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Mu X, Xu J, Zeng F. A Novel and Sensitive Fluorescent Probe for Glyphosate Detection Based on Cu 2+ Modulated Polydihydroxyphenylalanine Nanoparticles. BIOSENSORS 2023; 13:bios13050510. [PMID: 37232871 DOI: 10.3390/bios13050510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Revised: 04/25/2023] [Accepted: 04/25/2023] [Indexed: 05/27/2023]
Abstract
A novel and sensitive fluorescent probe based on Cu2+-modulated polydihydroxyphenylalanine nanoparticles (PDOAs) has been developed for the detection of glyphosate pesticides. Compared to conventional instrumental analysis techniques, fluorometric methods have obtained good results in the field of agricultural residue detection. However, most of the fluorescent chemosensors reported still have some limitations, such as long response times, the high limit of detection, and complex synthetic procedures. In this paper, a novel and sensitive fluorescent probe based on Cu2+ modulated polydihydroxyphenylalanine nanoparticles (PDOAs) has been developed for the detection of glyphosate pesticides. The fluorescence of PDOAs can be effectively quenched by Cu2+ through the dynamic quenching process, which was confirmed by the time-resolved fluorescence lifetime analysis. In the presence of glyphosate, the fluorescence of the PDOAs-Cu2+ system can be effectively recovered due to the higher affinity of glyphosate for Cu2+, and thus released the individual PDOAs. Due to the admirable properties such as high selectivity to glyphosate pesticide, "turn on" fluorescence response, and ultralow detection limit of 1.8 nM, the proposed method has been successfully applied for the determination of glyphosate in environmental water samples.
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Affiliation(s)
- Xiqiong Mu
- Research & Development Center for Eco-Material and Eco-Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- College of Pharmacy, Gansu University of Chinese Medicine, Lanzhou 730101, China
| | - Jian Xu
- Research & Development Center for Eco-Material and Eco-Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Fankui Zeng
- Research & Development Center for Eco-Material and Eco-Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
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2
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Li G, Liu Z, Gao W, Tang B. Recent advancement in graphene quantum dots based fluorescent sensor: Design, construction and bio-medical applications. Coord Chem Rev 2023. [DOI: 10.1016/j.ccr.2022.214966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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3
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Mu XQ, Wang D, Meng LY, Wang YQ, Chen J. Glutathione-modified graphene quantum dots as fluorescent probes for detecting organophosphorus pesticide residues in Radix Angelica Sinensis. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 286:122021. [PMID: 36283209 DOI: 10.1016/j.saa.2022.122021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2022] [Revised: 10/14/2022] [Accepted: 10/17/2022] [Indexed: 06/16/2023]
Abstract
A novel fluorescent sensor was developed in this study based on glutathione-functionalized graphene quantum dots (GQDs@GSH) to detect organophosphorus pesticide residues in Radix Angelica Sinensis. GQDs@GSH was synthesized by a one-step pyrolysis method with a fluorescence quantum yield as high as 33.9% and its structure was characterized by transmission electron microscopy and X-ray photoelectron spectroscopy. GQDs@GSH exhibited excellent fluorescence property showing strong blue fluorescence under UV irradiation. The fluorescence of GQDs@GSH could be quenched by Fe3+ by electron transfer and the quenched fluorescence could be recovered due to the strong chelating and reducing ability of phytic acid (PA). Under the catalyzation of acetylcholinesterase (AChE) and choline oxidase (ChOx), acetylcholine (ACh) could be decomposed to H2O2, which could further oxidize Fe2+ to Fe3+ thus quenching the fluorescence of GQDs@GSH once again. Coumaphos, a kind of organophosphorus pesticide, could inhibit AChE activity, thus making the quenched fluorescence turn on again. Several parameters influencing the fluorescence response such as Fe3+, PA, ACh and coumaphos concentration, pH value and reaction time were optimized. Based on such a fluorescence "off-on-off-on" ngkmechanism, GQDs@GSH was successfully applied to the detection of coumaphos in Radix Angelica Sinensis. A good linear relationship between the fluorescence intensity and coumaphos concentration was obtained in the range of 0.1-10.0 μmol·L-1. By a standard addition method, the recoveries were measured to be 101.44-117.90% with RSDs lower than 1.98%. The biosensor system is simple, sensitive and accurate. It has a good application prospect in the detection of organophosphorus pesticide residues in traditional Chinese medicine and agricultural products, and also expanded the application scope for glutathione as a highly selective biological molecule.
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Affiliation(s)
- Xi-Qiong Mu
- School of Pharmacy, Gansu University of Chinese Medicine, Lanzhou 730101, China
| | - Dan Wang
- School of Pharmacy, Gansu University of Chinese Medicine, Lanzhou 730101, China
| | - Ling-Yu Meng
- School of Pharmacy, Gansu University of Chinese Medicine, Lanzhou 730101, China
| | - Yin-Quan Wang
- School of Pharmacy, Gansu University of Chinese Medicine, Lanzhou 730101, China; Northwest Collaborative Innovation Center for Traditional Chinese Medicine Co-constructed by Gansu Province & MOE of PRC, Lanzhou 730000, China.
| | - Juan Chen
- School of Pharmacy, Lanzhou University, Lanzhou 730101, China.
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4
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He H, Sun DW, Wu Z, Pu H, Wei Q. On-off-on fluorescent nanosensing: Materials, detection strategies and recent food applications. Trends Food Sci Technol 2022. [DOI: 10.1016/j.tifs.2021.11.029] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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5
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Sulfur quantum dots: A novel fluorescent probe for sensitive and selective detection of Fe3+ and phytic acid. Microchem J 2021. [DOI: 10.1016/j.microc.2021.106656] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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6
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Ebrahimi M, Norouzi P, Aazami H, Moosavi-Movahedi AA. Review on oxidative stress relation on COVID-19: Biomolecular and bioanalytical approach. Int J Biol Macromol 2021; 189:802-818. [PMID: 34418419 PMCID: PMC8372478 DOI: 10.1016/j.ijbiomac.2021.08.095] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Revised: 08/08/2021] [Accepted: 08/12/2021] [Indexed: 02/07/2023]
Abstract
COVID-19 disease has put life of people in stress worldwide from many aspects. Since the virus has mutated in absolutely short period of time the challenge to find a suitable vaccine has become harder. Infection to COVID-19, especially at severe life threatening states is highly dependent on the strength of the host immune system. This system is partially dependent on the balance between oxidative stress and antioxidant. Besides, this virus still has unknown mechanism of action companied by a probable commune period. From another hand, some reactive oxygen species (ROS) levels can be helpful on the state determination of the disease. Thus it could be possible to use modern bioanalytical techniques for their detection and determination, which could indicate the disease state at the golden time window since they have the potential to show whether specific DNA, RNA, enzymes and proteins are affected. This also could be used as a preclude study or a reliable pathway to define the best optimized time of cure beside effective medical actions. Herein, some ROS and their relation with SARS-CoV-2 virus have been considered. In addition, modern bioelectroanalytical techniques on this approach from quantitative and qualitative points of view have been reviewed.
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Affiliation(s)
- Mehrnaz Ebrahimi
- Center of Excellence in Electrochemistry, School of Chemistry, College of Science, University of Tehran, Tehran, Iran
| | - Parviz Norouzi
- Center of Excellence in Electrochemistry, School of Chemistry, College of Science, University of Tehran, Tehran, Iran.
| | - Hossein Aazami
- Endocrinology and Metabolism Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
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7
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Ahmed A, Hayat A, Nawaz MH, Chaudhry AA, John P, Nasir M. Fluorescence quenching mediated detection of hydrogen peroxide using tungsten incorporated graphitic carbon nitride nanoflakes. RSC Adv 2021; 11:7479-7491. [PMID: 35423270 PMCID: PMC8694944 DOI: 10.1039/d0ra10463a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2020] [Accepted: 02/08/2021] [Indexed: 11/21/2022] Open
Abstract
A reliable, non-enzymatic detection for H2O2 with high sensitivity and accuracy is of profound importance and getting considerable interest due to its usefulness in biological systems. Therefore, this work was aimed to develop a sensitive method for the detection of H2O2 using rhodamine B as a fluorescence system and tungsten doped graphitic carbon nitride (W/GCN) as catalysts. Fluorescence quenching and colorimetric properties of the chromogenic-dye probe were used as a detection strategy of H2O2. The enhanced catalytic property of nanoflakes of W/GCN was attributed to the unique structural characteristics, influenced by the dopant, that not only tuned its bandgap but also enhanced separation of electron-hole pairs as compared to planar and larger sized nanosheets of pristine GCN. This low-cost and rapid assay offered a very low limit of detection of 8 nM for the fluorescence quenching method and 20 nM for the colorimetric method. The linear range for fluorescence quenching and colorimetric H2O2 assays were from 10-500 nM and 35-400 nM, respectively. Therefore, this novel method of using W/GCN nanoflakes in fluorescence quenching and colorimetric based detections of H2O2 is expected to catch more interest on the topic of using non-enzymatic platforms for sensitive and selective detection of different analysts.
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Affiliation(s)
- Aftab Ahmed
- Interdisciplinary Research Centre in Biomedical Materials (IRCBM), COMSATS University Islamabad, Lahore Campus 1.5 km Defence Road, Off Raiwind Road Lahore Punjab 54000 Pakistan +92-42-5321090 +92-42-111-001-007 ext. 828, 829.,Government College University Lahore Katchery Road, Anarkali Lahore Punjab 54000 Pakistan
| | - Akhtar Hayat
- Interdisciplinary Research Centre in Biomedical Materials (IRCBM), COMSATS University Islamabad, Lahore Campus 1.5 km Defence Road, Off Raiwind Road Lahore Punjab 54000 Pakistan +92-42-5321090 +92-42-111-001-007 ext. 828, 829
| | - Mian Hasnain Nawaz
- Interdisciplinary Research Centre in Biomedical Materials (IRCBM), COMSATS University Islamabad, Lahore Campus 1.5 km Defence Road, Off Raiwind Road Lahore Punjab 54000 Pakistan +92-42-5321090 +92-42-111-001-007 ext. 828, 829
| | - Aqif Anwar Chaudhry
- Interdisciplinary Research Centre in Biomedical Materials (IRCBM), COMSATS University Islamabad, Lahore Campus 1.5 km Defence Road, Off Raiwind Road Lahore Punjab 54000 Pakistan +92-42-5321090 +92-42-111-001-007 ext. 828, 829
| | - Peter John
- Government College University Lahore Katchery Road, Anarkali Lahore Punjab 54000 Pakistan
| | - Muhammad Nasir
- Interdisciplinary Research Centre in Biomedical Materials (IRCBM), COMSATS University Islamabad, Lahore Campus 1.5 km Defence Road, Off Raiwind Road Lahore Punjab 54000 Pakistan +92-42-5321090 +92-42-111-001-007 ext. 828, 829
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8
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Analytical Methods for Determination of Phytic Acid and Other Inositol Phosphates: A Review. Molecules 2020; 26:molecules26010174. [PMID: 33396544 PMCID: PMC7795710 DOI: 10.3390/molecules26010174] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 12/28/2020] [Accepted: 12/29/2020] [Indexed: 12/12/2022] Open
Abstract
From the early precipitation-based techniques, introduced more than a century ago, to the latest development of enzymatic bio- and nano-sensor applications, the analysis of phytic acid and/or other inositol phosphates has never been a straightforward analytical task. Due to the biomedical importance, such as antinutritional, antioxidant and anticancer effects, several types of methodologies were investigated over the years to develop a reliable determination of these intriguing analytes in many types of biological samples; from various foodstuffs to living cell organisms. The main aim of the present work was to critically overview the development of the most relevant analytical principles, separation and detection methods that have been applied in order to overcome the difficulties with specific chemical properties of inositol phosphates, their interferences, absence of characteristic signal (e.g., absorbance), and strong binding interactions with (multivalent) metals and other biological molecules present in the sample matrix. A systematical and chronological review of the applied methodology and the detection system is given, ranging from the very beginnings of the classical gravimetric and titrimetric analysis, through the potentiometric titrations, chromatographic and electrophoretic separation techniques, to the use of spectroscopic methods and of the recently reported fluorescence and voltammetric bio- and nano-sensors.
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9
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Ahmed A, Hayat A, Nawaz MH, John P, Nasir M. Graphitic carbon nitride for efficient fluorometric quenching bioassay of hydrogen peroxide: Effect of structure on Properties. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2020.112731] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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10
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do Prado Ferreira M, Teixeira Tarley CR. Assessment of in vitro bioacessibility of macrominerals and trace elements in green banana flour. J Food Compost Anal 2020. [DOI: 10.1016/j.jfca.2020.103586] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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11
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Dey N. Naked-eye sensing of phytic acid at sub-nanomolar levels in 100% water medium by a charge transfer complex derived from off-the-shelf ingredients. Analyst 2020; 145:4937-4941. [PMID: 32496500 DOI: 10.1039/d0an00671h] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Naked-eye sensing of phytic acid, one of the most abundant antinutrients, was achieved in 100% water medium using a charge transfer complex, composed of pyranine and methyl viologen. Since both the ingredients are commercially available, the design of such sensory systems needs zero synthetic effort, which essentially makes it economically viable. Only the physical mixture of both of these compounds showed a color-changing response from brown to yellow in the presence of phytic acid with a turn-on fluorescence response (LOD: 0.56 nM). The electrostatic interaction leads to charge pairing between phytic acid and methyl viologen, which releases free pyranine in solution. Considering its high sensitivity, low-cost test strips were developed for the on-site detection of phytic acid, even in remote locations. Additionally, estimation of phytic acid was achieved in grain samples with a sufficiently high accuracy, as evident from a sufficiently low relative standard deviation (<5%).
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Affiliation(s)
- Nilanjan Dey
- Department of Undergraduate Studies, Indian Institute of Science, Bangalore-560012, Karnataka, India.
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12
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Mansuriya BD, Altintas Z. Applications of Graphene Quantum Dots in Biomedical Sensors. SENSORS (BASEL, SWITZERLAND) 2020; 20:E1072. [PMID: 32079119 PMCID: PMC7070974 DOI: 10.3390/s20041072] [Citation(s) in RCA: 89] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/25/2020] [Revised: 02/12/2020] [Accepted: 02/13/2020] [Indexed: 01/02/2023]
Abstract
Due to the proliferative cancer rates, cardiovascular diseases, neurodegenerative disorders, autoimmune diseases and a plethora of infections across the globe, it is essential to introduce strategies that can rapidly and specifically detect the ultralow concentrations of relevant biomarkers, pathogens, toxins and pharmaceuticals in biological matrices. Considering these pathophysiologies, various research works have become necessary to fabricate biosensors for their early diagnosis and treatment, using nanomaterials like quantum dots (QDs). These nanomaterials effectively ameliorate the sensor performance with respect to their reproducibility, selectivity as well as sensitivity. In particular, graphene quantum dots (GQDs), which are ideally graphene fragments of nanometer size, constitute discrete features such as acting as attractive fluorophores and excellent electro-catalysts owing to their photo-stability, water-solubility, biocompatibility, non-toxicity and lucrativeness that make them favorable candidates for a wide range of novel biomedical applications. Herein, we reviewed about 300 biomedical studies reported over the last five years which entail the state of art as well as some pioneering ideas with respect to the prominent role of GQDs, especially in the development of optical, electrochemical and photoelectrochemical biosensors. Additionally, we outline the ideal properties of GQDs, their eclectic methods of synthesis, and the general principle behind several biosensing techniques.
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Affiliation(s)
| | - Zeynep Altintas
- Technical University of Berlin, Straße des 17. Juni 124, 10623 Berlin, Germany;
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13
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Wang N, Wang M, Yu Y, Yang G, Su X. Label-free fluorescence assay based on near-infrared B,N-doped carbon dots as a fluorescent probe for the detection of sialic acid. NEW J CHEM 2020. [DOI: 10.1039/c9nj05981d] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
A simple and sensitive sensing strategy for sialic acid activity detection on the basis of novel near-infrared B,N co-doped carbon dots was constructed.
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Affiliation(s)
- Nan Wang
- Department of Analytical Chemistry
- College of Chemistry
- Jilin University
- Changchun 130012
- China
| | - Mengke Wang
- Department of Analytical Chemistry
- College of Chemistry
- Jilin University
- Changchun 130012
- China
| | - Yang Yu
- State Key Lab of Supramolecular Structure and Materials
- College of Chemistry
- Jilin University
- Changchun
- P. R. China
| | - Guojian Yang
- State Key Lab of Supramolecular Structure and Materials
- College of Chemistry
- Jilin University
- Changchun
- P. R. China
| | - Xingguang Su
- Department of Analytical Chemistry
- College of Chemistry
- Jilin University
- Changchun 130012
- China
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14
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Nitrogen-doped graphene oxide as a catalyst for the oxidation of Rhodamine B by hydrogen peroxide: application to a sensitive fluorometric assay for hydrogen peroxide. Mikrochim Acta 2019; 187:47. [PMID: 31845299 DOI: 10.1007/s00604-019-3994-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2019] [Accepted: 10/31/2019] [Indexed: 10/25/2022]
Abstract
The authors report that nitrogen-doped graphene oxide (NGO) catalyzes the oxidative decomposition of the fluorophore Rhodamine B (RhB) by hydrogen peroxide. The catalytic decomposition of hydrogen peroxide yields free hydroxyl radicals that destroy RhB so that the intensity of the yellow fluorescence is reduced. Nitrogen doping enhances the electronic and optical properties and surface chemical reactivities of GO such as widening of bandgap, increase in conductivity, enhanced quenching and adsorbing capabilities etc. The catalytic properties of NGO are attributed to its large specific surface and high electron affinity of nitrogen atoms. The chemical and structural properties of GO and NGO were characterized by XRD, FTIR, SEM, UV-visible and Raman spectroscopies. The method was optimized by varying the concentration of RhB, nitrogen dopant and hydrogen peroxide. The fluorescent probe, best operated at excitation/emission wavelengths of 554/577 nm, allows hydrogen peroxide to be determined in concentrations as low as 94 pM with a linear range spanning from 1 nM to 1 μM. Graphical abstract Schematic illustration of a fluorescence quenching method for the determination of H2O2. Upon addition of H2O2, nitrogen-doped graphene oxide (NGO) catalyzes the oxidation of Rhodamine B dye due to hydroxyl radical generation, which leads to a sensitive quenchometric methd for H2 O2.
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15
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Li W, Cao Z, Liu R, Liu L, Li H, Li X, Chen Y, Lu C, Liu Y. AuNPs as an important inorganic nanoparticle applied in drug carrier systems. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2019; 47:4222-4233. [DOI: 10.1080/21691401.2019.1687501] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Wen Li
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China
| | - Zhiwen Cao
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China
| | - Rui Liu
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China
| | - Linlin Liu
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China
| | - Hui Li
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China
| | - Xiang Li
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China
| | - Youwen Chen
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China
| | - Cheng Lu
- Institute of Basic Research in Clinical Medicine, China Academy of Chinese Medical Sciences, Beijing, China
| | - Yuanyan Liu
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China
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16
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Yang X, Cui F, Ren R, Sun J, Ji J, Pi F, Zhang Y, Sun X. Red-Emissive Carbon Dots for "Switch-On" Dual Function Sensing Platform Rapid Detection of Ferric Ions and l-Cysteine in Living Cells. ACS OMEGA 2019; 4:12575-12583. [PMID: 31460378 PMCID: PMC6682130 DOI: 10.1021/acsomega.9b01019] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2019] [Accepted: 06/24/2019] [Indexed: 05/25/2023]
Abstract
Ferric ions (Fe3+ ions) and l-cysteine (( l-Cys) in the human body have always played an irreplaceable role in biological processes, and overload or deficiency of Fe3+ ions and l-Cys in the biological system leads to various diseases. In this work, N,S-co-doped red-emitting carbon dots (R-CDs) were synthesized by a facile hydrothermal method. Because the doping of N and S gives a unique functional group distribution on the surface of R-CDs, it can be complexed with Fe3+ ions to construct an energy transfer quenching system. However, the presence of l-Cys competitively binds to Fe3+ ions, thus resulting in the photoluminescence recovery of R-CDs. Therefore, a "switch-on" dual function sensing platform has successfully been developed based on R-CDs for rapid identification and quantification of Fe3+ ions and l-Cys. The linear detection range of Fe3+ ions is 0-30 μM (limit of detection (LOD): 0.27 μM) and that of l-Cys is 0-24 μM (LOD: 0.14 μM). The sensor platform was used to detect Fe3+ ions and l-Cys in human serum samples with satisfactory results. Compared with traditional detection methods, this method is more time-saving and efficient and can be completed in 3 min. It is worth mentioning that the R-CDs not only has high optical stability but also has negligible cytotoxicity and has been successfully applied to in vitro/vivo imaging, indicating that R-CDs have excellent tissue penetration and biomarker potential. More interestingly, the switch-on fluorescence behavior for stepwise detection of Fe3+ ions and l-Cys can also be observed in cell imaging, which provides the possibility of visual detection of the probe to be applied in vivo.
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Affiliation(s)
- Xingxing Yang
- State
Key Laboratory of Food Science and Technology, School of Food Science
and Technology, National Engineering Research Center for Functional
Foods, School of Food Science Synergetic Innovation Center of Food
Safety and Nutrition, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Fangchao Cui
- State
Key Laboratory of Food Science and Technology, School of Food Science
and Technology, National Engineering Research Center for Functional
Foods, School of Food Science Synergetic Innovation Center of Food
Safety and Nutrition, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Rong Ren
- School
of Foreign Studies, Shaanxi University of
Technology, Hanzhong, Shaanxi 723000, People’s Republic of China
| | - Jiadi Sun
- State
Key Laboratory of Food Science and Technology, School of Food Science
and Technology, National Engineering Research Center for Functional
Foods, School of Food Science Synergetic Innovation Center of Food
Safety and Nutrition, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Jian Ji
- State
Key Laboratory of Food Science and Technology, School of Food Science
and Technology, National Engineering Research Center for Functional
Foods, School of Food Science Synergetic Innovation Center of Food
Safety and Nutrition, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Fuwei Pi
- State
Key Laboratory of Food Science and Technology, School of Food Science
and Technology, National Engineering Research Center for Functional
Foods, School of Food Science Synergetic Innovation Center of Food
Safety and Nutrition, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Yinzhi Zhang
- State
Key Laboratory of Food Science and Technology, School of Food Science
and Technology, National Engineering Research Center for Functional
Foods, School of Food Science Synergetic Innovation Center of Food
Safety and Nutrition, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Xiulan Sun
- State
Key Laboratory of Food Science and Technology, School of Food Science
and Technology, National Engineering Research Center for Functional
Foods, School of Food Science Synergetic Innovation Center of Food
Safety and Nutrition, Jiangnan University, Wuxi, Jiangsu 214122, China
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17
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Liu Y, Tang X, Deng M, Cao Y, Li Y, Zheng H, Li F, Yan F, Lan T, Shi L, Gao L, Huang L, Zhu T, Lin H, Bai Y, Qu D, Huang X, Qiu F. Nitrogen doped graphene quantum dots as a fluorescent probe for mercury(II) ions. Mikrochim Acta 2019; 186:140. [PMID: 30707370 DOI: 10.1007/s00604-019-3249-4] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Accepted: 01/05/2019] [Indexed: 01/15/2023]
Abstract
A highly selective fluorescent probe for Hg2+ is reported. It consists of nitrogen doped graphene quantum dots (NGQDs) that are nearly spherical in shape, have an average diameter of 2.7 nm and excitation-independent emission. The blue fluorescence of the NGQDs (with maximum excitation/emission at 378/447 nm) is quenched by Hg2+ due to both dynamic and static quenching. The probe has a wide detection range (2.5 μM - 800 μM) and a limit of detection of 2.5 μM. The dynamic and static quenching constants are 417 M-1 and 63500 M-1, respectively. The probe was used to quantfy Hg2+ in spiked real water samples with satisfactory results. Graphical abstract ᅟ.
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Affiliation(s)
- Yongfeng Liu
- Key Laboratory of Optoelectronic Technology & Systems of the Education Ministry of China, College of Optoelectronic Engineering, Chongqing University, Chongqing, 400044, China
| | - Xiaosheng Tang
- Key Laboratory of Optoelectronic Technology & Systems of the Education Ministry of China, College of Optoelectronic Engineering, Chongqing University, Chongqing, 400044, China
| | - Ming Deng
- Key Laboratory of Optoelectronic Technology & Systems of the Education Ministry of China, College of Optoelectronic Engineering, Chongqing University, Chongqing, 400044, China
| | - Yulong Cao
- Key Laboratory of Optoelectronic Technology & Systems of the Education Ministry of China, College of Optoelectronic Engineering, Chongqing University, Chongqing, 400044, China
| | - Yujia Li
- Key Laboratory of Optoelectronic Technology & Systems of the Education Ministry of China, College of Optoelectronic Engineering, Chongqing University, Chongqing, 400044, China
| | - Hua Zheng
- Key Laboratory of Optoelectronic Technology & Systems of the Education Ministry of China, College of Optoelectronic Engineering, Chongqing University, Chongqing, 400044, China
| | - Fuhui Li
- Key Laboratory of Optoelectronic Technology & Systems of the Education Ministry of China, College of Optoelectronic Engineering, Chongqing University, Chongqing, 400044, China
| | - Fabin Yan
- Key Laboratory of Optoelectronic Technology & Systems of the Education Ministry of China, College of Optoelectronic Engineering, Chongqing University, Chongqing, 400044, China
| | - Tianyi Lan
- Key Laboratory of Optoelectronic Technology & Systems of the Education Ministry of China, College of Optoelectronic Engineering, Chongqing University, Chongqing, 400044, China
| | - Leilei Shi
- Key Laboratory of Optoelectronic Technology & Systems of the Education Ministry of China, College of Optoelectronic Engineering, Chongqing University, Chongqing, 400044, China
| | - Lei Gao
- Key Laboratory of Optoelectronic Technology & Systems of the Education Ministry of China, College of Optoelectronic Engineering, Chongqing University, Chongqing, 400044, China
| | - Ligang Huang
- Key Laboratory of Optoelectronic Technology & Systems of the Education Ministry of China, College of Optoelectronic Engineering, Chongqing University, Chongqing, 400044, China
| | - Tao Zhu
- Key Laboratory of Optoelectronic Technology & Systems of the Education Ministry of China, College of Optoelectronic Engineering, Chongqing University, Chongqing, 400044, China.
| | - Hao Lin
- Key Laboratory of Optoelectronic Technology & Systems of the Education Ministry of China, College of Optoelectronic Engineering, Chongqing University, Chongqing, 400044, China
| | - Yongzhong Bai
- State Key Laboratory of Safety and Control for Chemicals, SINOPEC Research Institute of Safety Engineering, Qingdao, 266000, China
| | - Dingrong Qu
- State Key Laboratory of Safety and Control for Chemicals, SINOPEC Research Institute of Safety Engineering, Qingdao, 266000, China
| | - Xianbin Huang
- State Key Laboratory of Safety and Control for Chemicals, SINOPEC Research Institute of Safety Engineering, Qingdao, 266000, China
| | - Feng Qiu
- State Key Laboratory of Safety and Control for Chemicals, SINOPEC Research Institute of Safety Engineering, Qingdao, 266000, China
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