SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2024
·
IF 4.3
Mingyi Guan,Hui Li,Man Tu,Chenchen Fu,Xiyu Yang,Feng Wang
Trivalent chromium (Cr 3+ ) causes serious environmental pollution, degradation of the quality of edible agricultural products and human diseases. A novel phenanthro[9,10-d]imidazole-derived conjugated polymers (PIPF) was obtained from 4-(5,10-dibromo-1H-phenanthro[9,10-d]imidazol-2-yl)phenol and diethyl 4,4′-(2,7-bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-9H-fluorene-9,9-diyl)dibutyrate by Suzuki polymerization reaction, which was reasonably demonstrated by 1 H NMR spectroscopy, infrared spectroscopy and quantum chemical calculations. The PIPF exhibits a “turn-on” fluorescence response to Cr 3+ in DMSO/H 2 O (98:2, v/v) with naked-eye detection. The limit of detection for Cr 3+ was calculated to be 0.073 μM with a linear range of 3–9 μM. The possible mechanism of the PIPF-based Cr 3+ fluorescence “turn-on” sensor is due to the inhibition of the PET process by the coordination of Cr 3+ to the hexaalkyl ester carbon chain of PIPF (RCOO-). The high sensitivity, good selectivity, and utility of this sensor indicated that PIPF-based “turn-on” fluorescence sensor is a potential fluorescence application for measuring Cr 3+ in environmental samples.
研究领域:
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Xiao Liang,Qiu-Lan Li,Wen-Bo Zhao,De-Zhi Yang,Ya-Ling Yang,Zi-Tao Zhong
Given the potential risks posed by the toxic heavy metal ion Cr 3+ to environmental and human health, the development of fast, simple, and visible detection methods for Cr 3+ is critical to control its detrimental effects. This study presents a sensitive and selective colorimetric method for Cr 3+ analysis, leveraging the laccase-like activity of Co,Zn@Cu-MOF(V B3 ), which was synthesized via a microwave digestion approach. The usage and proportion of precursors (vitamin B3 and CuCl 2 ) were examined to obtain the material exhibiting the optimal catalytic activity and response to Cr 3+ . The well-designed Co,Zn@Cu-MOF(V B3 ) exhibited remarkable laccase-like activity at pH of 5.8, and can oxidize the colorless substrate (2,4-dichlorophenol) to red product with 4-aminoantipyrine as the chromogenic agent. The findings indicate that Cr 3+ induces a decrease in absorbance at 505 nm. Under optimal conditions, the absorbance was linearly proportional to the Cr 3+ concentration in the range of 0.68–679.25 ng/mL, achieving a detection limit of 0.124 ng/mL. The method also displays robust anti-interference performance against other metal ions, and was successfully applied in the determination of Cr 3+ in water samples, yielding recoveries ranging from 90.2 % to 108.8 %.
研究领域:
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
DYES AND PIGMENTS
·
2020
·
IF 4.613
He Li,Donglin Li,Bowen Qin,Wenliang Li,Haoyan Zheng,Xiaoying Zhang,Jingping Zhang
An extremely stable pillar-layered metal-organic framework (MOF), [Cd 4 (NDC) 3 (4-Hptz) 2 (H 2 O) 2 ]·H 2 O (1), has been successfully designed and synthesized (4-Hptz = 5-(4-pyridyl)-tetrazolate, NDC = 1,4-Naphthalenedicarboxylic acid). Compound 1 can detect Cr 3+ in water by fluorescence enhancement, which is the first known case of MOF. This is of great significance for our study on new fluorescent probes .
研究领域:
材料科学
·
环境科学
·
分析化学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2016
·
IF 4.758
Yaming Yu,Ying Hong,Yanqi Wang,Xiangying Sun,Bin Liu
In this paper, for the first time, we used mecaptosuccinic acid (MSA) modified gold nanoparticles to detect Cr 3+ selectively. The procession is indicated by a red shift of the UV–vis absorption and a dramatic color change from red to blue. Under optimized conditions, this technique exhibits high selectivity to Cr 3+ over other tested heavy metal ions . The ratio between the absorbance wavelength at 650 nm and 520 nm (A 650 /A 520 ) is linearly proportional to the concentration of Cr 3+ in the range from 0.6 to 1.4 μM. The detection limit is estimated as low as 0.04 μM by UV–vis spectroscopy and 0.6 μM by naked eyes, respectively, making naked eye-detection of Cr 3+ feasible. This result is below the maximum accepted levels of chromium in drinking water (0.962 μM) by the World Health Organization. This simple approach is tried to detect trace Cr 3+ in real water samples and shows recoveries of 93–107%. The overall sensing assay is simple, cheap (by the use of MSA) and fast (the detection time is 10 mins). Therefore, it has the potential application to be the on-site, real-time and low-cost Cr 3+ sensor.
研究领域:
分析化学
·
环境科学
✓ 已验证
DOI
高影响因子
MOLECULES
·
2025
·Vol. 30
·期 18
·3668
·
IF 4.6
Min Ye,Lifen Meng
This study used Houttuynia cordata as the precursor to prepare high fluorescence quantum yield carbon quantum dots (Hc-CQDs) by a simple hydrothermal method. The surface of the Hc-CQDs contained abundant functional groups, such as carboxyl, hydroxyl, and amino groups, which indicated the Hc-CQDs had good water solubility. On the basis of the excellent fluorescence characteristics of Hc-CQDs, a sensor was constructed to achieve high selectivity detection of Cr3+, and the detection limit of the Hc-CQDs was 49 μg/L. The sensor also exhibited strong anti-interference ability and excellent reproducibility, which was used for the determination of Cr3+in environmental water samples, and its spiked recovery rate reached over 90%. Therefore, the Hc-CQDs had potential application in the analysis.
研究领域:
纳米材料
·
分析化学
·
环境科学
·
荧光传感器
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2019
·
IF 6.393
Wang Li,Zihao Chen,Jiali Ren,Tao Yang,Qinlu Lin,Juewen Liu
Using simple and commonly available devices for signal reading has attracted much attention recently for DNA-based sensors. Most previous works focused on electrochemical or colorimetric signals. In this work, a portable device was structured by simple electronic and 3D-printed components to convert fluorescence signal to electric resistance with reading by a multimeter. To demonstrate its application, we took advantage of the slow ligand bind kinetics of Cr 3+ to promote DNA adsorption on metal oxide nanoparticles (MONPs). Nanoceria (CeO 2 ), screened from a total of 13 kinds of MONPs, possesses high specificity for Cr 3+ from other metal ions. EDTA can mask other metal ions, while it cannot bind Cr 3+ quickly so that Cr 3+ promotes DNA adsorption and thus fluorescence quenching. The linear range is from 0 to 2 μM Cr 3+ with a LOD of 0.02 μM. Using common electronic components and the 3D-printed miniaturized device, the sensor to transfer fluorescence to electric resistant signal was also measured by a digital multimeter. In this case, the LOD is about 1 μM Cr 3+ . Such a strategy may provide a simple and general approach for fluorescent portable device fabrication and may find applications for other onsite sensing applications.
研究领域:
分析化学
·
环境科学
·
材料科学
·
传感器技术
✓ 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）