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Hafez NS, Amer WA, Okba EA, Sakr MAS, Alganzory HH, Ebeid EZM. Novel ultra-sensitive and highly selective cyanine sensors based on solvent-free microwave synthesis for the detection of trace hypochlorite ions in drinking water. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 303:123116. [PMID: 37459665 DOI: 10.1016/j.saa.2023.123116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Revised: 06/18/2023] [Accepted: 07/06/2023] [Indexed: 09/20/2023]
Abstract
The adoption of chlorine in drinking water disinfection with the determination of residual chlorine in the form of hypochlorite ion (ClO-) is in widespread demand. Several sensors including colorimetric, fluorometric, and electrochemical methods are currently in use, but detection limits and ease of application remain a challenge. In this work, two new cyanine derivatives-based ClO- sensors, that were prepared by solvent-free microwave synthesis, are reported. The two sensors are highly sensitive and selective to ClO-, exhibiting a noticeable color change visible to the naked eye. Additionally, the sensors can detect ClO- without interference from other potential water pollutants, with low detection limits of 7.43 ppb and 0.917 ppb based on absorption performance. When using fluorometric methods, the sensors' detection limits are pushed down to 0.025 ppb and 0.598 ppb for sensors I and II, respectively. The sensors can be loaded with paper strips for field and domestic detection of ClO- in tap water treatment installations. Using the quartz crystal microbalance (QCM) technique, these sensors showed strong detection sensitivity to ClO-, with detection limits of 0.256 ppm and 0.09 ppm for sensors I and II, respectively. Quantum chemical studies using density functional theory (DFT) calculations, natural bond orbital (NBO) analysis, molecular electrostatic potential (MESP), and time-dependent density functional theory (TD-DFT) supported the findings. The sensing mechanism is rationalized in terms of radical cation formation upon ClO- oxidation of cyanine sensors I and II.
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Affiliation(s)
- Nermeen S Hafez
- Chemistry Department, Faculty of Science, Tanta University, Tanta 31527, Egypt.
| | - Wael A Amer
- Chemistry Department, Faculty of Science, Tanta University, Tanta 31527, Egypt; Department of Chemistry, College of Science, University of Bahrain, Sakhir 32038, Bahrain
| | - Ehab A Okba
- Chemistry Department, Faculty of Science, Tanta University, Tanta 31527, Egypt
| | - Mahmoud A S Sakr
- Center of Basic Science, Misr University for Science and Technology, 6(TH) of October City, Egypt
| | | | - El-Zeiny M Ebeid
- Chemistry Department, Faculty of Science, Tanta University, Tanta 31527, Egypt; Center of Basic Science, Misr University for Science and Technology, 6(TH) of October City, Egypt
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AlQarni AO, Mahmoud AM, Ali R, El-Wekil MM. Colorimetric and fluorometric dual-mode determination of hypochlorite based on redox-mediated quenching. RSC Adv 2023; 13:32492-32501. [PMID: 37928853 PMCID: PMC10624236 DOI: 10.1039/d3ra05870k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Accepted: 10/30/2023] [Indexed: 11/07/2023] Open
Abstract
We have successfully created a dual-modal probe, labeled as of iron(ii)-ortho-phenanthroline/N, S@g-CDs, which combines both fluorometric and colorimetric techniques for the accurate and sensitive detection of hypochlorite (ClO-). The mechanism behind this probe involves the fluorescence quenching interaction between nitrogen and sulfur co-doped green emissive carbon dots (N, S@g-CDs) and the iron(ii)-ortho-phenanthroline chelate, utilizing both the inner filter effect and redox processes. As the concentration of ClO- increases, the iron(ii) undergo oxidation to iron(iii) as follows: Fe(ii) + 2HClO = Fe(iii) + Cl2O + H2O, leading to the restoration of N, S@g-CDs fluorescence. Simultaneously, the color of the system transitions gradually from red to colorless, enabling colorimetric measurements. In the fluorometric method with an excitation wavelength of 370 nm, the ClO- concentration exhibits a wide linear correlation with fluorescence intensity ranging from 0.07 to 220 μM. The detection limit achieved in this method is 0.02 μM (S/N = 3). In contrast, the colorimetric method exhibits a linear range of 1.12 to 200 μM, with a detection limit of 0.335 μM (S/N = 3). The proposed selective absorbance for this method is 510 nm. The probe has been effectively utilized for the detection of ClO- in various samples, including water and milk samples. This successful application showcases its potential for determining ClO- in complex matrices, highlighting its broad range of practical uses.
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Affiliation(s)
- Ali O AlQarni
- Department of Pharmaceutical Chemistry, College of Pharmacy, Najran University Najran 11001 Saudi Arabia
| | - Ashraf M Mahmoud
- Department of Pharmaceutical Chemistry, College of Pharmacy, Najran University Najran 11001 Saudi Arabia
| | - Ramadan Ali
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Tabuk Tabuk 71491 Saudi Arabia
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Al Azhar University Assiut Branch 71526 Egypt
| | - Mohamed M El-Wekil
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Assiut University Assiut 71526 Egypt
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You R, Huang Q, Lin Z, Wang W, Lie J, Chen J, Zhang G, Lu Y. Preparation of SERS base membrane with cellulose compound dopamine and determination of hypochlorite. Mikrochim Acta 2023; 190:447. [PMID: 37864774 DOI: 10.1007/s00604-023-06006-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2023] [Accepted: 09/18/2023] [Indexed: 10/23/2023]
Abstract
Flexible silver substrates were made by in situ reduction of silver nanoparticles in bacterial cellulose membranes using the unique advantage of dopamine. Subsequently, we modified the substrate with 4-mercaptophenol (4-MP), a molecule capable of specifically recognizing ClO-, and its corresponding SERS signal changes with the concentration of hypochlorite, thus allowing the quantitative detection of ClO- content. The method showed a negative linear correlation (R2 = 0.9567) with the SERS intensity at 1077 cm-1 over the concentration range 0.5-100 µM, and the detection limit was 0.15 µM. The RSD of the SERS intensity at 1077 cm-1 under five batches was 4.2%, which proved the good reproducibility of P-BCM-Ag NP-MP. Finally, the P-BCM-Ag NPs were used for the detection of hypochlorite in cell contents, artificial urine, and clinical serum samples, utilizing spike experiments in all three environments. The recoveries were in the range 90-110% indicating the accuracy of the method for the detection of hypochlorite and validating the promising application of this assay for practical detection in intricate biological samples.
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Affiliation(s)
- Ruiyun You
- College of Chemistry and Materials Science, Fujian Provincial Key Laboratory of Avanced Oriented Chemical Engineer, Fujian Key Laboratory of Polymer Materials, Engineering Research Center of Industrial Biocatalysis, Fujian Province Higher Education Institutes, Fujian Normal University, Fuzhou, 350007, Fujian, China
| | - Qian Huang
- College of Chemistry and Materials Science, Fujian Provincial Key Laboratory of Avanced Oriented Chemical Engineer, Fujian Key Laboratory of Polymer Materials, Engineering Research Center of Industrial Biocatalysis, Fujian Province Higher Education Institutes, Fujian Normal University, Fuzhou, 350007, Fujian, China
| | - Ziyi Lin
- College of Chemistry and Materials Science, Fujian Provincial Key Laboratory of Avanced Oriented Chemical Engineer, Fujian Key Laboratory of Polymer Materials, Engineering Research Center of Industrial Biocatalysis, Fujian Province Higher Education Institutes, Fujian Normal University, Fuzhou, 350007, Fujian, China
| | - Wenxi Wang
- College of Chemistry and Materials Science, Fujian Provincial Key Laboratory of Avanced Oriented Chemical Engineer, Fujian Key Laboratory of Polymer Materials, Engineering Research Center of Industrial Biocatalysis, Fujian Province Higher Education Institutes, Fujian Normal University, Fuzhou, 350007, Fujian, China
| | - Jiansen Lie
- College of Chemistry and Materials Science, Fujian Provincial Key Laboratory of Avanced Oriented Chemical Engineer, Fujian Key Laboratory of Polymer Materials, Engineering Research Center of Industrial Biocatalysis, Fujian Province Higher Education Institutes, Fujian Normal University, Fuzhou, 350007, Fujian, China
| | - Jingbo Chen
- Department of Medical Oncology, Shengli Clinical Medical College of Fujian Medical University, Fujian Provincial Hospital, Fuzhou, 350001, Fujian, China
| | - Guifeng Zhang
- Department of Medical Oncology, Shengli Clinical Medical College of Fujian Medical University, Fujian Provincial Hospital, Fuzhou, 350001, Fujian, China.
| | - Yudong Lu
- College of Chemistry and Materials Science, Fujian Provincial Key Laboratory of Avanced Oriented Chemical Engineer, Fujian Key Laboratory of Polymer Materials, Engineering Research Center of Industrial Biocatalysis, Fujian Province Higher Education Institutes, Fujian Normal University, Fuzhou, 350007, Fujian, China.
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Wang X, Li M, Duan T, Zou Y, Zhou X. A dual responsive fluorescent probe for selective detection of cysteine and bisulfite and its application in bioimaging. RSC Adv 2021; 12:874-877. [PMID: 35425127 PMCID: PMC8978911 DOI: 10.1039/d1ra08317a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Accepted: 12/17/2021] [Indexed: 12/30/2022] Open
Abstract
A coumarin-based dual responsive fluorescent probe with a simple structure was developed for the detection of Cys and HSO3 -. Under simulated physiological conditions, Cou-F displayed an on-off fluorescence response to Cys at 521 nm and an off-on fluorescence response to HSO3 - at 500 nm. Furthermore, Cou-F had the advantages of high sensitivity, strong specificity and rapid response. The detection limits of Cou-F toward Cys and HSO3 - were 0.54 μM and 0.65 μM, respectively. Cou-F enabled high selective responses to Cys and HSO3 - over other biologically related species. The response times of Cou-F toward Cys and HSO3 - were 80 s and 100 s. The fluorescence imaging of Cys and HSO3 - was achieved in living RAW246.7 cells.
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Affiliation(s)
- Xiaofeng Wang
- Department of Otolaryngology, Head and Neck Surgery, The First Affiliated Hospital of Hainan Medical University Haikou 570102 China
| | - Mingshun Li
- School of Pharmaceutical Sciences, Southern Medical University Guangzhou 510515 China
| | - Tingting Duan
- Department of Otolaryngology, Head and Neck Surgery, The First Affiliated Hospital of Hainan Medical University Haikou 570102 China
| | - Yuxia Zou
- Department of Otolaryngology, Head and Neck Surgery, The First Affiliated Hospital of Hainan Medical University Haikou 570102 China
| | - Xuejun Zhou
- Department of Otolaryngology, Head and Neck Surgery, The First Affiliated Hospital of Hainan Medical University Haikou 570102 China
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