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Özge Alaş Çolak M, Güngör A, Akturk MB, Erdem E, Genç R. Unlocking the full potential of citric acid-synthesized carbon dots as a supercapacitor electrode material via surface functionalization. NANOSCALE 2024; 16:719-733. [PMID: 38086662 DOI: 10.1039/d3nr04893d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2024]
Abstract
This research paper investigates the effect of functionalizing the surfaces of citric acid-synthesized carbon dots (CDs) with hyperbranched bis(methylol)propionic acid (bis-MPA) polyester hydroxyl polymers (HBPs) on their performance as electrode materials in a supercapacitor. Two types of HBPs with 16 and 64 peripheral hydroxyl groups were used to functionalize the CDs' oxygen-enriched surface. Here, CDs were used as electrode materials for the first time in symmetric supercapacitors without a composite material, and how surface modification affects the capacitance performance of CDs was investigated. Our results showed that the functionalization of green-emitting CDs with HBP resulted in the successful passivation of surface defects, which improved their stability and prevented further oxidation. The CDs with HBP passivation exhibited excellent electrochemical performance, with a high specific capacitance of 32.08 F g-1 at 0.1 A g-1 and good rate capability, indicating a faster ion transport rate at high current densities. Experimental EPR spectra of functionalized and non-functionalized CDs reveal distinct changes in g-factor values and line widths, confirming the impact of dangling bonds and spin-orbit interactions. The observed broader linewidth indicates a wider range of electron spin resonances due to energy-level splitting induced by spin-orbit coupling. The excellent electrochemical performance of CDs with HBP passivation can be attributed to the presence of oxygen-containing surface functional groups such as hydroxyl and carboxyl groups on their surfaces, which enhance the conductivity and charge transfer reactions. These results suggest that functionalization with polar HBPs is a promising strategy to enhance the electrochemical performance of CDs in supercapacitor applications.
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Affiliation(s)
- Melis Özge Alaş Çolak
- Sabanci University, Nanotechnology Research and Application Centre, TR-34956, Istanbul, Turkey.
| | - Ahmet Güngör
- Faculty of Engineering and Natural Sciences, Sabanci University, TR-34956, Istanbul, Turkey.
| | - Merve Buldu Akturk
- Faculty of Engineering and Natural Sciences, Sabanci University, TR-34956, Istanbul, Turkey.
| | - Emre Erdem
- Faculty of Engineering and Natural Sciences, Sabanci University, TR-34956, Istanbul, Turkey.
- Sabanci University Integrated Manufacturing Technologies Research and Application Center and Composite Technologies Center of Excellence, Teknopark Istanbul, Pendik, 34906, Istanbul, Turkey
- Sabanci University Center of Excellence for Functional Surfaces and Interfaces for Nano-Diagnostics (EFSUN), Orhanli, 34956 Tuzla, Istanbul, Turkey
| | - Rükan Genç
- Sabanci University, Nanotechnology Research and Application Centre, TR-34956, Istanbul, Turkey.
- Department of Chemical Engineering, Engineering Faculty, Mersin University, TR-33343, Mersin, Turkey
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Munusamy S, Mandlimath TR, Swetha P, Al-Sehemi AG, Pannipara M, Koppala S, Paramasivam S, Boonyuen S, Pothu R, Boddula R. Nitrogen-doped carbon dots: Recent developments in its fluorescent sensor applications. ENVIRONMENTAL RESEARCH 2023; 231:116046. [PMID: 37150390 DOI: 10.1016/j.envres.2023.116046] [Citation(s) in RCA: 16] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 04/16/2023] [Accepted: 05/02/2023] [Indexed: 05/09/2023]
Abstract
Doped carbon dots have attracted great attention from researchers across disciplines because of their unique characteristics, such as their low toxicity, physiochemical stability, photostability, and outstanding biocompatibility. Nitrogen is one of the most commonly used elements for doping because of its sizeable atomic radius, strong electronegativity, abundance, and availability of electrons. This distinguishes them from other atoms and allows them to perform distinctive roles in various applications. Here, we have reviewed the most current breakthroughs in nitrogen-doped CDs (N-CDs) for fluorescent sensor applications in the last five years. The first section of the article addresses several synthetic and sustainable ways of making N-CDs. Next, we briefly reviewed the fluorescent features of N-CDs and their sensing mechanism. Furthermore, we have thoroughly reviewed their fluorescent sensor applications as sensors for cations, anions, small molecules, enzymes, antibiotics, pathogens, explosives, and pesticides. Finally, we have discussed the N-CDs' potential future as primary research and how that may be used. We hope that this study will contribute to a better understanding of the principles of N-CDs and the sensory applications that they can serve.
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Affiliation(s)
- Sathishkumar Munusamy
- Department of Chemistry, Faculty of Science, Chulalongkorn University, Phayathai Road, Angkok, 10330, Pathumwan, Thailand.
| | - Triveni Rajashekhar Mandlimath
- Department of Chemistry, School of Advanced Sciences, VIT-AP University, G-30, Inavolu, Besides AP Secretariat Amaravati, Andhra Pradesh, India
| | - Puchakayala Swetha
- Department of Chemistry, Oakland University, Rochester, MI, 48309, United States
| | | | | | - Sivasankar Koppala
- Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences (SIMATS), Chennai, 602105, Tamil Nadu, India
| | - Shanmugam Paramasivam
- Department of Chemistry, Faculty of Science and Technology, Thammasat University, Bangkok, 12120, Pathumthani, Thailand
| | - Supakorn Boonyuen
- Department of Chemistry, Faculty of Science and Technology, Thammasat University, Bangkok, 12120, Pathumthani, Thailand
| | - Ramyakrishna Pothu
- College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, PR China
| | - Rajender Boddula
- Center for Advanced Materials (CAM), Qatar University Doha, 2713, Qatar.
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Yuan X, Yan S, Wei C, Zhang Y, Su Y, Lv Y. Strong enhancement of the chemiluminescence of cerium (IV)-Na2S system by mono-dispersed N-CDs generated in situ. Microchem J 2023. [DOI: 10.1016/j.microc.2023.108560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
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Picomolar Detection of Lead Ions (Pb 2+) by Functionally Modified Fluorescent Carbon Quantum Dots from Watermelon Juice and Their Imaging in Cancer Cells. J Imaging 2023; 9:jimaging9010019. [PMID: 36662117 PMCID: PMC9865117 DOI: 10.3390/jimaging9010019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2022] [Revised: 01/06/2023] [Accepted: 01/10/2023] [Indexed: 01/18/2023] Open
Abstract
Water contamination due to the presence of lead is one of the leading causes of environmental and health hazards because of poor soil and groundwater waste management. Herein we report the synthesis of functionally modified luminescent carbon quantum dots (CQDs) obtained from watermelon juice as potential nanomaterials for the detection of toxic Pb2+ ions in polluted water and cancer cells. By introducing surface passivating ligands such as ethanolamine (EA) and ethylenediamine (ED) in watermelon juice, watermelon-ethanolamine (WMEA)-CQDs and watermelon-ethylenediamine (WMED)-CQDs exhibited a remarkable ~10-fold and ~6-fold increase in fluorescence intensity with respect to non-doped WM-CQDs. The relative fluorescence quantum yields of WMEA-CQDs and WMED-CQDs were found to be 8% and 7%, respectively, in an aqueous medium. Among various functionally-modified CQDs, only WMED-CQDs showed high selectivity towards Pb2+ ions with a remarkably good limit of detection (LoD) of 190 pM, which is less than that of the permissible limit (72 nM) in drinking water. The functionally altered WMED-CQDs detected Pb2+ metal ions in polluted water and in a human cervical cancer cell line (HeLa), thus advocating new vistas for eco-friendly nanomaterials for their use as diagnostic tools in the environment and biomedical research areas.
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Jacinth Gracia KD, Thavamani SS, Amaladhas TP, Devanesan S, Ahmed M, Kannan MM. Valorisation of bio-derived fluorescent carbon dots for metal sensing, DNA binding and bioimaging. CHEMOSPHERE 2022; 298:134128. [PMID: 35276110 DOI: 10.1016/j.chemosphere.2022.134128] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 02/10/2022] [Accepted: 02/24/2022] [Indexed: 06/14/2023]
Abstract
Carbon dots are quasi-spherical and zero dimensional nanomaterials with unique optical and electronic properties. In this work, a facile and sustainable strategy was employed to synthesise nitrogen doped carbon dots from Terminalia chebula via hydrothermal treatment with a quantum yield of 19.9%. The structural and optical properties of nitrogen doped carbon dots (N-CDs) were studied by UV-Visible absorption and fluorescence spectroscopy. The surface functional groups, average particle size and elemental analysis were assessed with the help of Fourier Transform Infra Red spectroscopy, High Resolution Transmission Electron Microscopy and Energy Dispersive X-ray analysis respectively. The N-CDs exhibited excitation dependent emission upon irradiation with UV light, pH stability over neutral range and excellent photostability. The average particle size of the synthesised N-CDs was found to be 3.56 nm. The fluorescence intensity of the N-CDs quenched linearly with increase in concentration of Fe3+ ions. The limit of detection (LOD) of N-CDs with Fe3+ ions was calculated to be 4.5 nM using Stern-Volmer plot. The fluorescence was restored by addition of EDTA to Fe3+ coordinated N-CD system. Further, the synthesised N-CDs interacted with ct-DNA through intercalative mode and the binding constant calculated using the Benesi Hildebrand plot was 1.78 × 108 mg/mL. The cytotoxicity of N-CDs was evaluated using MTT assay. The excellent biocompatible and less toxic nature of N-CDs was extrapolated to serve as fluorescent probes for imaging E.coli and SKMEL cells. From the results of this work, it is evident that the synthesised N-CDs can be used to develop efficient fluorescent metal sensors. The fluorescent property of N-CDs enables it to find extension as a potential curative drug, an efficient patterning agent and an effective biomarker to image biological cells causing no damage to normal cells.
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Affiliation(s)
- Kirubaharan Daphne Jacinth Gracia
- Post Graduate and Research Department of Chemistry, V.O. Chidambaram College (Affiliated to Manonmaniam Sundaranar University, Tirunelveli), Tuticorin, 628008, Tamil Nadu, India
| | - Seth Sheeba Thavamani
- Post Graduate and Research Department of Chemistry, V.O. Chidambaram College (Affiliated to Manonmaniam Sundaranar University, Tirunelveli), Tuticorin, 628008, Tamil Nadu, India.
| | - Thomas Peter Amaladhas
- Post Graduate and Research Department of Chemistry, V.O. Chidambaram College (Affiliated to Manonmaniam Sundaranar University, Tirunelveli), Tuticorin, 628008, Tamil Nadu, India.
| | - Sandhanasamy Devanesan
- Department of Physics and Astronomy, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Mukhtar Ahmed
- Department of Zoology, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Maruthamuthu Murali Kannan
- Division of Pharmacoengineering and Molecular Pharmaceutics, Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, NC, USA
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Lin YS, Yang ZY, Anand A, Huang CC, Chang HT. Carbon dots with polarity-tunable characteristics for the selective detection of sodium copper chlorophyllin and copper ions. Anal Chim Acta 2022; 1191:339311. [PMID: 35033242 DOI: 10.1016/j.aca.2021.339311] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2021] [Accepted: 11/18/2021] [Indexed: 11/28/2022]
Abstract
Compared to water-soluble carbon dots (CDs) the properties and applications of hydrophobic CDs are rarely addressed. In this study, a one-pot, simple chemical oxidation approach has been applied to synthesize hydrophobic carbon dots (TO-CDs) at room temperature from triolein (TO) in concentrated sulfuric acid solution. Sodium copper chlorophyllin (SCC) quenches the fluorescence of TO-CDs by a photoinduced electron transfer process. Upon excitation at 400 nm, the fluorescence intensity of TO-CDs probe at 500 nm shows a linear response against the SCC concentration ranging from 1.0 to 10 μM, with a limit of detection (LOD) of 0.61 μM. Quantitation of SCC in flavored drinks shows percentage recovery (%R) vaues of 98-103% and relative standard deviation (RSD) values less than 6.5%. The hydrophobic TO-CDs can be converted into hydrophilic TO-CDs through hydrolysis in NaOH solution. The presence of sulfonyl groups on the hydrophilic TO-CDs enhances the coordination ability of the CDs toward Cu2+ ions, leading to fluorescence quenching which allows for the detection of Cu2+ ions with LOD of 0.21 μM and a linear range of 0.5-10 μM. The hydrophilic TO-CD probe possesses high selectivity toward Cu2+ ions (tolerance at least ten-fold comparative to other metal ions). The assay has been validated with the analysis of spiked soil samples, with %R values of Cu concentration of 97.8-99.0% and RSDs below 2.0%. The surface tunable CD probes demonstrate their potential for the rapid screening of Cu2+ ions in environmental samples and SCC in foods.
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Affiliation(s)
- Yu-Syuan Lin
- Department of Chemistry, National Taiwan University, Taipei, 10617, Taiwan
| | - Zong-Yu Yang
- Department of Chemistry, National Taiwan University, Taipei, 10617, Taiwan
| | - Anisha Anand
- Department of Bioscience and Biotechnology, National Taiwan Ocean University, Keelung, 20224, Taiwan
| | - Chih-Ching Huang
- Department of Bioscience and Biotechnology, National Taiwan Ocean University, Keelung, 20224, Taiwan; Center of Excellence for the Oceans, National Taiwan Ocean University, Keelung, 20224, Taiwan; School of Pharmacy, College of Pharmacy, Kaohsiung Medical University, Kaohsiung, 80708, Taiwan.
| | - Huan-Tsung Chang
- Department of Chemistry, National Taiwan University, Taipei, 10617, Taiwan.
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Havrdová M, Urbančič I, Tománková KB, Malina L, Poláková K, Štrancar J, Bourlinos AB. Intracellular Trafficking of Cationic Carbon Dots in Cancer Cell Lines MCF-7 and HeLa—Time Lapse Microscopy, Concentration-Dependent Uptake, Viability, DNA Damage, and Cell Cycle Profile. Int J Mol Sci 2022; 23:ijms23031077. [PMID: 35162996 PMCID: PMC8835431 DOI: 10.3390/ijms23031077] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Revised: 01/07/2022] [Accepted: 01/14/2022] [Indexed: 02/04/2023] Open
Abstract
Fluorescent carbon dots (CDs) are potential tools for the labeling of cells with many advantages such as photostability, multicolor emission, small size, rapid uptake, biocompatibility, and easy preparation. Affinity towards organelles can be influenced by the surface properties of CDs which affect the interaction with the cell and cytoplasmic distribution. Organelle targeting by carbon dots is promising for anticancer treatment; thus, intracellular trafficking and cytotoxicity of cationic CDs was investigated. Based on our previous study, we used quaternized carbon dots (QCDs) for treatment and monitoring the behavior of two human cancer cell MCF-7 and HeLa lines. We found similarities between human cancer cells and mouse fibroblasts in the case of QCDs uptake. Time lapse microscopy of QCDs-labeled MCF-7 cells showed that cells are dying during the first two hours, faster at lower doses than at higher ones. QCDs at a concentration of 100 µg/mL entered into the nucleus before cellular death; however, at a dose of 200 µg/mL, blebbing of the cellular membrane occurred, with a subsequent penetration of QCDs into the nuclear area. In the case of HeLa cells, the dose-depended effect did not happen; however, the labeled cells were also dying in mitosis and genotoxicity occurred nearly at all doses. Moreover, contrasted intracellular compartments, probably mitochondria, were obvious after 24 h incubation with 100 µg/mL of QCDs. The levels of reactive oxygen species (ROS) slightly increased after 24 h, depending on the concentration, thus the genotoxicity was likely evoked by the nanomaterial. A decrease in viability did not reach IC 50 as the DNA damage was probably partly repaired in the prolonged G0/G1 phase of the cell cycle. Thus, the defects in the G2/M phase may have allowed a damaged cell to enter mitosis and undergo apoptosis. The anticancer effect in both cell lines was manifested mainly through genotoxicity.
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Affiliation(s)
- Markéta Havrdová
- Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute (CATRIN), Palacký University Olomouc, Křížkovského 511/8, 779 00 Olomouc, Czech Republic;
- Correspondence: ; Tel.: +420-585634384
| | - Iztok Urbančič
- Laboratory of Biophysics, Condensed Matter Physics Department, Jožef Stefan Institute, Jamova Cesta 39, 1000 Ljubljana, Slovenia; (I.U.); (J.Š.)
| | - Kateřina Bartoň Tománková
- Department of Medical Biophysics, Faculty of Medicine and Dentistry, Institute of Translational Medicine, Palacký University in Olomouc, Hněvotínská 3, 775 15 Olomouc, Czech Republic; (K.B.T.); (L.M.)
| | - Lukáš Malina
- Department of Medical Biophysics, Faculty of Medicine and Dentistry, Institute of Translational Medicine, Palacký University in Olomouc, Hněvotínská 3, 775 15 Olomouc, Czech Republic; (K.B.T.); (L.M.)
| | - Kateřina Poláková
- Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute (CATRIN), Palacký University Olomouc, Křížkovského 511/8, 779 00 Olomouc, Czech Republic;
| | - Janez Štrancar
- Laboratory of Biophysics, Condensed Matter Physics Department, Jožef Stefan Institute, Jamova Cesta 39, 1000 Ljubljana, Slovenia; (I.U.); (J.Š.)
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Son MH, Park SW, Jung YK. Antioxidant and anti-aging carbon quantum dots using tannic acid. NANOTECHNOLOGY 2021; 32:415102. [PMID: 34297003 DOI: 10.1088/1361-6528/ac027b] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Accepted: 05/18/2021] [Indexed: 06/13/2023]
Abstract
Overexpression of collagenase, elastase, and tyrosinase is caused by external factors such as ultraviolet (UV) radiation and stress, resulting in wrinkle formation and freckles through the loss of skin elasticity and skin pigmentation. In this study, we developed novel carbon quantum dots (CQDs) with antioxidant and anti-aging properties using tannic acid as a carbon source through a simple microwave-assisted pyrolysis method. The synthesized tannic acid-derived CQDs (T-CQDs) showed bright blue fluorescence (QY = 28.2 ± 4.0%), exhibiting maximum emission at 430 nm under 350 nm excitation. Even though small amount of the T-CQDs (3μg ml-1) was used, they exhibited excellent free radical scavenging ability (82.8 ± 4.3%). Also, the T-CQDs (10μg ml-1) revealed remarkable inhibitory activity against skin aging-related collagenase (77.6 ± 4.8%), elastase (52.6 ± 1.0%), and tyrosinase (44.2 ± 1.3%), demonstrating their antioxidant and anti-aging effects. Furthermore, their antioxidant and anti-aging properties were superior to those of tannic acid, L-ascorbic acid, and quercetin used as positive controls. Finally, the T-CQDs effectively suppressed UV-induced reactive oxygen species generation by 30% at the cellular levels and showed high cell viability (99.7 ± 0.8%) even at 500μg ml-1. These results demonstrate that the T-CQDs with superior antioxidant, anti-aging properties, and low cytotoxicity can be utilized as novel anti-aging materials in cosmetic and nanomedicine fields.
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Affiliation(s)
- Min Hyeong Son
- Department of Nanoscience and Engineering, Inje University, Gimhae, 50834, Republic of Korea
| | - Seok Won Park
- Department of Nanoscience and Engineering, Inje University, Gimhae, 50834, Republic of Korea
| | - Yun Kyung Jung
- Department of Nanoscience and Engineering, Inje University, Gimhae, 50834, Republic of Korea
- School of Biomedical Engineering, Inje University, Gimhae, 50834, Republic of Korea
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Guo X, Liu Y, Dong W, Hu Q, Li Y, Shuang S, Dong C, Cai L, Gong X. Azithromycin detection in cells and tablets by N,S co-doped carbon quantum dots. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 252:119506. [PMID: 33561684 DOI: 10.1016/j.saa.2021.119506] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Revised: 12/24/2020] [Accepted: 01/16/2021] [Indexed: 06/12/2023]
Abstract
Azithromycin (AZM)1 is one of the most widely used antibiotics. AZM abuse is easy to cause great harm to human body, so developing a rapid and sensitive method to detect AZM is of great importance. Herein, 3-aminothiophenol as only reaction precursor, nitrogen and sulfur co-doped carbon quantum dots (N,S-CQDs)2 were fabricated by one-step hydrothermal carbonization method. All characteristics demonstrate that N,S-CQDs possess good water solubility, high fluorescence stability and low cytotoxicity. Without being disturbed by amino acids and drugs, the most interesting finding is that AZM can efficiently quench the fluorescence of N,S-CQDs by a synergistic effect of electrostatic interaction and static quenching. A fluorescent probe for the detection of AZM was constructed with high selectivity and good sensitivity, achieving two linear ranges of 2.5-32.3 μM and 37.2-110 μM and a limit of detection of 0.76 µM. The proposed fluorescent method was used for the detection of AZM in cells with fulfilling results. More importantly, the fluorescent probe was successfully used to the detection of AZM in tablets and human urine with recovery rate and relative standard deviations of 98.2-104.8% and 0.04-3.46%, respectively, which was confirmed by the standard method of HPLC-UV. This finding illustrates the usefulness and feasibility of N,S-CQDs as an effective fluorescent probe for the detection of AZM in tablets and human urine, which is helpful for supervising and guiding pharmacy.
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Affiliation(s)
- Xueqing Guo
- Institute of Environmental Science, and School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, PR China
| | - Yang Liu
- Institute of Environmental Science, and School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, PR China
| | - Wenjuan Dong
- Institute of Environmental Science, and School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, PR China
| | - Qin Hu
- College of Food Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225001, PR China
| | - Yong Li
- Institute of Environmental Science, and School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, PR China
| | - Shaomin Shuang
- Institute of Environmental Science, and School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, PR China
| | - Chuan Dong
- Institute of Environmental Science, and School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, PR China
| | - Lishuai Cai
- Institute of Environmental Science, and School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, PR China
| | - Xiaojuan Gong
- Institute of Environmental Science, and School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, PR China.
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Devi P, Jindal N, Kim KH, Thakur A. Nanostructures derived from expired drugs and their applications toward sensing, security ink, and bactericidal material. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 764:144260. [PMID: 33401040 DOI: 10.1016/j.scitotenv.2020.144260] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Revised: 11/27/2020] [Accepted: 11/28/2020] [Indexed: 06/12/2023]
Abstract
In this research, a facile and economical route is introduced for the transformation of pharmaceutical waste (i.e., expired medicines) into value-added fluorescent carbon quantum dots (pharmaceutically derived CQDs abbreviated as 'P-CQDs'). The synthesized P-CQDs were identified to have surface functionalities of -OH, C=O, and C=C with an average size of ~2-3 nm and a high quantum yield of 35.3%. The photoluminescence of P-CQDs recorded a maximum optical emission intensity at 2.8 eV (425 nm). The binding of Cu (II) ions by -COOH functionalities on the surface of P-CQDs led to its fluorescence quenching (turn-off) over a wide Cu (II) concentration range of 0.25-50 ppm. The P-CQDs exhibited the detection limit of 0.66 ppm (well below the WHO permissible limit of 2 ppm). The fluorescence intensity of the P-CQDs-Cu (II) complex was recovered from NaHCO3.Hence, their "off-on" behavior was also explored for security ink applications for information encryption and decryption. Moreover, the rich oxygenated groups on the surface of the P-CQDs were utilized for green synthesis of plasmonic Ag@P-CQDs nanostructures, which were also demonstrated to have enhanced potential as bactericidal materials (e.g., against both E. coli and S. aureus). The overall results of this study are demonstrated to help create new and diverse routes for converting expired drugs into value-added nanostructures.
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Affiliation(s)
- Pooja Devi
- CSIR-Central Scientific Instruments Organisation, Chandigarh 160030, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India.
| | - Neha Jindal
- CSIR-Central Scientific Instruments Organisation, Chandigarh 160030, India
| | - Ki-Hyun Kim
- Department of Civil and Environmental Engineering, Hanyang University, Seoul 04763, Republic of Korea.
| | - Anupma Thakur
- CSIR-Central Scientific Instruments Organisation, Chandigarh 160030, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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Ansari L, Hallaj S, Hallaj T, Amjadi M. Doped-carbon dots: Recent advances in their biosensing, bioimaging and therapy applications. Colloids Surf B Biointerfaces 2021; 203:111743. [PMID: 33872828 DOI: 10.1016/j.colsurfb.2021.111743] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 03/12/2021] [Accepted: 04/01/2021] [Indexed: 12/28/2022]
Abstract
As a fascinating class of fluorescent carbon dots (CDs), doped-CDs are now sparked intense research interest, particularly in the diverse fields of biomedical applications due to their unique advantages, including low toxicity, physicochemical, photostability, excellent biocompatibility, and so on. In this review, we have summarized the most recent developments in the literature regarding the employment of doped-CDs for pharmaceutical and medical applications, which are published over approximately the past five years. Accordingly, we discuss the toxicity and optical properties of these nanomaterials. Beyond the presentation of successful examples of the application of these multifunctional nanoparticles in photothermal therapy, photodynamic therapy, and antibacterial activity, we further highlight their application in the cellular labeling, dual imaging, and in vitro and in vivo bioimaging by use of fluorescent-, photoacoustic-, magnetic-, and computed tomography (CT)-imaging. The potency of doped-CDs was also described in the biosensing of ions, small molecules, and drugs in biological samples or inside the cells. Finally, the advantages, disadvantages, and common limitations of doped-CD technologies are reviewed, along with the future prospects in biomedical research. Therefore, this review provides a concise insight into the current developments and challenges in the field of doped-CDs, especially for biological and biomedical researchers.
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Affiliation(s)
- Legha Ansari
- Cellular and Molecular Research Center, Cellular and Molecular Medicine Institute, Urmia University of Medical Sciences, Urmia 5714783734, Iran
| | - Shahin Hallaj
- Cellular and Molecular Research Center, Cellular and Molecular Medicine Institute, Urmia University of Medical Sciences, Urmia 5714783734, Iran
| | - Tooba Hallaj
- Cellular and Molecular Research Center, Cellular and Molecular Medicine Institute, Urmia University of Medical Sciences, Urmia 5714783734, Iran.
| | - Mohammad Amjadi
- Department of Analytical Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz 5166616471, Iran
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Sajjadi M, Nasrollahzadeh M, Jaleh B, Soufi GJ, Iravani S. Carbon-based nanomaterials for targeted cancer nanotherapy: recent trends and future prospects. J Drug Target 2021; 29:716-741. [PMID: 33566719 DOI: 10.1080/1061186x.2021.1886301] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Carbon-based nanomaterials are becoming attractive materials due to their unique structural dimensions and promising mechanical, electrical, thermal, optical and chemical characteristics. Carbon nanotubes, graphene, graphene oxide, carbon and graphene quantum dots have numerous applications in diverse areas, including biosensing, drug/gene delivery, tissue engineering, imaging, regenerative medicine, diagnosis, and cancer therapy. Cancer remains one of the major health problems all over the world, and several therapeutic approaches are focussed on designing targeted anticancer drug delivery nanosystems by applying benign and less hazardous resources with high biocompatibility, ease of functionalization, remarkable targeted therapy issues, and low adverse effects. This review highlights the recent development on these carbon based-nanomaterials in the field of targeted cancer therapy and discusses their possible and promising diagnostic and therapeutic applications for the treatment of cancers.
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Affiliation(s)
- Mohaddeseh Sajjadi
- Department of Chemistry, Faculty of Science, University of Qom, Qom, Iran
| | | | - Babak Jaleh
- Department of Physics, Bu-Ali Sina University, Hamedan, Iran
| | | | - Siavash Iravani
- Faculty of Pharmacy and Pharmaceutical Sciences, Isfahan University of Medical Sciences, Isfahan, Iran
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13
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Mu Y, Zhuang Q, Huang S, Hu M, Wang Y, Ni Y. Adenine-stabilized carbon dots for highly sensitive and selective sensing of copper(II) ions and cell imaging. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 239:118531. [PMID: 32498027 DOI: 10.1016/j.saa.2020.118531] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2020] [Revised: 05/13/2020] [Accepted: 05/22/2020] [Indexed: 06/11/2023]
Abstract
Adenine-stabilized carbon dots (A-CDs) are shown to be a viable fluorescent probe for highly sensitive detection and imaging of Cu2+. The probe has a linear fluorometric response in the 1-700 nM concentration range and a 0.3 nM detection limit. The probe, with excitation/emission maxima at 380/435 nm, is highly selective for Cu2+ over other metal ions, anions, amino acids, and biomolecules. The fluorescence quenching mechanism of the A-CDs by Cu2+ is investigated using transmission electron microscopy images coupled with elemental mapping, X-ray photoelectron spectroscopy, X-ray-excited Auger electron spectroscopy, fluorescence lifetime, UV-visible spectroscopy, and cyclic voltammetry. The experimental results show that the fluorescence quenching is caused by the combination of Cu2+-coordination-induced aggregation of the A-CDs, the reduction of Cu2+ by the A-CDs, and the nonradiative photoinduced electron transfer process from the A-CDs to Cu2+ or metallic Cu. The high sensitivity and high selectivity of the sensor are ascribed to the chemical interactions between the A-CDs and Cu2+, the photophysical process between the A-CDs and Cu2+, and the high fluorescence quantum yield of the A-CDs (44.6%). The A-CDs have excellent water solubility, good stability to variation of pH values, high photostability, fast response time, and low cytotoxicity. They are successfully employed for intracellular imaging of Cu2+ in HepG2 cells and Cu2+ detection in the tap water samples.
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Affiliation(s)
- Yaxin Mu
- College of Chemistry, Nanchang University, Nanchang 330031, China
| | - Qianfen Zhuang
- College of Chemistry, Nanchang University, Nanchang 330031, China
| | - Saipeng Huang
- School of Chemical Engineering, Northwest University, X'ian 710069, China
| | - Mingyue Hu
- College of Chemistry, Nanchang University, Nanchang 330031, China
| | - Yong Wang
- College of Chemistry, Nanchang University, Nanchang 330031, China; Jiangxi Province Key Laboratory of Modern Analytical Science, Nanchang University, Nanchang 330031, China.
| | - Yongnian Ni
- College of Chemistry, Nanchang University, Nanchang 330031, China
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14
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Unnikrishnan B, Wu RS, Wei SC, Huang CC, Chang HT. Fluorescent Carbon Dots for Selective Labeling of Subcellular Organelles. ACS OMEGA 2020; 5:11248-11261. [PMID: 32478212 PMCID: PMC7254528 DOI: 10.1021/acsomega.9b04301] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Accepted: 04/24/2020] [Indexed: 05/05/2023]
Abstract
With the recent advancement in understanding and control of the structure and optical properties of fluorescent carbon dots (CDs), they have been shown to be valuable in biolabeling of bacteria, tumor cells, tissues, and organelles. Their extremely small size and tunable functional properties coupled with ultrastable fluorescence enable CDs to be used for easy and effective labeling of various organelles. In addition, CDs with advantages of easy preparation and functionalization with recognition elements and/or drugs have emerged as nanocarriers for organelle-targeted drug delivery. In this review, we mainly discuss the applications of fluorescent CDs for the labeling of organelles, including lysosome, nucleoli, nucleus, endoplasmic reticulum, and mitochondria. We highlight the importance of the surface properties (functional groups, hydrophobicity/hydrophilicity, charges, zwitterions) and the size of CDs for labeling. Several interesting examples are provided to highlight the potential and disadvantages of CDs for labeling organelles. Strategies for the preparation of CDs for specific labeling of organelles are suggested. With the edge in preparation of diverse CDs, their potential in labeling and drug delivery is highly expected.
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Affiliation(s)
- Binesh Unnikrishnan
- Department
of Bioscience and Biotechnology, National
Taiwan Ocean University, 2, Beining Road, Keelung 20224, Taiwan
| | - Ren-Siang Wu
- Department
of Chemistry, National Taiwan University, 1, Section 4, Roosevelt Road, Taipei 10617, Taiwan
| | - Shih-Chun Wei
- Department
of Chemistry, National Taiwan University, 1, Section 4, Roosevelt Road, Taipei 10617, Taiwan
| | - Chih-Ching Huang
- Department
of Bioscience and Biotechnology, National
Taiwan Ocean University, 2, Beining Road, Keelung 20224, Taiwan
- Center
of Excellence for the Oceans, National Taiwan
Ocean University, Keelung 20224, Taiwan
- School
of Pharmacy, College of Pharmacy, Kaohsiung
Medical University, Kaohsiung 80708, Taiwan
| | - Huan-Tsung Chang
- Department
of Chemistry, National Taiwan University, 1, Section 4, Roosevelt Road, Taipei 10617, Taiwan
- Department
of Chemistry, Chung Yuan Christian University, Chungli District, Taoyuan City 32023, Taiwan
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15
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Zhang Y, Zhang X, Shi Y, Sun C, Zhou N, Wen H. The Synthesis and Functional Study of Multicolor Nitrogen-Doped Carbon Dots for Live Cell Nuclear Imaging. Molecules 2020; 25:molecules25020306. [PMID: 31940913 PMCID: PMC7024153 DOI: 10.3390/molecules25020306] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2019] [Revised: 01/08/2020] [Accepted: 01/09/2020] [Indexed: 11/16/2022] Open
Abstract
The nitrogen-doped carbon dots (N-CQDs) were synthesized by citric acid as a raw material and propylene diamine as a passivation agent. Structure, optical properties and biocompatibility of N-CQDs were analyzed. It was found that the N-CQDs possessed concentration-dependent, multicolor photoluminescence and low toxicity. As demonstrated in the imaging of bioluminescence, by adjusting the concentration of N-CQDs, the cell imaging effect can be adjusted. The internalized N-CQDs were concentrated in the nucleus. A novel tool for studying the nuclear changes during the cell cycle was developed.
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Affiliation(s)
- Yanan Zhang
- Department of Physiology, Harbin Medical University, Harbin 150081, China;
| | - Xingwei Zhang
- Department of Chemistry, Northeast Agricultural University, Harbin 150025, China; (X.Z.); (Y.S.); (C.S.)
| | - Yanping Shi
- Department of Chemistry, Northeast Agricultural University, Harbin 150025, China; (X.Z.); (Y.S.); (C.S.)
| | - Chao Sun
- Department of Chemistry, Northeast Agricultural University, Harbin 150025, China; (X.Z.); (Y.S.); (C.S.)
| | - Nan Zhou
- Department of Chemistry, Northeast Agricultural University, Harbin 150025, China; (X.Z.); (Y.S.); (C.S.)
- Correspondence: (H.W.); (N.Z.); Tel.: +86-13766873464 (N.Z.)
| | - Haixia Wen
- Department of Physiology, Harbin Medical University, Harbin 150081, China;
- Correspondence: (H.W.); (N.Z.); Tel.: +86-13766873464 (N.Z.)
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16
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Wang Y, Yue Q, Hu Y, Liu C, Tao L, Zhang C. Synthesis of N-doped carbon dots and application in vanillin detection based on collisional quenching. RSC Adv 2019; 9:40222-40227. [PMID: 35542682 PMCID: PMC9076176 DOI: 10.1039/c9ra08352a] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2019] [Accepted: 11/13/2019] [Indexed: 11/21/2022] Open
Abstract
N-doped carbon dots (NCDs) exhibit bright blue emissions and have been used as viable fluorescent probes in the turn-off fluorometric assay for vanillin detection. NCDs were prepared from glucose and tyrosine using a facile and green synthesis process. The one-pot hydrothermal treatment was used without any strong acid or oxidant. The fluorescence of NCDs (with excitation/emission peaks at 323/416 nm, respectively) can be quenched by vanillin. The quenching mechanism belongs to the dynamic quenching mode due to the molecular collisions of the ground state of vanillin and the excited state of NCDs. This turn-off system could be utilized to quantify vanillin within a linear range of 0.43-264 μM. The limit of detection was 0.10 μM. Moreover, this approach was successfully applied toward the determination of vanillin in food samples.
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Affiliation(s)
- Yongping Wang
- Department of Chemistry, Liaocheng University Liaocheng 252059 China
| | - Qiaoli Yue
- Department of Chemistry, Liaocheng University Liaocheng 252059 China
| | - Yingying Hu
- Department of Chemistry, Liaocheng University Liaocheng 252059 China
| | - Chen Liu
- Department of Chemistry, Liaocheng University Liaocheng 252059 China
| | - Lixia Tao
- Department of Chemistry, Liaocheng University Liaocheng 252059 China
| | - Cong Zhang
- Department of Chemistry, Liaocheng University Liaocheng 252059 China
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17
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Wen Y, Jia Q, Nan F, Zheng X, Liu W, Wu J, Ren H, Ge J, Wang P. Pheophytin Derived Near-Infrared-Light Responsive Carbon Dot Assembly as a New Phototheranotic Agent for Bioimaging and Photodynamic Therapy. Chem Asian J 2019; 14:2162-2168. [PMID: 31037828 DOI: 10.1002/asia.201900416] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2019] [Revised: 04/22/2019] [Indexed: 11/10/2022]
Abstract
Carbon dots (CDs), a kind of phototheranostic agent with the capability of simultaneous bioimaging and phototherapy [i.e., photodynamic therapy (PDT) or photothermal therapy (PTT)], have received considerable attention because of their remarkable properties, including flexibility for surface modification, high biocompatibility, low toxicity and photo-induced activity for malignant tumor cells. Among numerous carbon sources, it has been found that natural biomass are good candidates for the preparation of CD phototheranostic agents. In this study, pheophytin, a type of Mg-free chlorophyll derivative and also a natural product with low toxicity, was used as a raw carbon source for the synthesis of CDs by using a microwave method. The obtained hydrophobic CDs exhibited a maximum near-infrared (NIR) emission peak at approximately 680 nm, and high singlet oxygen (1 O2 ) generation with a quantum yield of 0.62. The self-assembled CDs from the as-prepared CDs with DSPE-mPEG2000 retained efficient 1 O2 generation. The obtained carbon dot assembly was not only an efficient fluorescence (FL) imaging agent but also a smart PDT agent. Our studies indicated that the obtained hydrophilic CD assembly holds great potential as a new phototheranostic agent for cancer therapy. This work provides a new route for synthesis of CDs and proposes a readily available candidate for tumor treatment.
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Affiliation(s)
- Yongmei Wen
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials and City U-CAS Joint Laboratory of Functional Materials and Devices, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Zhongguancun east road 29#, Beijing, 100190, P. R. China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Qingyan Jia
- Shanxi Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Fuchun Nan
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials and City U-CAS Joint Laboratory of Functional Materials and Devices, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Zhongguancun east road 29#, Beijing, 100190, P. R. China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xiuli Zheng
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials and City U-CAS Joint Laboratory of Functional Materials and Devices, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Zhongguancun east road 29#, Beijing, 100190, P. R. China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Weimin Liu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials and City U-CAS Joint Laboratory of Functional Materials and Devices, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Zhongguancun east road 29#, Beijing, 100190, P. R. China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Jiasheng Wu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials and City U-CAS Joint Laboratory of Functional Materials and Devices, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Zhongguancun east road 29#, Beijing, 100190, P. R. China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Haohui Ren
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials and City U-CAS Joint Laboratory of Functional Materials and Devices, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Zhongguancun east road 29#, Beijing, 100190, P. R. China
| | - Jiechao Ge
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials and City U-CAS Joint Laboratory of Functional Materials and Devices, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Zhongguancun east road 29#, Beijing, 100190, P. R. China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Pengfei Wang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials and City U-CAS Joint Laboratory of Functional Materials and Devices, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Zhongguancun east road 29#, Beijing, 100190, P. R. China.,University of Chinese Academy of Sciences, Beijing, 100049, China
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18
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Ju B, Zhang T, Li S, Liu J, Zhang W, Li M, Zhang SXA. Fingerprint identification of copper ions with absorption and emission dual-mode responses by N,S co-doped red carbon dots. NEW J CHEM 2019. [DOI: 10.1039/c8nj04906h] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Highly selective and sensitive Cu2+-based sensors have been successfully developed by N,S co-doped red emissive carbon dots with absorption and emission dual-mode recognition strategies.
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Affiliation(s)
- Bo Ju
- State Key Laboratory of Supramolecular Structure and Materials
- College of Chemistry
- Jilin University
- Changchun 130012
- P. R. China
| | - Ting Zhang
- State Key Laboratory of Supramolecular Structure and Materials
- College of Chemistry
- Jilin University
- Changchun 130012
- P. R. China
| | - Song Li
- State Key Laboratory of Supramolecular Structure and Materials
- College of Chemistry
- Jilin University
- Changchun 130012
- P. R. China
| | - Jun Liu
- State Key Laboratory of Supramolecular Structure and Materials
- College of Chemistry
- Jilin University
- Changchun 130012
- P. R. China
| | - Weiran Zhang
- State Key Laboratory of Supramolecular Structure and Materials
- College of Chemistry
- Jilin University
- Changchun 130012
- P. R. China
| | - Minjie Li
- State Key Laboratory of Supramolecular Structure and Materials
- College of Chemistry
- Jilin University
- Changchun 130012
- P. R. China
| | - Sean Xiao-An Zhang
- State Key Laboratory of Supramolecular Structure and Materials
- College of Chemistry
- Jilin University
- Changchun 130012
- P. R. China
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19
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Wang B, Tan H, Zhang T, Duan W, Zhu Y. Hydrothermal synthesis of N-doped carbon dots from an ethanolamine–ionic liquid gel to construct label-free multifunctional fluorescent probes for Hg2+, Cu2+ and S2O32−. Analyst 2019; 144:3013-3022. [DOI: 10.1039/c9an00116f] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
N-Doped carbon dots were synthesized and used to construct multifunctional fluorescent probes for Hg2+, Cu2+ and S2O32−.
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Affiliation(s)
- Baogang Wang
- College of Chemistry and Chemical Engineering
- Southwest Petroleum University
- Chengdu 610500
- P. R. China
| | - Hui Tan
- College of Chemistry and Chemical Engineering
- Southwest Petroleum University
- Chengdu 610500
- P. R. China
| | - Tailiang Zhang
- College of Chemistry and Chemical Engineering
- Southwest Petroleum University
- Chengdu 610500
- P. R. China
| | - Wenmeng Duan
- College of Chemistry and Chemical Engineering
- Southwest Petroleum University
- Chengdu 610500
- P. R. China
| | - Yuanqiang Zhu
- College of Chemistry and Chemical Engineering
- Southwest Petroleum University
- Chengdu 610500
- P. R. China
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20
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Li Z, Su S, Yu L, Zheng Z, Wang X. Preparation of a photo- and thermo-responsive topological gel from anthracene-modified polyrotaxanes. SOFT MATTER 2018; 14:2767-2771. [PMID: 29589859 DOI: 10.1039/c8sm00376a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
A topological gel was formed from anthracene-modified polyrotaxanes (An-PRs) under UV irradiation, and the gel can turn back to a sol under thermal treatment due to the dimerization between the anthracene units and the dissociation of the formed dimer.
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Affiliation(s)
- Zhao Li
- School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China.
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21
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Huang Y, Deng X, Lang J, Liang X. Modulation of quantum dots and clearance of Helicobacter pylori with synergy of cell autophagy. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2018; 14:849-861. [PMID: 29309908 DOI: 10.1016/j.nano.2017.12.016] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2017] [Revised: 12/18/2017] [Accepted: 12/23/2017] [Indexed: 12/15/2022]
Abstract
Helicobacter pylori (Hp) is one type of Gram-negative pathogenic bacterium that colonizes and causes a wide range of gastric diseases. Once Hp penetrates into cells, the currently recognized triple or quadruple therapy often loses effectiveness. Recent evidence suggests that autophagy is closely associated with Hp infection, and can play an important role in the eradication of Hp. More importantly, certain types of quantum dots (QDs) can induce and modulate cellular autophagy, and can be developed into conjugates making QDs potential candidates as new anti-Hp agents.
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Affiliation(s)
- Yu Huang
- Guangxi University of Chinese Medicine, Nanning, Guangxi Zhuang Autonomous Region, PR China
| | - Xin Deng
- Ruikang Hospital Affiliated to Guangxi University of Chinese Medicine, Nanning, Guangxi Zhuang Autonomous Region, PR China.
| | - Jian Lang
- Guangxi University of Chinese Medicine, Nanning, Guangxi Zhuang Autonomous Region, PR China
| | - Xingqiu Liang
- Ruikang Hospital Affiliated to Guangxi University of Chinese Medicine, Nanning, Guangxi Zhuang Autonomous Region, PR China
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