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学者姓名：汪夏燕
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摘要 ：
NaCl has been successfully used as a template for the synthesis of 2D nanomaterials, but it is seldom used for the construction of flat small organic molecules. Herein, a simple, low-cost, and highly efficient synthesis of phenazines with planar main frames, such as 5-phenyl-5,14-dihydro-5,7,12,14-tetraazapentacene, in the presence of NaCl micro-crystal as a kind of molecular mold is described. The reactants were mixed with NaCl powder and heated to 320 degrees C for 5 min. Yields > 90% were readily achieved after a simple precipitation in water. The effectiveness of NaCl crystal as a mold with HCl was confirmed by comparison with common inorganic salts, SiO2, and gamma-Al(2)O(3 )with HCl together with combinations including NaNO3 + HNO3, Na2SO4 + H2SO4, NaH2PO4 + H3PO4, and NaH2PO4 + polyphosphoric acid. The mechanism was deduced with the aid of computer simulation, which confirms the stabilization of 5,14-dihydro-5,7,12,14-tetraazapentacene by the NaCl surface. DMSO solution of a product, 1,3-dihydro-imidazo[4,5-b]phenazin-2-one, showed enhanced fluorescence in H2O, and it was used as a fluorescent probe for pH and Hg2+. A full-color material was prepared by mixing precursors of epoxy resin and phenazines, and its fluorescent color could be adjusted by the ratio of phenazines.
关键词 ：
Hg2+ sensor Hg2+ sensor phenazine phenazine NaCl-enhanced synthesis NaCl-enhanced synthesis molecular mold molecular mold full-color fluorescence full-color fluorescence
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| GB/T 7714 | Bian, Lei , Ma, Jie , Ai, Jiebing et al. NaCl Micro-Crystal as a Molecular Mold for Enhanced Synthesis of Planar Phenazines and Their Applications on Chemosensing and a Full-Color Fluorescent Material [J]. | ACS APPLIED MATERIALS & INTERFACES , 2022 , 14 (34) : 39441-39450 . |
| MLA | Bian, Lei et al. "NaCl Micro-Crystal as a Molecular Mold for Enhanced Synthesis of Planar Phenazines and Their Applications on Chemosensing and a Full-Color Fluorescent Material" . | ACS APPLIED MATERIALS & INTERFACES 14 . 34 (2022) : 39441-39450 . |
| APA | Bian, Lei , Ma, Jie , Ai, Jiebing , Wang, Yan , Wang, Naiyu , Guo, Guangsheng et al. NaCl Micro-Crystal as a Molecular Mold for Enhanced Synthesis of Planar Phenazines and Their Applications on Chemosensing and a Full-Color Fluorescent Material . | ACS APPLIED MATERIALS & INTERFACES , 2022 , 14 (34) , 39441-39450 . |
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摘要 ：
Carbon dots (CDs) as the advancing fluorescent carbon nanomaterial have superior potential and prospective. However, the ambiguous photoluminescence (PL) mechanism and intricate structure-function relationship become the greatest hindrances in the development and applications of CDs. Herein, red emissive CDs were synthesized in high yield from o-phenylenediamine (oPD) and catechol (CAT). The PL mechanism of the CDs is considered as the molecular state fluorophores because 5,14-dihydroquinoxalino[2,3-b] phenazine (DHQP) is separated and exhibits the same PL properties and behavior as the CDs. These include the peak position and shape of the PL emission and PL excitation and the emission dependence on pH and solvent polarity. Both of them display close PL lifetime decays. Based on these, we deduce that DHQP is the fluorophore of the red emissive CDs and the PL mechanism of CDs is similar to DHQP. During the PL emission of CDs, the electron of the molecule state can transfer to CDs. The formation process of DHQP is further confirmed by the reaction intermediates (phthalazine, dimers) and oPD. These findings provide insights into the PL mechanism of this type of CDs and may guide the further development of tunable CDs for tailored properties.
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| GB/T 7714 | Li, Pengfei , Xue, Shanshan , Sun, Lu et al. Formation and fluorescent mechanism of red emissive carbon dots from o-phenylenediamine and catechol system [J]. | LIGHT-SCIENCE & APPLICATIONS , 2022 , 11 (1) . |
| MLA | Li, Pengfei et al. "Formation and fluorescent mechanism of red emissive carbon dots from o-phenylenediamine and catechol system" . | LIGHT-SCIENCE & APPLICATIONS 11 . 1 (2022) . |
| APA | Li, Pengfei , Xue, Shanshan , Sun, Lu , Zong, Xupeng , An, Li , Qu, Dan et al. Formation and fluorescent mechanism of red emissive carbon dots from o-phenylenediamine and catechol system . | LIGHT-SCIENCE & APPLICATIONS , 2022 , 11 (1) . |
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摘要 ：
While single-cell mass spectrometry can reveal cellular heterogeneity and the molecular mechanisms of intracellular biochemical reactions, its application is limited by the insufficient detection sensitivity resulting from matrix interference and sample dilution. Herein, we propose an intact living-cell electrolaunching ionization mass spectrometry (ILCEI-MS) method. A capillary emitter with a narrow-bore, constant-inner-diameter ensures that the entire living cell enters the MS ion-transfer tube. Inlet ionization improves sample utilization, and no solvent is required, preventing sample dilution and matrix interference. Based on these features, the detection sensitivity is greatly improved, and the average signal-to-noise (S/N) ratio is about 20 : 1 of single-cell peaks in the TIC of ILCEI-MS. A high detection throughput of 51 cells per min was achieved by ILCEI-MS for the single-cell metabolic profiling of multiple cell lines, and 368 cellular metabolites were identified. Further, more than 4000 primary single cells digested from the fresh multi-organ tissues of mice were detected by ILCEI-MS, demonstrating its applicability and reliability.
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| GB/T 7714 | Shao, Yunlong , Zhou, Yingyan , Liu, Yuanxing et al. Intact living-cell electrolaunching ionization mass spectrometry for single-cell metabolomics [J]. | CHEMICAL SCIENCE , 2022 , 13 (27) : 8065-8073 . |
| MLA | Shao, Yunlong et al. "Intact living-cell electrolaunching ionization mass spectrometry for single-cell metabolomics" . | CHEMICAL SCIENCE 13 . 27 (2022) : 8065-8073 . |
| APA | Shao, Yunlong , Zhou, Yingyan , Liu, Yuanxing , Zhang, Wenmei , Zhu, Guizhen , Zhao, Yaoyao et al. Intact living-cell electrolaunching ionization mass spectrometry for single-cell metabolomics . | CHEMICAL SCIENCE , 2022 , 13 (27) , 8065-8073 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Direct conversion of methane into value-added chemicals, such as methanol under mild conditions, is a promising route for industrial applications. In this work, atomically dispersed Rh on TiO2 suspended in an aqueous solution was used for the oxidation of methane to methanol. Promoted by copper cations (as co-catalyst) in solution, the catalysts exhibited high activity and selectivity for the production of methanol using molecular oxygen with the presence of carbon monoxide at 150 degrees C with a reaction pressure of 31 bar. Millimole level yields of methanol were reached with the selectivity higher than 99 % using the Rh/TiO2 catalysts with the promotion of the copper cation. CO was the reductive agent to generate H-2 from H2O, which led to the formation of H2O2 through the reaction of H-2 and O-2. Atomically dispersed Rh activated the C-H bond in CH4 and catalyzed the oxidation using H2O2. Copper cations maintained the low-valence state of Rh. Moreover, copper acted as a scavenger for suppressing the overoxidation, thus leading to the high selectivity of methanol.
关键词 ：
Atomic Dispersion Atomic Dispersion Copper Cations Copper Cations Rhodium Rhodium Methane Methane Methanol Methanol
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| GB/T 7714 | Gu, Fubo , Qin, Xuetao , Li, Mengwei et al. Selective Catalytic Oxidation of Methane to Methanol in Aqueous Medium over Copper Cations Promoted by Atomically Dispersed Rhodium on TiO2 [J]. | ANGEWANDTE CHEMIE-INTERNATIONAL EDITION , 2022 , 61 (18) . |
| MLA | Gu, Fubo et al. "Selective Catalytic Oxidation of Methane to Methanol in Aqueous Medium over Copper Cations Promoted by Atomically Dispersed Rhodium on TiO2" . | ANGEWANDTE CHEMIE-INTERNATIONAL EDITION 61 . 18 (2022) . |
| APA | Gu, Fubo , Qin, Xuetao , Li, Mengwei , Xu, Yao , Hong, Song , Ouyang, Mengyao et al. Selective Catalytic Oxidation of Methane to Methanol in Aqueous Medium over Copper Cations Promoted by Atomically Dispersed Rhodium on TiO2 . | ANGEWANDTE CHEMIE-INTERNATIONAL EDITION , 2022 , 61 (18) . |
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摘要 ：
Gold thin films have attracted a growing number attention because of their advantages such as easy preparation, conveniently subsequent modifications, good chemical stability, high electrical conductivity and low cytotoxicity. The preparation of continuous metal layer on capillary has become a classic leading step in the field of analytical chemistry. In recent years, researchers have established a variety of methods to prepare gold thin films, which has been applied in many fields. This paper reviews the preparation methods of gold thin films based on capillary, and its application in electrochemical sensing analysis, mainly discussing the technical characteristics and research status of electroless deposition, electrochemical deposition and physical vapor deposition. In addition, the development prospects of gold plating on capillary are also prospected.
关键词 ：
Gold thin films Gold thin films Electrochemical sensing analysis Electrochemical sensing analysis Review Review Capillary Capillary
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| GB/T 7714 | Cao Shi-Ting , Zhang Wen-Mei , Shao Yun-Long et al. Progress in Preparation of Gold Plating on Capillary for Electrochemical Sensor Analysis [J]. | CHINESE JOURNAL OF ANALYTICAL CHEMISTRY , 2021 , 49 (5) : 653-664 . |
| MLA | Cao Shi-Ting et al. "Progress in Preparation of Gold Plating on Capillary for Electrochemical Sensor Analysis" . | CHINESE JOURNAL OF ANALYTICAL CHEMISTRY 49 . 5 (2021) : 653-664 . |
| APA | Cao Shi-Ting , Zhang Wen-Mei , Shao Yun-Long , Guo Guang-Sheng , Wang Xia-Yan . Progress in Preparation of Gold Plating on Capillary for Electrochemical Sensor Analysis . | CHINESE JOURNAL OF ANALYTICAL CHEMISTRY , 2021 , 49 (5) , 653-664 . |
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摘要 ：
Intracellular delivery of materials with nanopipettes has become a critical method in gene editing and cell-based therapy because of its nanometer-scaled features capable of penetrating the cell membrane and targeting specific subcellular compartments-directing materials to the endoplasmic reticulum, nucleus, or mitochondria, for example. The geometrical parameters of nanopipettes directly affect delivery efficiency. However, the current methods for fabricating nanopipettes have the disadvantages of poor controllability, high cost, and difficult operation. To overcome these issues, we propose a real-time visualization method for fabricating nanopipettes based on pressured electrolyte chamber based wet etching to precisely determine the tip size during the fabrication process. A standard curve is plotted to provide a direction for fabrication, and tip inner diameters smaller than 10 nm can be controllably achieved. Furthermore, the intranuclear injection of proteins to living single cells (diameter < 30 mu m) with a high spatial resolution is realized. And single-cell transfection through the intracellular delivery of plasmid based on a self-built living single-cell workstation is completed. This technique is expected to be used in the treatment of diseases, for high-resolution localization of organelles in living single cells without fluorescent labeling, and for subcellular omics analysis by mass spectrometry.
关键词 ：
wet etching wet etching nanopipette nanopipette controllable fabrication controllable fabrication intracellular delivery intracellular delivery living single cell living single cell
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| GB/T 7714 | Wu, Yuanyuan , Shao, Yunlong , Zhang, Wenmei et al. Silica-Based Nanopipettes for Rapid Living Single-Cell Transfection [J]. | ACS APPLIED NANO MATERIALS , 2021 , 4 (7) : 6956-6963 . |
| MLA | Wu, Yuanyuan et al. "Silica-Based Nanopipettes for Rapid Living Single-Cell Transfection" . | ACS APPLIED NANO MATERIALS 4 . 7 (2021) : 6956-6963 . |
| APA | Wu, Yuanyuan , Shao, Yunlong , Zhang, Wenmei , Li, Boye , Zhao, Liang , Zhang, Dongtang et al. Silica-Based Nanopipettes for Rapid Living Single-Cell Transfection . | ACS APPLIED NANO MATERIALS , 2021 , 4 (7) , 6956-6963 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Fabrication of economic and high-performance electrodes for electrocatalytic oxygen evolution reaction (OER) accounts for a crucial issue associated with developing powerful and practical water splitting systems. In this work, free-standing Ni/Ni-M (M = Fe, Co, Mo) bimetallic oxides core/shell nanorod arrays (Ni/Ni-M NRAs) were prepared through electroless deposition of transition metal species on black nickel sheet (nickel nanorod arrays (Ni NRAs)) followed by electrochemical oxidation. All three types of Ni/NiM NRAs demonstrated enhanced electrocatalytic activity toward oxygen evolution reactions (OER). Especially, Ni/Ni-Fe NRAs electrode exhibit small onset potential of 1.535 V at current density of 10 mA.cm(-2). In contrast, the OER durability of these three samples was distinct. At 500 mV constant overpotential, the current density loss in OER of Ni/Ni-Fe NRAs was merely 13.5% for a period of 20000 s; but Ni/Ni-Mo and Ni/Ni-Co NRAs had almost disappeared catalytic activity under the identical conditions. According to many reports, the results were different for the superior OER stability of Ni-based bimetallic catalysts. Electrochemical analysis revealed that the NRAs structure dramatically improves charge transfer efficiency and electrochemically active surface area (ECSA). The present study might provide a new insight to design and fabricate more practical and high-performance Ni-based electrodes for OER. (C) 2021 Elsevier Ltd. All rights reserved.
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| GB/T 7714 | Yan, Yong , Liu, Haocen , Liu, Chunyue et al. Efficient preparation of Ni-M (M = Fe, Co, Mo) bimetallic oxides layer on Ni nanorod arrays for electrocatalytic oxygen evolution [J]. | APPLIED MATERIALS TODAY , 2021 , 25 . |
| MLA | Yan, Yong et al. "Efficient preparation of Ni-M (M = Fe, Co, Mo) bimetallic oxides layer on Ni nanorod arrays for electrocatalytic oxygen evolution" . | APPLIED MATERIALS TODAY 25 (2021) . |
| APA | Yan, Yong , Liu, Haocen , Liu, Chunyue , Zhao, Yuguo , Liu, Shuzhen , Wang, Dong et al. Efficient preparation of Ni-M (M = Fe, Co, Mo) bimetallic oxides layer on Ni nanorod arrays for electrocatalytic oxygen evolution . | APPLIED MATERIALS TODAY , 2021 , 25 . |
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摘要 ：
Three dimensional (3D) DNA walkers hold great potential in serving as an ideal candidate for signal transduction and amplification in bio-assays. However, the autonomous operation of 3D DNA walkers inside living cells is still few and far between, which could be attributed to the lack of suitable driving forces and moderate efficiency in terms of the cellular uptake of such complex 3D DNA components. Herein, a newly updated autonomously operated and highly integrated 3D DNA walker on Au nanoparticles (Au NPs)/zeolitic imidazolate framework-8 (ZIF-8) was activated in a tumor microenviroment and its signal amplified assay capability in living cells was demonstrated using miRNA as a sensing model biomolecule. Specifically, we assembled a 3D DNA motor, including Zn2+-dependent DNAzyme and substrates on the AuNPs grafted on ZIF-8. After being delivered into a living cell, ZIF-8 was efficiently degraded in the tumor microenvironment (low pH value), locally releasing the Zn2+ and DNA motor. Then, a self-sufficient DNA motor autonomously performed the bio-analytical task of imaging miRNA-10b, with a low detection limit of 34 pM. Also, such self-sufficient 3D walkers allowed real-time imaging of MDA-MB-231 cells by intracellular operation. This method demonstrates the self-sufficient 3D DNA motor's bioanalytical application in living cells which may inspire various other biological applications including gene delivery, therapy, etc.
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| GB/T 7714 | Hu, Hui , Zhou, Fu , Wang, Baojuan et al. Autonomous operation of 3D DNA walkers in living cells for microRNA imaging [J]. | NANOSCALE , 2021 , 13 (3) : 1863-1868 . |
| MLA | Hu, Hui et al. "Autonomous operation of 3D DNA walkers in living cells for microRNA imaging" . | NANOSCALE 13 . 3 (2021) : 1863-1868 . |
| APA | Hu, Hui , Zhou, Fu , Wang, Baojuan , Chang, Xin , Dai, Tianyue , Tian, Ruifen et al. Autonomous operation of 3D DNA walkers in living cells for microRNA imaging . | NANOSCALE , 2021 , 13 (3) , 1863-1868 . |
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摘要 ：
Many diseases are related to abnormal metabolites in cells. It is of great significance to analyze the metabolites for cellular physiological, pathological, and pharmacological research. Metabolite analysis at the single-cell level is extremely important due to cell heterogeneity. Electrospray ionization mass spectrometry (ESI-MS) has become an indispensable method for single-cell metabolite analysis with the following advantages: detection of unlabeled substrates, in situ and real-time in vivo analyses, broad-spectrum analysis, and excellent qualitative ability. In this review, we discuss published articles in the field of single-cell metabolite analysis by ESI-MS over recent years. ESI-MS methods are classified and reviewed according to the methods of obtaining single-cell samples. The achievements with respect to different approaches to sensitivity, throughput, coverage, and system stability are reviewed, and the methods with great breakthroughs are summarized and discussed. Finally, the development trend of single-cell metabolite analysis by ESI-MS is prospected. (C) 2021 Elsevier B.V. All rights reserved.
关键词 ：
Electrospray ionization Electrospray ionization Single cell Single cell Cellular heterogeneity Cellular heterogeneity Metabolite analysis Metabolite analysis Analytical methods Analytical methods Mass spectrometry Mass spectrometry
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| GB/T 7714 | Zhu, Guizhen , Shao, Yunlong , Liu, Yuanxing et al. Single-cell metabolite analysis by electrospray ionization mass spectrometry [J]. | TRAC-TRENDS IN ANALYTICAL CHEMISTRY , 2021 , 143 . |
| MLA | Zhu, Guizhen et al. "Single-cell metabolite analysis by electrospray ionization mass spectrometry" . | TRAC-TRENDS IN ANALYTICAL CHEMISTRY 143 (2021) . |
| APA | Zhu, Guizhen , Shao, Yunlong , Liu, Yuanxing , Pei, Tong , Li, Lijie , Zhang, Dongtang et al. Single-cell metabolite analysis by electrospray ionization mass spectrometry . | TRAC-TRENDS IN ANALYTICAL CHEMISTRY , 2021 , 143 . |
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摘要 ：
Hydrodynamic chromatography (HDC) is a technique originally developed for separating particles. We have recently extended it to DNA fragment sizing and quantitation. In this review, we focus on this extension. After we briefly introduce the history of HDC, we present the evolution of open tubular HDC for DNA fragment sizing. We cover both the theoretical aspect and the experimental implementation of this technique. We describe various approaches to execute the separation, discuss its representative applications and provide a future perspective of this technique in the conclusion section of this review.
关键词 ：
DNA fragment Quantitation DNA fragment Quantitation DNA fragment Sizing DNA fragment Sizing Free solution separation Free solution separation Hydrodynamic chromatography Hydrodynamic chromatography Open tubular column Open tubular column
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| GB/T 7714 | Wang, Yanan , Zhou, Yingyan , Zhang, Dongtang et al. Extension of hydrodynamic chromatography to DNA fragment sizing and quantitation [J]. | HELIYON , 2021 , 7 (9) . |
| MLA | Wang, Yanan et al. "Extension of hydrodynamic chromatography to DNA fragment sizing and quantitation" . | HELIYON 7 . 9 (2021) . |
| APA | Wang, Yanan , Zhou, Yingyan , Zhang, Dongtang , Wang, Xiayan , Liu, Shaorong . Extension of hydrodynamic chromatography to DNA fragment sizing and quantitation . | HELIYON , 2021 , 7 (9) . |
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