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Shishkanova TV, Sinica A. Electrochemically deposited cobalt bis(dicarbollide) derivative and the detection of neuroblastoma markers on the electrode surface. J Electroanal Chem (Lausanne) 2022. [DOI: 10.1016/j.jelechem.2022.116674] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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2
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Chen M, Ao W, Bai J, Li P, Wei W, Pang S, Yang X. Dual-emission fluorescent nanoprobe based on Ag nanoclusters for sensitive detection of Cu(II). NANOTECHNOLOGY 2022; 33:345501. [PMID: 35576900 DOI: 10.1088/1361-6528/ac6ff1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Accepted: 05/15/2022] [Indexed: 06/15/2023]
Abstract
Noble metal nanoclusters have attracted much attention because of their excellent fluorescence properties. In this work, we demonstrated a dual-emission fluorescent nanocomposite based on silver nanoclusters. First, we synthesized positively charged His-AgNCs, which emits intense blue light, and then Ag nanoclusters with stable red emission were synthesized using DHLA as the ligand. Thus a dual-emission fluorescent nanoprobe was successfully obtained through electrostatic self-assembly, with the advantages of good water solubility and excellent stability. Based on the intensity ratio of the two emission peaks, the nanoprobe can be used for selective and sensitive detection of copper ions, and presents a good linear relationship within a certain concentration range. In addition, we also designed a polymer film, and our dual-emission nanoprobe was successfully loaded onto it, which means that the visual detection of copper ions is possible. This indicates that our dual-emission fluorescent nanoprobe has potential application prospects in environmental analysis, medical diagnosis, biological detection, etc.
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Affiliation(s)
- Ming Chen
- School of Chemical Engineering, Advanced Institute of Materials Science, Changchun University of Technology, Changchun, 130012, People's Republic of China
| | - Wei Ao
- School of Chemical Engineering, Advanced Institute of Materials Science, Changchun University of Technology, Changchun, 130012, People's Republic of China
| | - Jinna Bai
- School of Chemical Engineering, Advanced Institute of Materials Science, Changchun University of Technology, Changchun, 130012, People's Republic of China
| | - Pengjun Li
- School of Chemical Engineering, Advanced Institute of Materials Science, Changchun University of Technology, Changchun, 130012, People's Republic of China
| | - Wei Wei
- School of Chemical Engineering, Advanced Institute of Materials Science, Changchun University of Technology, Changchun, 130012, People's Republic of China
| | - Shujie Pang
- School of Chemical Engineering, Advanced Institute of Materials Science, Changchun University of Technology, Changchun, 130012, People's Republic of China
| | - Xudong Yang
- School of Chemical Engineering, Advanced Institute of Materials Science, Changchun University of Technology, Changchun, 130012, People's Republic of China
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3
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Water-dispersible chlorophyll-based fluorescent material derived from willow seeds for sensitive analysis of copper ions and biothiols in food and living cells. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2021.113664] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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4
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Li S, Liu D, Wu B, Sun H, Liu X, Zhang H, Ding N, Wu L. One-pot synthesis of a peroxidase-like nanozyme and its application in visual assay for tyrosinase activity. Talanta 2021; 239:123088. [PMID: 34838324 DOI: 10.1016/j.talanta.2021.123088] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Revised: 11/18/2021] [Accepted: 11/21/2021] [Indexed: 01/02/2023]
Abstract
Both single-atom nanozymes (SAzymes) and protein-template metal nanoparticles have attracted comprehensive attention in several respects owing to their excellent catalytic performance, green facile synthesis process, and robustness. Herein, the peroxidase-like activity of single-atom copper anchored on bovine hemoglobin-template gadolinium nanoparticles (Cu,Gd@BHbFITC NPs) were successfully synthesized and two sensitive turn-on fluorescence strategies for tyrosinase (TYR) activity sensing were proposed for the first time. For strategy Ⅰ, TYR sensing was carried out from 1.00 to 7.80 U/mL with the detection limit (LOD) of 0.20 U/mL based on the fluorescence resonance energy transfer (FRET) between the fluorescein isothiocyanate (FITC) and the in situ generated polydopamine dots (PDA-dots). For strategy Ⅱ, The LOD of TYR was 0.05 U/mL with the linear range of 0.40-19.70 U/mL based on the elimination of inner-filter effect (IEF) between FITC and the reaction product (RC) of phenol and 4-Aminoantipyrine (AAP). The smartphone-assisted sensing platform was applied to construct the on-site detection of TYR with both strategies. The developed probe possessed good selectivity and was successfully utilized to TYR detection in serum samples.
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Affiliation(s)
- Shuangqin Li
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China
| | - Di Liu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China
| | - Bingyan Wu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China
| | - Huipeng Sun
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China
| | - Xiaoyan Liu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China
| | - Haixia Zhang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China.
| | - Nana Ding
- College of Chemical Engineering, Northwest Minzu University, Lanzhou, Gansu, 730030, China
| | - Lan Wu
- College of Chemical Engineering, Northwest Minzu University, Lanzhou, Gansu, 730030, China.
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Mir IA, Kumar S, Bhat MA, Yuelin X, Wani AA, Zhu L. Core@shell quantum dots as a fluorescent probe for the detection of cholesterol and heavy metal ions in aqueous media. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.127090] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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6
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Weng S, Lv Y, Yu H, Zhu M. The Ligand-Exchange Reactions of Rod-Like Au 25-n M n (M=Au, Ag, Cu, Pd, Pt) Nanoclusters with Cysteine - A Density Functional Theory Study. Chemphyschem 2019; 20:1822-1829. [PMID: 31070285 DOI: 10.1002/cphc.201900439] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Revised: 05/08/2019] [Indexed: 11/06/2022]
Abstract
The atomic precision of ultrasmall noble-metal nanoclusters (NMNs) is fundamental for elucidating structure-property relationships and probing their practical applications. So far, the atomic structure of NMNs protected by organic ligands has been widely elucidated, whereas the precise atomic structure of NMNs protected by water-soluble ligands (such as peptides and nucleic acid), has been rarely reported. With the concept of "precision to precision", density functional theory (DFT) calculations were performed to probe the thermodynamic plausibility and inherent determinants for synthesizing atomically precise, water-soluble NMNs via the framework-maintained two-phase ligand-exchange method. A series of rod-like Au25-n Mn (M=Au, Ag, Cu, Pd, Pt) NMNs with the same framework but varied ligands and metal compositions was chosen as the modeling reactants, and cysteine was used as the modeling water-soluble ligand. It was found that the acidity of the reaction remarkably affects the thermodynamic facility of the ligand exchange reactions. Ligand effects (structural distortion and acidity) dominate the overall thermodynamic facility of the ligand-exchange reaction, while the number and type of doped metal atom(s) has little influence.
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Affiliation(s)
- Shiyin Weng
- Department of Chemistry and Centre for Atomic Engineering of Advanced Materials, Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, Anhui University, Hefei, Anhui, 230601, China
| | - Ying Lv
- Department of Chemistry and Centre for Atomic Engineering of Advanced Materials, Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, Anhui University, Hefei, Anhui, 230601, China
| | - Haizhu Yu
- Department of Chemistry and Centre for Atomic Engineering of Advanced Materials, Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, Anhui University, Hefei, Anhui, 230601, China.,Institute of Physical Science and Information Technology, Anhui University, Hefei, Anhui, 230601, China
| | - Manzhou Zhu
- Department of Chemistry and Centre for Atomic Engineering of Advanced Materials, Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, Anhui University, Hefei, Anhui, 230601, China.,Institute of Physical Science and Information Technology, Anhui University, Hefei, Anhui, 230601, China
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7
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Yang M, Wu XY, Wang HF, Young DJ, Ren ZG, Lang JP. Novel silver-phosphine coordination polymers incorporating a Wurster's blue - like radical cation with enhanced photoelectric properties. Chem Commun (Camb) 2019; 55:6599-6602. [PMID: 31119235 DOI: 10.1039/c9cc01711a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Tetraphosphine ligand dpppda reacts with AgNO3 to generate two 1D coordination polymers containing cubic and chair-like [Ag4(NO3)4] clusters. ESR spectroscopy supported by DFT calculations indicated the presence of dpppda˙+, a Wurster's blue - like radical cation formed by intramolecular ligand-to-metal charge transfer (LMCT). This LMCT results in higher AgI → Ag0 potentials and good photocurrent responses.
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Affiliation(s)
- Mei Yang
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, Jiangsu, P. R. China.
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8
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YANG SL, JIANG WN, TANG Y, XU L, GAO BH, XU HJ. Sensitive Fluorescent Assay for Determination of Cu2+ in Aqueous Solution Using Isorhamnetin-β-cyclodextrin Inclusion. CHINESE JOURNAL OF ANALYTICAL CHEMISTRY 2019. [DOI: 10.1016/s1872-2040(19)61167-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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9
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Removal of Ni(II) from fuel ethanol by PAMAM dendrimers/silica hybrid materials: Combined experimental and theoretical study. Chem Eng Res Des 2019. [DOI: 10.1016/j.cherd.2019.02.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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10
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Mian MM, Liu G, Yousaf B, Fu B, Ahmed R, Abbas Q, Munir MAM, Ruijia L. One-step synthesis of N-doped metal/biochar composite using NH 3-ambiance pyrolysis for efficient degradation and mineralization of Methylene Blue. J Environ Sci (China) 2019; 78:29-41. [PMID: 30665648 DOI: 10.1016/j.jes.2018.06.014] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2018] [Revised: 06/01/2018] [Accepted: 06/20/2018] [Indexed: 06/09/2023]
Abstract
A series of new biochar-supported composite based on the combination of biochar and metallic nanoparticles (NPs) were produced through single-step pyrolysis of FeCl3-Ti(OBu)4 laden agar biomass under NH3 environment. The physiochemical properties of composites were characterized thoroughly. It has found that heating temperature and N-doping through NH3-ambiance pyrolysis significantly influence the visible-light sensitivity and bandgap energy of composites. The catalytic activities of composites were measured by degradation of Methylene Blue (MB) in the presence or absence of H2O2 and visible-light irradiation. Our best catalyst (N-TiO2-Fe3O4-biochar) exhibits rapid and high MB removal competency (99.99%) via synergism of adsorption, photodegradation, and Fenton-like reaction. Continuous production of O2- and OH radicles performs MB degradation and mineralization, confirmed by scavenging experiments and degradation product analysis. The local trap state Ti3+, Fe3O4, and N-carbon of the catalyst acted as active sites. It has suggested that the Ti3+ and N-doped dense carbon layer improve charge separation and shuttle that prolonged photo-Fenton like reaction. Moreover, the catalyst is highly stable, collectible, and recyclable up to 5 cycles with high MB degradation efficiency. This work provides a new insight into the synthesis of highly visible-light sensitized biochar-supported photocatalyst through NH3-ambiance pyrolysis of NPs-laden biomass.
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Affiliation(s)
- Md Manik Mian
- CAS Key Laboratory of Crust-Mantle Materials and the Environments, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China; State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Shaanxi 710075, China
| | - Guijian Liu
- CAS Key Laboratory of Crust-Mantle Materials and the Environments, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China; State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Shaanxi 710075, China.
| | - Balal Yousaf
- CAS Key Laboratory of Crust-Mantle Materials and the Environments, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China; State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Shaanxi 710075, China
| | - Biao Fu
- CAS Key Laboratory of Crust-Mantle Materials and the Environments, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China; State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Shaanxi 710075, China
| | - Rafay Ahmed
- CAS Key Laboratory of Crust-Mantle Materials and the Environments, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China; State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Shaanxi 710075, China
| | - Qumber Abbas
- CAS Key Laboratory of Crust-Mantle Materials and the Environments, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China; State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Shaanxi 710075, China
| | - Mehr Ahmed Mujtaba Munir
- CAS Key Laboratory of Crust-Mantle Materials and the Environments, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China; State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Shaanxi 710075, China
| | - Liu Ruijia
- CAS Key Laboratory of Crust-Mantle Materials and the Environments, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China; State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Shaanxi 710075, China
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11
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Zeng L, Ma G, Xu H, Mu J, Li F, Gao X, Deng Z, Qu J, Huang P, Lin J. In Vivo Chemoselective Photoacoustic Imaging of Copper(II) in Plant and Animal Subjects. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2019; 15:e1803866. [PMID: 30645025 DOI: 10.1002/smll.201803866] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Revised: 12/18/2018] [Indexed: 05/27/2023]
Abstract
The detection of Cu2+ in living plants and animals is of great importance for environment monitoring and disease diagnosis. Here, a near-infrared (NIR) turn-on photoacoustic (PA) probe (denoted as LET-2) is developed for Cu2+ detection in living subjects, such as soybean sprouts and mice. The absorbance band of LET-2 shifts from 625 to 715 nm after the interaction with Cu2+ , thus producing strong PA signal output at 715 nm (PA715 ) as an indicator. The PA715 value is increased as a function of the concentration of Cu2+ (0 × 10-6 -20 × 10-6 m), with a calculated limit of detection of 10.8 × 10-9 m. More importantly, both in vitro and in vivo studies in soybean sprouts and mice indicate that the as-prepared LET-2 PA probe is highly sensitive and selective for Cu2+ detection. These findings provide a solution for in vivo detection of metal ions by using chemoselective PA probes.
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Affiliation(s)
- Leli Zeng
- Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, Carson International Cancer Center, Laboratory of Evolutionary Theranostics, School of Biomedical Engineering, Health Science Center, Shenzhen University, Shenzhen, 518060, China
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, China
| | - Gongcheng Ma
- Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, Carson International Cancer Center, Laboratory of Evolutionary Theranostics, School of Biomedical Engineering, Health Science Center, Shenzhen University, Shenzhen, 518060, China
| | - Han Xu
- Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, Carson International Cancer Center, Laboratory of Evolutionary Theranostics, School of Biomedical Engineering, Health Science Center, Shenzhen University, Shenzhen, 518060, China
| | - Jing Mu
- Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, Carson International Cancer Center, Laboratory of Evolutionary Theranostics, School of Biomedical Engineering, Health Science Center, Shenzhen University, Shenzhen, 518060, China
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, China
| | - Fan Li
- Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, Carson International Cancer Center, Laboratory of Evolutionary Theranostics, School of Biomedical Engineering, Health Science Center, Shenzhen University, Shenzhen, 518060, China
| | - Xiaoting Gao
- Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, Carson International Cancer Center, Laboratory of Evolutionary Theranostics, School of Biomedical Engineering, Health Science Center, Shenzhen University, Shenzhen, 518060, China
| | - Zhuoting Deng
- Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, Carson International Cancer Center, Laboratory of Evolutionary Theranostics, School of Biomedical Engineering, Health Science Center, Shenzhen University, Shenzhen, 518060, China
| | - Junle Qu
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, China
| | - Peng Huang
- Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, Carson International Cancer Center, Laboratory of Evolutionary Theranostics, School of Biomedical Engineering, Health Science Center, Shenzhen University, Shenzhen, 518060, China
| | - Jing Lin
- Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, Carson International Cancer Center, Laboratory of Evolutionary Theranostics, School of Biomedical Engineering, Health Science Center, Shenzhen University, Shenzhen, 518060, China
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12
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Ultra-low loading of Pd 5 nanoclusters on carbon nanotubes as bifunctional electrocatalysts for the oxygen reduction reaction and the ethanol oxidation reaction. J Colloid Interface Sci 2018; 538:699-708. [PMID: 30545584 DOI: 10.1016/j.jcis.2018.12.015] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Revised: 11/29/2018] [Accepted: 12/03/2018] [Indexed: 11/20/2022]
Abstract
How to reduce the usage of precious metals in electrocatalysts is a big challenge for the development of fuel cells. Metal nanoclusters (NCs) are highly desirable as active catalysts, but palladium nanoclusters (Pd NCs) have been less well developed than other metal clusters, such as gold, silver and copper, owing partly to the difficulties in size-controlled synthesis. Here, based on N, N-dimethylformamide (DMF)-mediation and ligand-exchange reaction, atomically precise Pd5(C12H25S)13 nanoclusters are successfully synthesized. By loading the as-prepared Pd5 nanoclusters on multiwalled carbon nanotubes (MWCNTs) and the following pyrolysis to remove the thiolate ligands, the surface-cleaned Pd5 clusters (Pd5 NCs/MWCNTs) can serve as efficient electrocatalysts for the oxygen reduction reaction (ORR) and the ethanol oxidation reaction (EOR). With ultra-low mass loading of Pd (2%), the Pd5 NCs showed higher mass and specific activities and better durability than the commercial Pd/C catalyst (5 wt%) for the ORR. At 0.8 V, the mass and specific activities of Pd5 NCs/MWCNTs are 5.70 and 4.53 times higher than the commercial Pd/C catalyst, respectively. As for the EOR, the Pd5 NCs/MWCNTs exhibited lower onset potential (0.39 V) and peak potential (0.81 V) than the commercial Pd/C catalyst (0.44 and 0.89 V). Electrochemical impedance spectroscopy (EIS) measurements indicated that for the EOR, the Pd5 nanoclusters have a much smaller charge transfer resistance (Rct) than the commercial Pd/C. The high-performance electrocatalytic properties of Pd5 NCs for the ORR and EOR could be ascribed to the relatively high surface area-to-volume ratio and high density of exposed surface atoms of the Pd5 nanoclusters.
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13
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Yang S, Jiang W, Tang Y, Xu L, Gao B, Xu H. Sensitive fluorescent assay for copper(ii) determination in aqueous solution using quercetin-cyclodextrin inclusion. RSC Adv 2018; 8:37828-37834. [PMID: 35558635 PMCID: PMC9089319 DOI: 10.1039/c8ra06754f] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2018] [Accepted: 10/22/2018] [Indexed: 12/14/2022] Open
Abstract
Environmentally friendly probe materials for detecting copper ions were studied in this research. Fluorescent emission of quercetin (Q) was observed in the buffer solution (pH = 7.40), and (2-hydroxypropyl)-β-cyclodextrin (CD) could enhance the fluorescence intensity of Q. The UV/Vis spectrum showed that the Q-CD system was formed. After adding copper ions into the Q-CD system, the fluorescent emission intensity of Q-CD system generated quenching, and other metal ions could not bring change, which meant the Q-CD system showed good selectivity to copper ions. The fluorescence titration spectra showed that the concentration of copper ions was inversely proportional to fluorescence intensity, and gave a good linear change in fluorescence emission intensity in response to the concentration of copper ions ranging from 5.0 × 10-8 to 8.3 × 10-6 mol L-1. The calibration curve of the relationship between the intensity and copper ions concentration was y = -9.24x + 844.51 (R 2 = 0.997). The detection limit of copper ions was measured to be 2.3 × 10-8 mol L-1. The probable mechanism was studied by UV/Vis spectrum and Job's plot method. The results indicated that Q-CD-Cu(ii) complex was formed and intramolecular charge transfer (ICT) took place. At last, the probe was successfully applied for determination of copper ions in water bodies, vegetables and fruits with good recovery. The study showed that Q-CD system could detect copper ions as a fluorescent probe with high selectivity, sensitivity and larger linearity range.
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Affiliation(s)
- Shilong Yang
- Advanced Analysis and Testing Center, Nanjing Forestry University Nanjing 210037 China
- Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University 210037 China
| | - Weina Jiang
- Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University 210037 China
- College of Chemical Engineering, Nanjing Forestry University 210037 China
| | - Ying Tang
- Advanced Analysis and Testing Center, Nanjing Forestry University Nanjing 210037 China
- College of Forestry, Nanjing Forestry University Nanjing 210037 China
| | - Li Xu
- Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University 210037 China
- College of Science, Nanjing Forestry University Nanjing 210037 China
| | - Buhong Gao
- Advanced Analysis and Testing Center, Nanjing Forestry University Nanjing 210037 China
| | - Haijun Xu
- College of Chemical Engineering, Nanjing Forestry University 210037 China
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14
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An P, Anumula R, Wu H, Han J, Luo Z. Charge transfer interactions of pyrazine with Ag 12 clusters towards precise SERS chemical mechanism. NANOSCALE 2018; 10:16787-16794. [PMID: 30160289 DOI: 10.1039/c8nr05253k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
We have synthesized Ag12 nanoclusters (NCs) with mercaptosuccinic acid (H2SMA) as the ligand. This cluster is found to be water-soluble and has satisfactory stability with [Ag12(HSMA)6Na6]2+, as determined by high-resolution mass spectrometry. Interestingly, it is noted that both the H2SMA ligand and Ag12 clusters do not display interference Raman signals, suggesting that this material is a good candidate as a substrate for surface-enhanced Raman spectroscopy (SERS). As a result, we observe enhanced Raman activity of pyrazine molecules adsorbed on Ag12 NCs along with a large red-shift up to ∼27 cm-1. To fully demonstrate the charge transfer interactions between pyrazine and Ag12 clusters, by utilizing first-principles calculations, we estimate polarizability tensor and conduct electronic natural population analysis (NPA), natural bond orbital (NBO) analysis, deformation density analysis (DDA) and charge decomposition analysis (CDA). In view of the minimized contribution from local surface plasmon resonance (LSPR), such a comprehensive study of metal NCs, which are free of Raman interference, provides a modelling method towards the long-debated chemical mechanism in SERS theory.
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Affiliation(s)
- Pan An
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China.
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15
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Chang YC, Lee CJ, Wang LW, Wang YH. Highly Uniform Resistive Switching Properties of Solution-Processed Silver-Embedded Gelatin Thin Film. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2018; 14:e1703888. [PMID: 29450966 DOI: 10.1002/smll.201703888] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Revised: 12/14/2017] [Indexed: 06/08/2023]
Abstract
The silver-embedded gelatin (AgG) thin film produced by the solution method of metal salts dissolved in gelatin is presented. Its simple fabrication method ensures the uniform distribution of Ag dots. Memory devices based on AgG exhibit good device performance, such as the ON/OFF ratio in excess of 105 and the coefficient of variation in less of 50%. To further investigate the position of filament formation and the role of each element, current sensing atomic force microscopy (CSAFM) analysis as well as elemental line profiles across the two different conditions in the LRS and HRS are analyzed. The conductive and nonconductive regions in the current map of the CSAFM image show that the conductive filaments occur in the AgG layer around Ag dots. The migration of oxygen ions and the redox reaction of carbon are demonstrated to be the driving mechanism for the resistive switching of AgG memory devices. The results show that dissolving metal salts in gelatin is an effective way to achieve high-performance organic-electronic applications.
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Affiliation(s)
- Yu-Chi Chang
- Institute of Microelectronics, Department of Electrical Engineering, National Cheng-Kung University, No. 1, University Road, Tainan City, 701, Taiwan (R.O.C.)
| | - Cheng-Jung Lee
- Institute of Microelectronics, Department of Electrical Engineering, National Cheng-Kung University, No. 1, University Road, Tainan City, 701, Taiwan (R.O.C.)
| | - Li-Wen Wang
- Institute of Microelectronics, Department of Electrical Engineering, National Cheng-Kung University, No. 1, University Road, Tainan City, 701, Taiwan (R.O.C.)
| | - Yeong-Her Wang
- Institute of Microelectronics, Department of Electrical Engineering, National Cheng-Kung University, No. 1, University Road, Tainan City, 701, Taiwan (R.O.C.)
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Zeng CH, Wu H, Luo Z, Yao J. Weak interactions cause selective cocrystal formation of lanthanide nitrates and tetra-2-pyridinylpyrazine. CrystEngComm 2018. [DOI: 10.1039/c7ce02098h] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Two series of cocrystals Ln(NO3)5·H2TPPZ are synthesized enlightening the lanthanide contraction effect and weak hydrogen bonding interactions in determining the selective cocrystallization, stability and energy transfer for luminescence.
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Affiliation(s)
- Cheng-Hui Zeng
- Beijing National Laboratory for Molecular Sciences (BNLMS)
- CAS Key Laboratory of Photochemistry
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species
- Institute of Chemistry
- Chinese Academy of Sciences
| | - Haiming Wu
- Beijing National Laboratory for Molecular Sciences (BNLMS)
- CAS Key Laboratory of Photochemistry
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species
- Institute of Chemistry
- Chinese Academy of Sciences
| | - Zhixun Luo
- Beijing National Laboratory for Molecular Sciences (BNLMS)
- CAS Key Laboratory of Photochemistry
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species
- Institute of Chemistry
- Chinese Academy of Sciences
| | - Jiannian Yao
- Beijing National Laboratory for Molecular Sciences (BNLMS)
- CAS Key Laboratory of Photochemistry
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species
- Institute of Chemistry
- Chinese Academy of Sciences
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