MATERIALS LETTERS
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2020
·
IF 3.204
Shengrui Zhang,Qin Wang,Zhifeng Liu,Jin Liu,Jiufu Lu
A colorimetric turn-on probe was developed for the selective naked-eye determination of thiophenols by using yellow-emissive carbon dots (Y-CDs) as the colorimetric reporter and 2, 4-dinitrobenzenesulfonamide (DNBS) group as the recognition unit. The surfaces of Y-CDs were covalently coated with 2, 4-dinitrobenzenesulfonyl chloride to afford the 2, 4-dinitrobenzene- functionalized carbon dots ( CD-DNBS ) as a novel probe for detecting thiophenols. CD-DNBS was nearly colorless. Upon addition of thiophenol , the DNBS moiety of CD-DNBS could be readily cleaved via nucleophilic substitution reactions, leading to a dramatic increase in absorbance at 400 nm. The established detection probe displays a high selectivity towards thiophenol over biothiols and other biologically related species.
研究领域:
分析化学
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生物化学
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DOI
高影响因子
Canadian Journal of Chemistry
·
2018
·Vol. 96
·期 12
·
IF 1.084
Guanhong Liu,Peipei Ren,Fan Yang,Xuekai Dou,Jun Wang,Youtao Song
Two novel isomeric colorimetric probes are established for simultaneous determination of copper ions using 2-hydroxy-5-methoxybenzaldehyde fluorescein hydrazone (5-HMBA-FH) and 2-hydroxy-3-methoxybenzaldehyde fluorescein hydrazone (3-HMBA-FH). They are synthesized by reacting fluorescein hydrazide with 2-hydroxy-5-methoxybenzaldehyde and 2-hydroxy-3-methoxybenzaldehyde, respectively, and then characterized by 1H-NMR, 13C-NMR, and infrared spectrum. The addition of copper ions to the solutions of two novel colorimetric probes can generate the obviously peaks at 498 nm in UV–vis absorption spectra along with a rapid colour change from colourless to dark yellow. The detection limits of the method for Cu2+ ion were 3.442 × 10−6 mol/L and 3.682 × 10−6 mol/L separately for 5-HMBA-FH and 3-HMBA-FH, respectively. The additions of other metal ions hardly affect the determination of copper ions. The proposed method was successfully applied to the analysis of Cu2+ ions in various samples. This method possesses high sensitivity, high simplicity, and minimized interference and will provide a great advantage in detecting copper ions in the environment, food, and medical applications.
研究领域:
分析化学
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环境科学
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医学
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DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2020
·
IF 3.306
Muhammad Amir Masood,Yuncong Chen,Shankun Yao,Shumeng Li,Weijiang He,Zijian Guo
A new BODIPY based Pd (II) complex, Pd-BDPA has been developed as a dual fluorometric and colorimetric probe for the detection of sulfide anion. The sensing ability is based on the interaction affinity of the Pd (II) towards the sulfide anion which is highly selective and immediate with a detection limit of 240 nM. The interaction between Pd (II) and sulfide is not only highly selective over the other common anions but also not interfered by their coexisting. This selective interaction between them leads to the regeneration of free ligand resulting in the dramatic changes in both fluorescence and absorption spectra. The fluorescent changes lead to quenching the emission spectra which is linear with the concentration of sulfide in the range of 1-10 μM. In addition to fluorescence quenching, the interaction also resulted in the significant color switching from purple to blue which was easily distinguished by the naked eye. Another important advantage is that the Pd-BDPA coated paper-based strips show the sulfide selectivity and sensitivity by the color changes as is in the solution form, revealing its practical utility more conveniently. In addition, the Pd-BDPA probe can also successfully be utilized for the determination of sulfide in real water samples with satisfactory recovery results indicating its feasibility for environmental samples.
研究领域:
分析化学
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环境科学
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生物化学
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DOI
高影响因子
ANALYST
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2011
·Vol. 136
·期 19
·3904-3910
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IF 3.913
Jing-Min Liu,He-Fang Wang,Xiu-Ping Yan
A gold nanorod (AuNR) based colorimetric probe was reported for the rapid and selective detection of Cu2+ ions. The probe was fabricated by functionalizing cysteine (Cys) onto AuNR (Cys-AuNR) with an aspect ratio of 2.3. The strong coordination of Cu2+ with cysteine resulted in a stable Cys–Cu–Cys complex, and induced the aggregation of the colloidal nanorods along with a rapid colour change from blue-green to dark gray. Potential factors affecting the performance of the probe for the detection of Cu2+ were carefully optimized, including the pH value of the buffer media, the concentration of cysteine, and the kinetics for the coordination of Cu2+ with Cys-AuNR. Under optimal conditions, the developed colorimetric method gave a linear range of 1–100 μM for Cu2+, and a detection limit (3s) of 0.34 μM. Moreover, the developed method exhibited excellent selectivity for Cu2+, and quantitative spike-recoveries from 90% to 107% in environmental water samples. The proposed colorimetric approach can in principle be used to detect other metal ions by functionalizing various specific ligands onto the AuNR that can selectively bind the other target metal ions.
研究领域:
分析化学
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纳米生物学
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环境科学
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DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2014
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IF 2.129
Jiangang Zhang,Li Zhang,Yanli Wei,Jianbing Chao,Shaomin Shuang,Zongwei Cai,Chuan Dong
A novel rhodamine derivative 3-bromo-5-methylsalicylaldehyde rhodamine B hydrazone (BMSRH) has been synthesized by reacting rhodamine B hydrazide with 3-bromo-5-methylsalicylaldehyde and developed as a new colorimetric probe for the selective and sensitive detection of Cu 2+ . Addition of Cu 2+ to the solution of BMSRH results in a rapid color change from colorless to red together with an obvious new band appeared at 552 nm in the UV–vis absorption spectra. This change is attributed to the spirocycle form of BMSRH opened via coordination with Cu 2+ in a 1:1 stoichiometry and their association constant is determined as 3.2 × 10 4 L mol −1 . Experimental results indicate that the BMSRH can provide a rapid, selective and sensitive response to Cu 2+ with a linear dynamic range 0.667–240 μmol/L. Common interferent ions do not show any interference on the Cu 2+ determination. It is anticipated that BMSRH can be a good candidate probe and has potential application for Cu 2+ determination. The proposed probe exhibits the following advantages: a quick, simple and facile synthesis.
研究领域:
分析化学
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生物化学
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产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2017
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IF 2.714
Shuang Li,Te Wei,Guojuan Ren,Fang Chai,Hongbo Wu,Fengyu Qu
A simple and highly practical colorimetric method has been proposed for detection of chromium ions (Cr 3+ and Cr 6+ ) synchronously by sodium hyaluronate functionalized gold nanoparticles (SH-AuNPs). The SH-AuNPs were synthesized and characterized by UV–vis spectra and transmission electron microscopy (TEM). The colorimetric response of Cr 3+ and Cr 6+ can be performed simultaneously by the same probe SH-AuNPs, based on the property of special localized surface plasmon resonance (LSPR). The interaction between chromium ions and sodium hyaluronate causes rapid aggregation of the SH–AuNPs conjugates and a concurrent color conversion from wine red to blue gray which is clearly detectable by the naked eye. By using SH-AuNPs as colorimetric probe, the color change with 3 μM Cr 3+ , 1 μM Cr 6+ , or 10 μM mixed chromium ions can be recognized easily by naked eye with highly selectivity. The detection limit calculated by the linear relationship of LSPR were at 0.78 nM (for Cr 3+ ), 2.90 nM (Cr 6+ ) and 0.69 nM (mixed chromium ions) respectively, which were all below the guideline value set by World Health Organization (0.962 μM). The practical applicability of the SH-AuNPs was also verified by the detection of chromium ions in natural lake water samples.
研究领域:
分析化学
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环境科学
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纳米技术
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产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
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2018
·
IF 2.732
YaoYao Qu,Guojuan Ren,Liying Yu,Baoya Zhu,Fang Chai,Lihua Chen
Herein, the fluorescent carbon dots (CDs) has been synthesized by hydrothermal method by using ethylene diamine tetraacetic acid (EDTA) as a raw materials. The prepared CDs exhibited bright blue fluorscence excited by 340 nm with the quantum yield as high as 52%. The CDs possess special fluorescence responses to 2-nitrophenol (2-NP) and 4-nitrophenol (4-NP), and the slump of fluorescence was demonstrated by CDs solution in the case of 2-nitrophenol and 4-nitrophenol existence. The detection limit of 2-NP and 4-NP was calculated at 77 nM and 60 nM, respectively. Meanwhile, the color response to 2-NP and 4-NP can be observed from achromatic solution to yellow by naked eye. All in all, the obtained CDs can be applied as fluorescence and colorimetric probe in environmental protection.
研究领域:
环境科学
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分析化学
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产品关联
DOI
高影响因子
HELVETICA CHIMICA ACTA
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2022
·Vol. 105
·期 7
·e202200037
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IF 2.201
Xueyan Ma,Lixia Liu,Jia Wang,Yongbing Hao,Xiufang Xu,Xuefang Shang
Two colorimetric and fluorescent probes based on ferrocene derivatives have been designed and synthesized. Among studied anions (F − , AcO − , H 2 PO 4 − , Cl − , Br − and I − ), probe 1 with p -nitrophenyl hydrazine structure has the strongest binding ability for F − , as well as probe 2 for H 2 PO 4 − . It had strong binding ability and was not affected by other anions. The determination limit of 1 toward F − was 5.0×10 −6 mol⋅L −1 which can be used for the trace detection of F − . The interacted process of host–guest accompanied by colorimetric changes and increment in fluorescent intensity of the probes. A 1 H-NMR titration experiment and theoretical investigation indicated that −NH in hydrazine participated in the interaction, and the hydrogen-bonding formed between the probes and anions. These results provided an essential clue to the developing the colorimetric probe based on hydrazine participation.
研究领域:
分析化学
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材料科学
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产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2024
·
IF 4.3
Miao Zhang,Xiaoyu Shi,Guiping Zhang,Chunli Xu,Baoxin Li
Recognizing and quantifying enantiomers of chiral molecule is of great importance in chemical, biological and pharmaceutical fields. Herein, we presented one simple-yet-efficient method of sensing tyrosine (Tyr) enantiomers. In this sensing, silver triangular nanoplates (AgTNPs) were used as colorimetric probes. L-Tyr quickly induced the color of AgTNPs solution to change from dark blue to light gray, whereas D-Tyr induced no change of the AgTNPs solution color. The obvious color change enables the naked eye to recognize Tyr enantiomer. The visual method was used to detect the enantiometric excess value of L-Tyr in the whole range (−100 % ∼ 100 %). This chiral sensing can be finished within 5 min using one simple ultraviolet–visible spectrometer or naked eye. Furthermore, the mechanism of this chiral sensing was explored. It was confirmed that this chiral sensing was based on AgTNPs’ intrinsic chirality. This chiral sensing is rapid, simple, and low-cost, and has great potential for chiral determination of Tyr.
研究领域:
化学
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生物学
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药学
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产品关联
DOI
PubMed
高影响因子
ANALYTICAL CHEMISTRY
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2016
·
IF 5.886
Yue Zhang,Hui-Yan Shen,Xin Hai,Xu-Wei Chen,Jian-Hua Wang
The rapid and accurate detection of hydrogen sulfide is of great concern due to its unique role on environmental pollution and signal transmission in physiological systems. Herein, we report a smart colorimetric probe for the selective detection of H2S. The probe is prepared via a surfactant-free route with cross-linked polyhedral oligomeric silsesquioxane (POSS) polymer cage as capping ligand and reducing agent under microwave irradiation, called poly-POSS-formaldehyde polymer (PPF) cage-AgNPs or PPF-AgNPs for short. The caged silver nanoparticles are well-dispersed with narrow size distribution within 6.0–8.4 nm. Chloride ions and aldehyde groups in PPF make the nucleation and growth of Ag nanoparticles accomplished within a very short time of 1 min. The positively charged PPF-AgNPs exhibit excellent selectivity to H2S against other anionic species and thiols due to the specific Ag–H2S interaction, where the favorable protection effect of PPF polymer cage from the nanoparticle aggregation is demonstrated. The colorimetric probe presents a quick response to H2S (<3 min) and favorable sensitivity within a linear range of 0.7–10 μM along with a detection limit of 0.2 μM. The probe is well demonstrated by analysis of H2S in various water and biological samples.
研究领域:
环境科学
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生物化学
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材料科学
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产品关联
DOI
PubMed
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
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2019
·Vol. 411
·期 12
·2645-2652
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IF 3.286
Li Dongxian,Wang Shun,Wang Ling,Zhang Hao,Hu Jiandong
In this study, a simple colorimetric probe was developed for rapid and highly sensitive detection of malathion based on gold nanoparticles (AuNPs) anti-aggregation mechanism. A certain amount of NaOH can cause the aggregation of citrate-stabilized AuNPs due to the electrostatic interactions, and the color of AuNP solution changes from wine-red to gray. While in the presence of malathion, malathion is easily hydrolyzed in a strong alkali environment (pH > 9), followed by the production of a mass of negative charges, and thus the aggregated AuNPs turns to well-dispersed and the color of AuNP solution changes from gray to wine-red. This characteristic change can be visualized with the naked eye and quantitatively detected by an ultraviolet-visible (UV-Vis) spectrometer. Under optimized conditions, this probe exhibited a linear response to malathion in the concentration range of 0.05–0.8 μM with a limit of detection (LOD) down to 11.8 nM. The probe also showed good specificity for malathion detection in the presence of other interfering pesticide residues. Furthermore, the probe was successfully employed to detect malathion in environmental samples, with a recovery of 94–107% and a relative standard deviation (RSD) less than 8%. The results demonstrated that the proposed colorimetric probe based on anti-aggregation of AuNPs could be used for quantitative analysis of malathion and provided great potential for malathion determination in environmental samples.
研究领域:
分析化学
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环境科学
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农业科学
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产品关联
DOI
PubMed
高影响因子
Analytical Methods
·
2015
·Vol. 7
·期 22
·9604-9608
·
IF 1.821
Yanhua Yu,Changzhi Dong
In this paper, an efficient colorimetric and fluorescent probe based on a benzothiadiazole derivative was developed for the detection of fluoride ions (F−). The selectivity of this approach capitalized on the highly selective and straightforward chemical reaction between F− and the Si–O bond. The sensing behavior of this probe towards anions was monitored by UV-visible and fluorescence spectroscopies in acetonitrile–aqueous buffer mixtures. Among the tested anions: F−, Cl−, Br−, I−, ClO4−, NO3−, CN−, HSO4−, AcO− and H2PO4− only F− induced a remarkable red-shift (149 nm) in the absorption spectrum which is concomitant with a color change from colorless to pink. This probe provides a new approach for naked-eyed detection of F− and the detection limit was calculated to be 1.7 μM. Besides, a concomitant fluorescence decrease was also observed. These results demonstrated that the probe could detect F− with excellent sensitivity and selectivity in complicated samples.
研究领域:
分析化学
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环境科学
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产品关联
DOI
高影响因子
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