究领域:
化学
·
分析化学
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产品关联
DOI
高影响因子
Analytical Methods
·
2018
·Vol. 11
·期 1
·36-43
·
IF 2.073
Shun-Hua Wu,Shu Wang,Wen-Le Fang,Xiao-Feng Guo,Hong Wang
In this study, we synthesized metal–organic frameworks (MOFs) UiO-67-bpydc using H2bpydc as ligands and Zr6 clusters as vertexes. Due to the protonation of the bipyridine group, UiO-67-bpydc shows pH-dependent fluorescence (365 nm/530 nm) in the pH range from 1 to 9, which shows its feasibility as a wide-range pH sensor. Further study indicated that UiO-67-bpydc exhibits stability, reusability, selectivity and has an excellent linear relationship in the pH range 4.0–6.5, and the mechanism of the UiO-67-bpydc fluorescence intensity with the variation of pH has been studied in detail. This MOF-based fluorescent sensor has been applied to specifically detect the pH of solutions in the presence of the body fluid matrix. Compared with reported pH-MOF sensors, UiO-67-bpydc can be practically applied in real samples and is easily prepared with excellent stability in different buffer solutions.
研究领域:
材料科学
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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
Mengting Xie,Jiecheng Zhao,Xufeng Mai,Yan Chen,Wei Zhao,Ming Sun,Lin Yu,Hui-Juan Yu
A new ruthenium complex-based luminescent probe Ru-impa for Cu 2+ and pH detection has been synthesized and characterized. Ru-impa could rapidly and selectively detect Cu 2+ in aqueous solutions and the working pH ranges from weakly acidic to alkaline. The detection limit calculated using the S/N and S/B ratio was 24.7 nM and 3.4 μM, respectively. The test strips for practical detecting application were also prepared and the actual detection limit in drinking water was found to be 3 μM, which is lower than the WHO-guided drinking water limit (30 µM) and the upper limit of human serum free copper content (1.7–3.9 μM). Luminescence imaging study showed that Ru-impa could monitor Cu 2+ level fluctuation in the cells. In addition, Ru-impa also shows a sensitive on-off luminescence response when pH > 10, indicating that it can also be used as a pH sensor under extremely alkaline conditions.
研究领域:
分析化学
·
生物化学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2019
·
IF 2.931
Kangming Xiong,Caixia Yin,Yongkang Yue,Fangjun Huo
The intracellular pH has a significant effect on several essential biological processes such as material transfer, enzymatic action, cell apoptosis et al. Thus, it is necessary to monitor pH fluctuation in living cells. Here, we designed a near-infrared ratiometric fluorescence probe for pH detection. The spectroscopic responses of probe to pH variations were investigated in CH 3 OH/PBS (v/v, 1:1) mixed solution at different pH values. The experimental results showed that the probe is sensitive to acidity, and the p K a of probe is calculated to be 4.85. When the pH was decreased from 9.0 to 1.0, the color of probe solution change from purple to yellow was found by naked eye. Moreover, the probe can be a practical tool for assessing cellular pH by cell imaging.
研究领域:
生物化学
·
细胞生物学
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产品关联
DOI
PubMed
高影响因子
Biosensors-Basel
·
2021
·Vol. 11
·期 9
·304
·
IF 5.519
Wangyang Zhang,Xiaoqiang Zhao,Lina Diao,Hao Li,Zhonghao Tong,Zhiqi Gu,Bin Miao,Zhan Xu,Han Zhang,Yue Wu,Jiadong Li
In this study, we developed a low-cost, reusable, and highly sensitive analytical platform for the detection of the human metabolite uric acid (UA). This novel analysis platform combines the graphene chemoresistor detection technique with a magnetic bead (MB) system. The heterojunction (single-layer graphene and HfO2thin-film material) of our graphene-based biosensor worked as a transducer to detect the pH change caused by the specific catalytic reaction between UA and uricase, and hence acquires a UA concentration. Immobilization of uricase on MBs can decouple the functionalization steps from the sensor surface, which allows the sensor to be reusable. Our microsensor platform exhibits a relatively lower detection limit (1 μM), high sensitivity (5.6 mV/decade), a linear range (from 1 μM to 1000 μM), and excellent linearity (R2= 0.9945). In addition, interference assay and repeatability tests were conducted, and the result suggests that our method is highly stable and not affected by common interfering substances (glucose and urea). The integration of this high-performance and compact biosensor device can create a point-of-care diagnosis system with reduced cost, test time, and reagent volume.Keywords:graphene;pH detection;uric acid detection;magnetic beads;chemoresistor
研究领域:
生物传感器技术
·
医学诊断
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材料科学
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产品关联
DOI
PubMed
高影响因子
Materials Today Chemistry
·
2022
·
IF 7.613
Tian Xia,Zhuangzhuang Wu,Ying Liang,Wenxin Wang,Yongpeng Li,Zhuyin Sui,Linlin Shan,Chaokun Li,Ruimei Fan,Qi Chen
The design and fabrication of versatile covalent organic frameworks (COFs) with multiple properties for diverse applications is highly desirable. Here, the difunctional COFs material g–C 18 N 3 –COF was prepared and modified to be applied for efficient photocatalytic degradation of Rhodamine B (RhB) and pH detection, respectively. Owing to the triazine unit which was suitable for photocatalyst construction, g–C 18 N 3 –COF was sensitive to visible light and exhibited excellent photocatalysis capability toward RhB. Specially, the photocatalytic degradation of RhB with a high concentration of 300 ppm using g–C 18 N 3 –COF reached equilibrium within 6 h. Moreover, g–C 18 N 3 –COF was further grown in-situ onto the filter paper to generate a novel composite material g–C 18 N 3 –COF@Paper with bright yellow fluorescence. g–C 18 N 3 –COF@Paper could visualize the pH detection by remarkable changes in its fluorescent intensity and color in the range of pH value from 1 to 5, on account of the protonation of the nitrogen atoms from the triazine ring in g–C 18 N 3 –COF. The triazine-based sp 2 carbon-conjugated g–C 18 N 3 –COF, respectively, used as photocatalyst and sensor in this work offers a new strategy to construct the versatile COFs material, facilitating the application of functional COFs in the environmental protection field.
研究领域:
材料科学
·
环境科学
·
化学工程
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产品关联
DOI
高影响因子
NANOTECHNOLOGY
·
2023
·Vol. 34
·期 12
·125501
·
IF 3.5
Shenna Chen,Yunping Hao,Ronghui Li,Yanxu Liu,Jinxia Li,Lina Geng
Recently, carbon dots (CDs) have exhibited promising applications in the fluorescence detection of various ions and biomolecules. In this work, one kind of nitrogen-doped CDs (N-CDs) with high fluorescence intensity was synthesized, characterized by transmission electron microscopy, x-ray diffraction, x-ray photoelectron spectroscopy, Fourier-transform infrared, UV–vis absorption spectra, and fluorescence spectra. The results show that the spherical and uniform N-CDs (quantum yield: 60.2%) have remarkable fluorescence properties and photostability, which makes N-CDs can be utilized as an 'on-off-on' sensor for Hg2+ and glutathione (GSH). In addition, the pH-sensitive behavior of N-CDs makes it also applicable to H+ detection under acid conditions (pKa = 3.53). The linear range of the 'turn-off' sensor detecting Hg2+ was 0.014–50 μM, with a 0.014 μM limit of detection (LOD). GSH was detected by the fluorescence 'turn-on' method with a linear range of 0.125–60 μM and a LOD of 0.125 μM. The outstanding performance of N-CDs makes it potential applications in ecological pollution and biomolecule visualization monitoring.
研究领域:
分析化学
·
环境科学
·
生物医学
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产品关联
DOI
PubMed
高影响因子
ANALYTICA CHIMICA ACTA
·
2021
·
IF 6.558
Yanqi Li,Yu Wang,Shuqin Chen,Zhenming Wang,Liang Feng
In this work, a novel paper-based colorimetric sensor array was developed by inkjet printing method with polyethylene glycol (PEG) immobilization system. Eight commercially available pH indicators with sequential pH segments in nearly whole pH range were dissolved in nine mixed inks to fabricate the 3 × 3 sensor array on mixed cellulose ester (MCE) paper. Based on homogeneous deposition of inkjet printing, the eight pH indicators were sufficiently immobilized on MCE paper with the assistance of PEG-400, which guaranteed pH detection of aqueous samples on sensor array without hydrophobic barriers. Besides, the indicating range of each indicator obtained an extension through the addition of PEG 400, which remarkably enriched the distinguishable capability of sensor array and benefited for high resolution of pH detection. As such, the as-fabricated paper-based sensor array exhibited an excellent discrimination ability in pH range of 1.00–13.60 with a high resolution of 0.20 pH unit, not only for standard pH buffer solutions but for real aqueous samples.
研究领域:
分析化学
·
生物医学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）