OPTIK
·
2021
·
IF 2.443
Hong Wang,Yuehan Wu,Yuzhe Zhang,Man Zhou,Song Xu,Zhongyu Li
A novel colorimetric and fluorescent probe, 2,5-bis[3-ethyl-2-methylbenzothiazole]-croconine ( BBC ) has been synthesized and characterized. The BBC dye can effectively recognize Ag + in the presence of potentially competitive metal ions (Co 2+ , Na + , Cd 2+ , K + , Mg 2+ , Zn 2+ , Ca 2+ , Ba 2+ , Ni 2+ , Cr 3+ , Al 3+ ), which exhibited visible color change and fluorescence spectra behaviors. The Benesi-Hildebrand plot accurately showed the binding constant of BBC- Ag + . Correspondingly, the 1:1 stoichiometric structure of BBC and Ag + was evaluated by using Job’s plot. Moreover, the complex mechanism of BBC toward Ag + were also investigated by Fourier transform infrared (FT-IR) and 1 H nuclear magnetic resonance ( 1 H NMR). The results indicated that BBC could be used as a high effective colorimetric and fluorescent sensor to identify Ag + .
研究领域:
分析化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2015
·
IF 4.097
Xiaofeng Yang,Lijun Xie,Rui Ning,Xiaoqian Gong,Zheng Liu,Yexin Li,Luyi Zheng,Gege Zhang,Bin Gao,Yu Cui,Guoxin Sun,Guangyou Zhang
A new colorimetric and on–off fluorescence sensor based on diketopyrrolopyrrole (DPP) was synthesized for detection of fluoride anion. The sensor displayed a rapid responsivity and high selectivity and sensitivity toward F − over other anions, with a significant 267 nm bathochromic shift of the absorption maximum, and the new peak was located in the near-infrared region. Meanwhile, it could be easily observed that the sensor for F − ion changed from red to dark green by the naked eye, and from fluorescence red to non-fluorescence dark under UV lamp immediately after the F − ion was added. The experimental results revealed that the formation of anionic species from deprotonation of the hydrazone N–H moiety by fluoride ion was responsible for the spectral changes. Density function theory calculations were conducted to rationalize the optical response of the sensor. To the best of our knowledge, it was the first sensor for fluoride ever reported with a 267 nm red shift response, which could give a colorimetric and on–off fluorescence response instantly.
研究领域:
化学传感器
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2024
·Vol. 192
·期 1
·1-12
·
IF 5.3
Liu Xiang,Li Huijun,Sun Junjun,Shi Jianchao,Xu Zhouqing,Wang Yan
A HPU-23@Ru@Tb-NH 2 sensor array with light-driven oxidase-mimicking activity and triple-emission fluorescence was developed. It was composed of a Tb 3+ -functionalized metal organic framework and Ru(bpy) 3 2+ and applied to the simultaneous detection of Hg 2+ , ClO − , and PO 4 3− via differently responsive channels. HPU-23@Ru@Tb-NH 2 had a photoresponsive colorimetric response toward Hg 2+ with a LOD as low as 4.18 nM. In addition, the three emissions of the HPU-23@Ru@Tb-NH 2 sensor array were influenced by ClO − and PO 4 3− to varying degrees, causing remarkably distinguishable responses for the fluorescence channels to discriminate ClO − and PO 4 3− from each other. The detection limits of ClO − and PO 4 3− were 12.26 µM and 0.197 nM, respectively. Therefore, this work demonstrates the feasibility of multi-emission and multi-mode sensing platform, which is able to combine the advantages of different strategies for solving the problems of various toxic substances coexisting in the environment while meeting the needs of accurate and precise results and no side interferences. Graphical
研究领域:
分析化学
·
环境科学
·
生物医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2022
·
IF 4.831
Qi Liu,Yatong Liu,Zhiyong Xing,Yuntong Huang,Li Ling,Xinglin Mo
In this study, a novel dual-function probe BMP based on benzothiazole was easily synthesized and characterized through common optical technique. In the system consisting of DMF/H 2 O (v/v, 2/3), probe BMP showed azure and blue-green to Al 3+ and Ga 3+ , respectively. Besides, the binding ratios of BMP to Al 3+ and Ga 3+ were determined as 1:1, which confirmed by Job’s plot. Furthermore, for Al 3+ and Ga 3+ , the limit of detection (LOD) was determined to be 1.51 × 10 -6 M and 4.28 × 10 -6 M, respectively. Moreover, it was worth noting that BMP showed good performances in paper colorimetry, cell phone colorimetric identification and cell imaging.
研究领域:
分析化学
·
材料科学
·
生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYTICAL CHEMISTRY
·
2025
·
IF 6.7
Jingyuan Guo,Guo Wang,Yunfan She,Kai Li,Yujia Liu,Zhiyi Sun,Zhengbo Chen
Single-atom nanozymes have made important progress in the field of sensors, but their catalytic performance as natural enzyme substitutes is far from satisfactory. We describe here a FeFe dual single-atom nanozyme (Fe2N6/CN) with a Fe loading of 0.89 wt %, and it shows a synergistic effect and a peroxidase (POD)-like activity. Especially, the Fe2N6/CN nanozyme shows an excellent specific activity (315.4 U μmol–1). The values of catalytic rate constant (kcat) and catalytic efficiency (kcat/Km) for the Fe2N6/CN with 3,3′,5,5′-tetramethylbenzidine (TMB) are 23.8 s–1 and 8.24 × 104 M–1 s–1, respectively, and with H2O2, they are 30.8 s–1 and 0.919 × 103 M–1 s–1, respectively. Density functional theory calculations reveal that Fe2N6/CN possesses excellent POD-like activity. Based on the POD-like activity of Fe2N6/CN, we design a Fe2N6/CN nanozyme chemical tongue for the colorimetric recognition of aromatic amines using three wavelengths as array’s channels. The data interpretation using linear discriminant analysis, clustering heat map, etc., shows excellent clustering separation and classification of aromatic amines. Furthermore, this chemical tongue can simultaneously recognize mixtures of different molar ratios, quantitatively determine different concentrations of individual aromatic amines, and even identify unknown samples. This preparation strategy not only provides a promising pathway for the utilization of nanozymes but also highlights the potential of dual single atoms as an attractive platform for design of sensor arrays.
研究领域:
纳米酶
·
催化
·
传感器
·
化学传感
·
材料科学
·
分析化学
·
计算化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2020
·
IF 7.1
Hao-Hua Deng,Kai-Yuan Huang,Quan-Hui Fang,Ya-Ping Lv,Shao-Bin He,Hua-Ping Peng,Xing-Hua Xia,Wei Chen
The design and development of colorimetric sensors for recognition of rare-earth Sc 3+ ions are very challenging and most of the reported methods are limited by poor sensitivity and serious interference. Herein, we unveiled a new colorimetric strategy for the sensitive and selective detection of Sc 3+ based on the surface plasmon resonance properties of gold nanoparticles (GNPs). The key aspect of the proposed protocol is the selection of pyridoxal phosphate (PLP), an important biomolecule involved in many biological processes, both as an effective aggregation promoter of GNPs stabilized by cysteamine (Cyst-GNPs) and a strong chelator for the selective complexation of Sc 3+ . PLP can covalently bind to the Cyst-GNPs through the formation of a Schiff base, which neutralizes the positive surface charges, weakens the electrostatic repulsion force among the nanoparticles, thereby triggering the agglomeration of Cyst-GNPs. Owing to the intensive Lewis acid-base interactions, the introduced Sc 3+ ions effectively compete with Cyst-GNPs to bind PLP, and the Cyst-GNPs tend to be dispersed in this case. A linear response from 0.1 to 3 μM is achieved for Sc 3+ , and a detection limit down to 0.02 μM is obtained. Negligible interfere from other ions is observed in this assay under identical experimental conditions.
研究领域:
分析化学
·
纳米技术
·
材料科学
✓ 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）