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Abdel-Hakim A, Belal F, Hammad MA, Elgaml A, El-Maghrabey M. Aliphatic substrates-mediated unique rapid room temperature synthesis of carbon quantum dots for fenofibrate versatile analysis. Anal Chim Acta 2025; 1337:343539. [PMID: 39800498 DOI: 10.1016/j.aca.2024.343539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2024] [Revised: 11/06/2024] [Accepted: 12/09/2024] [Indexed: 05/02/2025]
Abstract
BACKGROUND The current synthetic strategies for carbon dots (CDs) are usually time-consuming, rely on complicated processes, and need high temperatures and energy. Recent studies have successfully synthesized CDs at room temperature. Unfortunately, most CDs synthesized at room temperature are obtained under harsh reaction conditions, prepared using aromatic precursors, or need a long time to generate. Therefore, an energy-free room-temperature rapid synthesis of CDs under mild conditions using aliphatic substrates is important. We aim to provide an innovative approach to synthesizing CDs to be used to develop the first fluorescence-based assay of the non-fluorescent anti-hyperlipidemic drug, fenofibrate. RESULTS We report an innovative, energy-free, and room-temperature preparation of fluorescent N-doped CDs utilizing aliphatic substrates in only 20 min. The synthesis was based on a self-exothermic Schiff base condensation reaction between methylglyoxal and ethylenediamine. The prepared CDs' antibacterial properties, biocompatibility, and cell-imaging ability were investigated. The fluorescence signal of the CDs was quantitively quenched upon adding increasing concentrations of fenofibrate in the range of 0.50-15.0 μg/mL. Therefore, the prepared CDs were applied as a nanosensor to develop the first fluorescence-based assay of fenofibrate. The reliability of the synthesized nanosensor was confirmed by the successful quantification of fenofibrate in pharmaceutical dosage forms, environmental water, weight loss herbal products, and dietary supplements. The obtained recovery ranged from 95.33 to 104.58 %. In addition, the minimal environmental impact of the developed fenofibrate sensing strategy was confirmed using the recently reported metrics. SIGNIFICANCE AND NOVELTY The key advantage of this work is the use of an energy-free approach to synthesize CDs rapidly under mild conditions without aromatic substrates. This opens a new window for the eco-friendly synthesis of CDs that avoids the drawbacks of the traditional methods. Additionally, it is the first fluorescence nanosensor for sensing fenofibrate in various matrices, avoiding the limitations of the previous methods, such as high cost, poor selectivity, and low sensitivity.
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Affiliation(s)
- Ali Abdel-Hakim
- Department of Analytical Chemistry, Faculty of Pharmacy, University of Sadat City, Sadat City, 32897, Monufia, Egypt; Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura, 35516, Egypt
| | - Fathalla Belal
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura, 35516, Egypt
| | - Mohamed A Hammad
- Department of Analytical Chemistry, Faculty of Pharmacy, University of Sadat City, Sadat City, 32897, Monufia, Egypt
| | - Abdelaziz Elgaml
- Department of Microbiology and Immunology, Faculty of Pharmacy, Mansoura University, Mansoura, 35516, Egypt; Department of Microbiology and Immunology, Faculty of Pharmacy, Horus University, New Damietta, 34518, Egypt
| | - Mahmoud El-Maghrabey
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura, 35516, Egypt.
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Abdel-Hakim A, Belal F, Hammad MA, Kishikawa N, El-Maghrabey M. Adoption of self-exothermic reaction for synthesis of multifunctional carbon quantum dots: Applications to vincristine sensing and cell imaging. Talanta 2025; 282:126971. [PMID: 39366245 DOI: 10.1016/j.talanta.2024.126971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2024] [Revised: 09/22/2024] [Accepted: 09/27/2024] [Indexed: 10/06/2024]
Abstract
This work introduces an extremely easy method for preparing luminescent carbon dots (CDs) at ambient temperature using 1,2-naphthoquinone sulphonate and ethylenediamine as precursors via self-exothermic reaction without energy input. The as-obtained CDs have a high quantum yield (34.1 %), a production yield of 21.2 %, and a small size diameter (3.44 nm). Various techniques (NMR, TEM, EDX-mapping, XPS, XRD, FT-IR, fluorescence, and UV-visible spectroscopy) were used to characterize the prepared CDs. The CDs exhibited an excitation-independent emission with λex of 275 nm, demonstrating their homogeneity and high purity. The anticancer drug vincristine (VCR) quantitively quenched the fluorescent signal of the synthesized CDs, allowing their application as the first fluorescent nano-sensor to determine VCR. The quenching effect was linear within the range of 0.2-5.0 μg mL-1, enabling the determination of VCR in vials, plasma, and for content uniformity testing with a detection limit of 0.06 μg mL-1. Moreover, the synthesized CDs were employed as a bio-sensing platform to detect VCR in cancer cells owing to their good selectivity, excellent biocompatibility, minimal cytotoxicity, and high stability. The fabrication of CDs with excellent properties at room temperature under mild conditions paves the way for new advancements in the room temperature synthesis of CDs and offers a highly efficient alternative to traditional synthesis approaches.
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Affiliation(s)
- Ali Abdel-Hakim
- Analytical Chemistry Department, Faculty of Pharmacy, University of Sadat City, Sadat City, 32897, Monufia, Egypt; Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Mansoura University, Mansoura, 35516, Egypt
| | - Fathalla Belal
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Mansoura University, Mansoura, 35516, Egypt
| | - Mohamed A Hammad
- Analytical Chemistry Department, Faculty of Pharmacy, University of Sadat City, Sadat City, 32897, Monufia, Egypt
| | - Naoya Kishikawa
- Graduate School of Biomedical Sciences, Course of Pharmaceutical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki, 852-8521, Japan
| | - Mahmoud El-Maghrabey
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Mansoura University, Mansoura, 35516, Egypt; Graduate School of Biomedical Sciences, Course of Pharmaceutical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki, 852-8521, Japan.
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Chen J, Mao C, Ye H, Gao X, Zhao L. Natural biomass carbon Dots-Based fluorescence sensor for high precision detection of vitamin B12 in serum. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 305:123459. [PMID: 37827002 DOI: 10.1016/j.saa.2023.123459] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Revised: 09/05/2023] [Accepted: 09/24/2023] [Indexed: 10/14/2023]
Abstract
Vitamin B12(Vit B12) is an essential micronutrient for body growth, and abnormal levels of Vit B12 in the human body are closely associated with the prediction of certain diseases. Hence, a rapid, sensitive, and environment-friendly approach for Vit B12 detection was set up. Herein, the Bird's nest carbon dots (B-CDs) are synthesized by using a bird's nest and distilled water as precursors. One-step hydrothermal synthesis has created B-CDs without toxic ingredients or surface chemical modifications. The prepared B-CDs exhibited outstanding characteristics including excellent water solubility, brilliant fluorescence performance great biocompatibility, and fine stability in a broad pH range of 3.0-11.0 and high ionic strength solution. The experiment revealed that the fluorescence of the reaction system showed a regular decrease after the interaction of B-CDs with Vit B12. Additionally, there was an excellent linear relationship between the F/F0 of B-CDs and the concentration of Vit B12. The linear range was 0 ∼ 100 µM, R2 was 0.9929, and the detection limit was 0.24 µM. Finally, the proposed method successfully detected Vit B12 in human serum samples with recoveries of 96.2 %-100.3 %, showing broad clinical prospects.
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Affiliation(s)
- Jueling Chen
- School of Pharmacy, Shenyang Pharmaceutical University, Shenyang, Liaoning, 110016, China
| | - Chunling Mao
- School of Pharmacy, Shenyang Pharmaceutical University, Shenyang, Liaoning, 110016, China
| | - Heng Ye
- School of Pharmacy, Shenyang Pharmaceutical University, Shenyang, Liaoning, 110016, China
| | - Xun Gao
- Co-Innovation Center of Jiangsu Marine Bio-Industry Technology, Jiangsu Ocean University, Lianyungang222001,China.
| | - Longshan Zhao
- School of Pharmacy, Shenyang Pharmaceutical University, Shenyang, Liaoning, 110016, China.
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Wang X, Yuan Y, Sun Y, Liu X, Ma M, Zhang R, Shi F. One-step facile preparation of carbon dots with high fluorescence quantum yield and application in rapid latent fingerprint detection. RSC Adv 2022; 12:27199-27205. [PMID: 36276032 PMCID: PMC9511228 DOI: 10.1039/d2ra05397g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Accepted: 09/20/2022] [Indexed: 11/21/2022] Open
Abstract
The development of luminescent materials greatly affects the development of fluorescence imaging technology. The preparation of carbon dots (CDs) with high photoluminescence quantum yield (PLQY) in the solid-state is challenging due to excessive resonance energy transfer (RET) and direct π-π interactions. In this study, we synthesized carbon dots that exhibit green fluorescence (GCDs) with absolute PLQYs up to 35.65% in one step by a microwave-assisted method. In the solid-state, the absolute PLQY reached 19.25%. Then, the GCDs were mixed with soluble starch in appropriate proportions, which improved the adsorption and dispersion of the GCDs and greatly reduced the cost of the fingerprint powder, and increased the absolute PLQY of the fingerprint powder to 41.75%. Finally, we prepared GCDs for preliminary fabrication of luminescent films, and the GCD-starch powder was successfully applied to high-quality latent fingerprint (LFP) imaging. The related properties of GCDs and the LFP detection performance of fingerprint detection powders prepared by GCDs were studied in detail. The results showed that the LFP system developed with GCDs-starch powder visualized LFPs with high definition and contrast under different conditions, and GCDs had potential for application in light-emitting devices. This study developed a new type of solid-state luminescent CDs and demonstrated that these GCDs have great application potential for LFP detection. This study may also provide inspiration for other applications based on efficient solid-state fluorescence.
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Affiliation(s)
- Xuejing Wang
- College of Life Sciences, Shihezi University Shihezi 832003 China
| | - Yinyan Yuan
- College of Life Sciences, Shihezi University Shihezi 832003 China
| | - YiXiao Sun
- College of Life Sciences, Shihezi University Shihezi 832003 China
| | - Xue Liu
- College of Life Sciences, Shihezi University Shihezi 832003 China
| | - Mingze Ma
- College of Life Sciences, Shihezi University Shihezi 832003 China
| | - Renyin Zhang
- College of Life Sciences, Shihezi University Shihezi 832003 China
| | - Feng Shi
- College of Life Sciences, Shihezi University Shihezi 832003 China
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Construction of reversible enol-to-keto-to-enol tautomerization covalent organic polymer for sensitive, selective and multi-channel detection of iron (III). Anal Chim Acta 2022; 1232:340458. [DOI: 10.1016/j.aca.2022.340458] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Accepted: 09/27/2022] [Indexed: 11/17/2022]
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Jin Z, Li Q, Tang P, Li G, Liu L, Chen D, Wu J, Chai Z, Huang G, Chen X. Copper-doped carbon dots with enhanced Fenton reaction activity for rhodamine B degradation. NANOSCALE ADVANCES 2022; 4:3073-3082. [PMID: 36133526 PMCID: PMC9417171 DOI: 10.1039/d2na00269h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Accepted: 06/07/2022] [Indexed: 06/16/2023]
Abstract
The Fenton reaction has attracted extensive attention due to its potential to be a highly efficient and environmentally friendly wastewater treatment technology. Noble copper-doped carbon dots (CuCDs) are prepared through a simple one-step hydrothermal method with 3,4-dihydroxyhydrocinnamic acid, 2,2'-(ethylenedioxy)bis(ethylamine) and copper chloride, endowing the Fenton reaction with enhanced catalytic activity for rhodamine B (RhB) degradation. The effects of the concentration of CuCDs, temperature, pH, oxygen (O2), metal ions and polymers on the catalytic activity of CuCDs are investigated. It is worth noting that electron transfer happening on the surface of CuCDs plays a vital role in the RhB degradation process. As evidenced by radical scavenger experiments and electron spin resonance (ESR) studies, CuCDs significantly boost the formation of hydroxyl radicals (˙OH) and singlet oxygen (1O2), facilitating the Fenton reaction for RhB degradation. Due to the strong oxidation of ROS generated by the Fe2+ + H2O2 + CuCD system, RhB degradation may involve the cleavage of the chromophore aromatic ring and the de-ethylation process. Additionally, the toxicity of RhB degradation filtrates is assessed in vitro and in vivo. The as-prepared CuCDs may be promising catalytic agents for the enhancement of the Fenton reaction.
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Affiliation(s)
- Zhiru Jin
- School of Public Health, Guangxi Medical University Nanning 530021 China
- Department of Ultrasonic Medicine, First Affiliated Hospital of Guangxi Medical University Nanning 530021 China
| | - Qiuying Li
- School of Public Health, Guangxi Medical University Nanning 530021 China
| | - Peiduo Tang
- State Key Laboratory of Non-Food Biomass and Enzyme Technology, Guangxi Academy of Sciences Nanning 530007 China
| | - Ganfeng Li
- School of Public Health, Guangxi Medical University Nanning 530021 China
| | - Li Liu
- School of Public Health, Guangxi Medical University Nanning 530021 China
| | - Dong Chen
- State Key Laboratory of Non-Food Biomass and Enzyme Technology, Guangxi Academy of Sciences Nanning 530007 China
| | - Ji Wu
- Department of Ultrasonic Medicine, First Affiliated Hospital of Guangxi Medical University Nanning 530021 China
| | - Zhihui Chai
- State Key Laboratory of Non-Food Biomass and Enzyme Technology, Guangxi Academy of Sciences Nanning 530007 China
| | - Gang Huang
- State Key Laboratory of Non-Food Biomass and Enzyme Technology, Guangxi Academy of Sciences Nanning 530007 China
| | - Xing Chen
- School of Public Health, Guangxi Medical University Nanning 530021 China
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Ge G, Li L, Chen M, Wu X, Yang Y, Wang D, Zuo S, Zeng Z, Xiong W, Guo C. Green Synthesis of Nitrogen-Doped Carbon Dots from Fresh Tea Leaves for Selective Fe 3+ Ions Detection and Cellular Imaging. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:986. [PMID: 35335799 PMCID: PMC8955450 DOI: 10.3390/nano12060986] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Revised: 02/28/2022] [Accepted: 03/03/2022] [Indexed: 12/15/2022]
Abstract
In this research, we successfully developed a green, economical and effective one-step hydrothermal method for the synthesis of fluorescent nitrogen-doped carbon dots (N-CDs) by utilizing fresh tea leaves and urea as the carbon and nitrogen sources, respectively. The obtained N-CDs were characterized by TEM, XPS and FT-IR. We found that the N-CDs were near-spherical with an average size of about 2.32 nm, and contained abundant oxygen and nitrogen functional groups. The N-CDs exhibited bright blue fluorescence under ultraviolet illumination, with the maximum emission at 455 nm. Meanwhile, the as-prepared N-CDs could be selectively quenched by Fe3+ ions. The quenching of N-CDs is linearly correlated with the concentration of Fe3+ in the range of 0.1-400 μM with a low detection limit of 0.079 μM. Significantly, the N-CDs present excellent biocompatibility and high photostability. The results also depict that multicolor fluorescence is displayed under a fluorescence microscope and successfully applied for the detection of intracellular Fe3+. To sum up, the fluorescent N-CDs are expected to be a sensitive detection probe for Fe3+ in biological systems.
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Affiliation(s)
- Guili Ge
- Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Cancer Research Institute and School of Basic Medical Science, Central South University, Changsha 410008, China; (G.G.); (M.C.); (X.W.); (Y.Y.); (D.W.); (S.Z.); (Z.Z.)
| | - Lin Li
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China;
| | - Mingjian Chen
- Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Cancer Research Institute and School of Basic Medical Science, Central South University, Changsha 410008, China; (G.G.); (M.C.); (X.W.); (Y.Y.); (D.W.); (S.Z.); (Z.Z.)
| | - Xu Wu
- Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Cancer Research Institute and School of Basic Medical Science, Central South University, Changsha 410008, China; (G.G.); (M.C.); (X.W.); (Y.Y.); (D.W.); (S.Z.); (Z.Z.)
| | - Yuxin Yang
- Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Cancer Research Institute and School of Basic Medical Science, Central South University, Changsha 410008, China; (G.G.); (M.C.); (X.W.); (Y.Y.); (D.W.); (S.Z.); (Z.Z.)
| | - Dan Wang
- Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Cancer Research Institute and School of Basic Medical Science, Central South University, Changsha 410008, China; (G.G.); (M.C.); (X.W.); (Y.Y.); (D.W.); (S.Z.); (Z.Z.)
| | - Sicheng Zuo
- Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Cancer Research Institute and School of Basic Medical Science, Central South University, Changsha 410008, China; (G.G.); (M.C.); (X.W.); (Y.Y.); (D.W.); (S.Z.); (Z.Z.)
| | - Zhaoyang Zeng
- Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Cancer Research Institute and School of Basic Medical Science, Central South University, Changsha 410008, China; (G.G.); (M.C.); (X.W.); (Y.Y.); (D.W.); (S.Z.); (Z.Z.)
| | - Wei Xiong
- Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Cancer Research Institute and School of Basic Medical Science, Central South University, Changsha 410008, China; (G.G.); (M.C.); (X.W.); (Y.Y.); (D.W.); (S.Z.); (Z.Z.)
| | - Can Guo
- Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Cancer Research Institute and School of Basic Medical Science, Central South University, Changsha 410008, China; (G.G.); (M.C.); (X.W.); (Y.Y.); (D.W.); (S.Z.); (Z.Z.)
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Yang L, Zeng L, Tao Y, Wang D, Zhang K, Tian M, Xia Z, Gao D. Galli Gigerii Endothelium Corneum derived fluorescent carbon dots and their application as sensing platform for nitroimidazoles and cell imaging. Microchem J 2022. [DOI: 10.1016/j.microc.2021.107089] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Chen Y, Lin J, Zhang R, He S, Ding Z, Ding L. Electrochemiluminescence of water-dispersed nitrogen and sulfur doped carbon dots synthesized from amino acids. Analyst 2021; 146:5287-5293. [PMID: 34338251 DOI: 10.1039/d1an00991e] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
A facile one-pot hydrothermal approach for synthesizing water-dispersed nitrogen and sulfur doped carbon dots (NS-CDs) with high luminescence quantum yield was explored, using cysteine and tryptophan as precursors. The NS-CDs were characterized by means of FT-IR spectroscopy, XRD, TEM, etc. It was found that the absolute photoluminescence quantum yield (QY) of the NS-CDs determined with an integrating sphere can reach up to 73%, with an average decay time of 17.06 ns. Electrochemiluminescence (ECL) behaviors and mechanisms of the NS-CDs/K2S2O8 coreactant system were investigated. When the working electrode was modified with the prepared NS-CDs, the ECL efficiency of the NS-CDs with K2S2O8 was 24%, relative to Ru(bpy)3Cl2/K2S2O8. This work shows great potential for the NS-CDs to be used in bioanalytical applications.
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Affiliation(s)
- Yanhua Chen
- College of Chemistry, Jilin University, Changchun 130012, PR China.
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Wu Y, Cao L, Zan M, Hou Z, Ge M, Dong WF, Li L. Iron and nitrogen-co-doped carbon quantum dots for the sensitive and selective detection of hematin and ferric ions and cell imaging. Analyst 2021; 146:4954-4963. [PMID: 34259240 DOI: 10.1039/d1an00828e] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Iron, nitrogen-co-doped carbon quantum dots (Fe,N-CDs) were prepared via a simple one-step hydrothermal method. The quantum yield of fluorescence reached about 27.6% and the blue-emissive Fe,N-CDs had a mean size of 3.76 nm. The as-prepared carbon quantum dots showed good solubility, a high quantum yield, good biocompatibility, low cytotoxicity, and high photostability. Interestingly, the as-prepared Fe,N-CDs exhibited good selectivity and sensitivity toward both hematin and ferric ions, and the limit of detection for hematin and ferric ions was calculated to be about 0.024 μM and 0.64 μM, respectively. At the same time, Fe,N-CDs were used for imaging HeLa cells and showed that most Fe,N-CDs were detained in the lysosome. Thus, this fluorescent probe has potential application in the quantitative detection of hematin or Fe3+ in a complex environment and for determining Fe3+ at the cellular level.
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Affiliation(s)
- Yuqing Wu
- CAS Key Laboratory of Biomedical Diagnostics, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Science (CAS), Suzhou 215163, P. R. China.
| | - Lei Cao
- CAS Key Laboratory of Biomedical Diagnostics, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Science (CAS), Suzhou 215163, P. R. China. and School of Biomedical Engineering (Suzhou), Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230026, P. R. China
| | - Minghui Zan
- CAS Key Laboratory of Biomedical Diagnostics, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Science (CAS), Suzhou 215163, P. R. China. and State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, 100071, P. R. China
| | - Zheng Hou
- CAS Key Laboratory of Biomedical Diagnostics, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Science (CAS), Suzhou 215163, P. R. China.
| | - Mingfeng Ge
- CAS Key Laboratory of Biomedical Diagnostics, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Science (CAS), Suzhou 215163, P. R. China. and Guokeyigong Science and Technology Development Co., Ltd, Jinan 250103, China
| | - Wen-Fei Dong
- CAS Key Laboratory of Biomedical Diagnostics, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Science (CAS), Suzhou 215163, P. R. China.
| | - Li Li
- CAS Key Laboratory of Biomedical Diagnostics, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Science (CAS), Suzhou 215163, P. R. China.
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Wu D, Qu C, Wang J, Yang R, Qu L. Highly sensitive and selective fluorescence sensing and imaging of Fe 3+ based on a novel nitrogen-doped graphene quantum dots. LUMINESCENCE 2021; 36:1592-1599. [PMID: 33900668 DOI: 10.1002/bio.4062] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2021] [Revised: 04/21/2021] [Accepted: 04/22/2021] [Indexed: 11/10/2022]
Abstract
A novel nitrogen-doped graphene quantum dots (N-GQDs) with a green fluorescence emission was synthesized through microwave method using citric acid and semicarbazide hydrochloride as reactants. The as-synthesized N-GQDs exhibited good stability, excellent water solubility, and negligible cytotoxicity. Due to intermolecular charge transfer, ferric ion (Fe3+ ) has a strong quenching effect on the N-GQDs. Fluorescence quenching has a linear relationship with the Fe3+ concentration in the range 0.02-12 μM. The detection limit was 1.43 nM. What is more, it is worth mentioning that the obtained N-GQDs showed high selectivity and sensitivity towards Fe3+ . Under the optimum conditions, the addition of 10-fold copper ions and 100-fold other metal ions had no influence on the detection of Fe3+ (0.8 μM), which indicated a higher sensitivity compared with that of the reported methods. Due to their excellent properties, the obtained N-GQDs was successfully applied for sensing and imaging Fe3+ in water samples and HeLa cells.
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Affiliation(s)
- Dongming Wu
- Green Catalysis Center of Zhengzhou University, College of Chemistry, Henan Joint International Research Laboratory of Green Construction of Functional Molecules and Their Bioanalytical Applications, Zhengzhou Key Laboratory of Functional Nanomaterial and Medical Theranostic, Zhengzhou University, Zhengzhou, China
| | - Chaojie Qu
- Green Catalysis Center of Zhengzhou University, College of Chemistry, Henan Joint International Research Laboratory of Green Construction of Functional Molecules and Their Bioanalytical Applications, Zhengzhou Key Laboratory of Functional Nanomaterial and Medical Theranostic, Zhengzhou University, Zhengzhou, China
| | - Jizhong Wang
- Ministry of Agriculture and Rural Affairs, Hunan Division GRG Metrol & Test, Key Laboratory Southern Farmland Pollution Prevention & Control, Changsha, Hunan, China
| | - Ran Yang
- Green Catalysis Center of Zhengzhou University, College of Chemistry, Henan Joint International Research Laboratory of Green Construction of Functional Molecules and Their Bioanalytical Applications, Zhengzhou Key Laboratory of Functional Nanomaterial and Medical Theranostic, Zhengzhou University, Zhengzhou, China
| | - Lingbo Qu
- Green Catalysis Center of Zhengzhou University, College of Chemistry, Henan Joint International Research Laboratory of Green Construction of Functional Molecules and Their Bioanalytical Applications, Zhengzhou Key Laboratory of Functional Nanomaterial and Medical Theranostic, Zhengzhou University, Zhengzhou, China
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