Search results for: Yunhui Dong

Items from 1 to 20 out of 57 results

article

Acid‐Promoted Expeditious Syntheses of Aminated Dibenzosultams via Palladium/Norbornene Cooperatively Catalysed C−H Amination/Arylation

Shen Zhao, Shibo Han, Guopeng Du, Daopeng Zhang, more

Advanced Synthesis & Catalysis > 363 > 8 > 2078 - 2083

Herein we reported a protocol to access aminated benzofused sultams through sequential ortho‐amination, followed by ipso‐arylation of aryl iodide bearing sulfonamide functional group via palladium/norbornene coorperative catalysis. This reaction has showcased a broad spectrum of substrate scope under mild conditions with moderate to good efficiency.

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Palladium/Norbornene‐Catalyzed Sequential ortho‐Acylation and ipso‐Alkenylation with Carboxylic Acid: Access to Polysubstituted Aryl Ketones

Shimin Yang, Yunxia Feng, Shen Zhao, Lei Chen, more

Advanced Synthesis & Catalysis > 362 > 18 > 3919 - 3923

Herein a palladium/norbornene‐catalyzed sequential ortho‐acylation and ispo‐alkenylation for access to polysubstituted aryl ketones has been developed. By exploiting dicyclohexylcarbodiimide (DCC) as activator, aryl with electron‐donating or electron‐withdrawing functionalities, alkyl, and heteroaryl carboxylic acids were compatible in this transformation, affording the desired products in decent...

article

Pd‐Catalyzed Tandem Coupling Reaction of 2‐gem‐Dibromovinylanilines and N‐Tosylhydrazones to Construct 2‐(1‐phenylvinyl)‐indoles

Jian Song, Xiaochen Chi, Long Meng, Pingping Zhao, more

Advanced Synthesis & Catalysis > 361 > 15 > 3599 - 3604

A novel palladium(0)‐catalyzed intermolecular coupling reaction of 2‐gem‐dibromovinylanilines and N‐tosylhydrazones was reported to construct 2‐(1‐phenylvinyl)‐indoles efficiently. The indole bearing 1, 1‐disubstituted alkenes were obtained in one step with short reaction time, in high yields and broad substrate scope. The formed indole derivates could be easily transformed into much more valuable...

article

An electrochemical sandwich immunosensor for cardiac troponin I by using nitrogen/sulfur co-doped graphene oxide modified with Au@Ag nanocubes as amplifiers

Hui Lv, Xiaobo Zhang, Yueyun Li, Yong Ren, more

Microchimica Acta > 2019 > 186 > 7 > 1-10

A voltammetric sandwich immunoassay is described for the biomarker cardiac troponin I (cTnI). The gold nanocube-functionalized graphene oxide (AuNC/GO) is employed as a substrate to accelerate the electron transfer and to immobilize more primary antibodies. It also employs composite materials prepared from bimetallic gold/silver core-shell nanocubes and nitrogen and sulfur co-doped reduced graphene...

article

Correction to: Adsorption of Eu(III) on iron oxide/multiwalled carbon nanotube magnetic composites

Songsheng Lu, Lei Chen, Yunhui Dong, Yixue Chen

Journal of Radioanalytical and Nuclear Chemistry > 2019 > 320 > 3 > 893-895

In the original publication of the article, Reference [20] was not cited in Figure 1 and Figure 2 captions as the authors carried out the experiments in Institute of Plasma Physics and used the same samples as adsorbents in the experiments.

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The label-free immunosensor based on rhodium@palladium nanodendrites/sulfo group functionalized multi-walled carbon nanotubes for the sensitive analysis of carcino embryonic antigen

Hui Lv, Yueyun Li, Xiaobo Zhang, Zengqiang Gao, more

Analytica Chimica Acta > 2018 > 1007 > C > 61-70

In this work, bimetallic core-shell rhodium@palladium nanodendrites (Rh@Pd NDs) loaded on sulfo group functionalized multi-walled carbon nanotubes (MWCNTs-SO₃H) were combined to form Rh@Pd NDs/MWCNTs-SO₃H nanocomposites. And the composites were used to construct a simple and label-free electrochemical immunosensor for carcino embryonic antigen (CEA) detection using differential pulse voltammetry (DPV)...

article

A label-free electrochemical immunosensor based on the novel signal amplification system of AuPdCu ternary nanoparticles functionalized polymer nanospheres

Qin Yan, Yuying Yang, Zhaoling Tan, Qing Liu, more

Biosensors and Bioelectronics > 2018 > 103 > C > 151-157

A sensitive label-free electrochemical immunosensor was designed using a novel signal amplification system for quantitative detecting hepatitis B surface antigen (HBsAg). Nitrogen-doped graphene quantum dots (N-GQDs) supported surfactant-free AuPdCu ternary nanoparticles (AuPdCu/N-GQDs), which featured with good conductivity and excellent catalytic properties for the reduction of hydrogen peroxide...

article

Ultrasensitive electrochemical immunosensor for quantitative detection of HBeAg using Au@Pd/MoS2@MWCNTs nanocomposite as enzyme-mimetic labels

Zengqiang Gao, Yueyun Li, Xiaobo Zhang, Jinhui Feng, more

Biosensors and Bioelectronics > 2018 > 102 > C > 189-195

A sensitive sandwich-type electrochemical immunosensor for the detection of hepatitis B e antigen (HBeAg) was successfully developed based on the gold@palladium nanoparticles (Au@Pd NPs) loaded by molybdenum disulfide functionalized multiwalled carbon nanotubes (Au@Pd/MoS₂@MWCNTs). The resultant nanocomposites not only possessed high specific surface area and good biocompatibility, but also exhibited...

article

Highly sensitive immunosensor for Hepatitis B surface antigen detection based on a novel signal amplification system of gold nanorods and mesoporous Au@Pd@Pt core-shell nanospheres

Mingdang Li, Ping Wang, Fubin Pei, Haoxuan Yu, more

Journal of Electroanalytical Chemistry > 2018 > 809 > C > 14-21

In this work, a highly sensitive sandwich-type electrochemical immunosensor was fabricated by using the gold nanorods (Au NRs) as the substrate material and the mesoporous Au@Pd@Pt core-shell nanospheres (m-Au@Pd@Pt) as the label of the detection antibodies (Ab₂, Ab₂ label) for detecting Hepatitis B surface antigen (HBs Ag). The Au NRs with excellent conductivity and biocompatibility can accelerate...

article

An ultrasensitive sandwich-type electrochemical immunosensor based on the signal amplification strategy of echinoidea-shaped Au@Ag-Cu2O nanoparticles for prostate specific antigen detection

Yuying Yang, Qin Yan, Qing Liu, Yongpeng Li, more

Biosensors and Bioelectronics > 2018 > 99 > C > 450-457

Highly sensitive determination of tumor markers plays an important role in early diagnosis of cancer. Herein, a novel and ultrasensitive sandwich-type electrochemical immunosensor was fabricated for quantitative detection of prostate specific antigen (PSA). In this process, gold nanoparticles functionalized nitrogen-doped graphene quantum dots (Au@N-GQDs) was synthesized through a simple and green...

article

Synthesis and Research of Egg shell-yolk NiO/C porous composites as Lithium-ion Battery Anode Material

Guomin Li, Yong Li, Jin Chen, Pingping Zhao, more

Electrochimica Acta > 2017 > 245 > C > 941-948

An egg shell-yolk NiO/C porous composite has been prepared as lithium-ion battery anode material by two-pot hydrothermal method. Thermogravimetry(TG), X-ray diffraction(XRD), scanning electron microscopy(SEM), transmission electron microscopy(TEM), Raman spectroscopy, and nitrogen isothermal adsorption-desorption have been used to study the microstructure of the material. LANHE cell tester and electrochemical...

article

Ultrasensitive electrochemical immunosensor for quantitative detection of SCCA using Co3O4@CeO2-Au@Pt nanocomposite as enzyme-mimetic labels

Yueyun Li, Yihe Zhang, Faying Li, Jinhui Feng, more

Biosensors and Bioelectronics > 2017 > 92 > C > 33-39

Recently early diagnosis of squamous cell carcinoma antigen (SCCA) as a tumor maker of various cancers has increasingly attracted a lot of attention with heightening of incidence rate of cancer. The SCCA with low concentration in human serum should be diluted before detecting. Thus, an immunoassay with high sensitivity is significant for early detecting SCCA. Therefore, a nonenzymatic sandwich-type...

article

Sandwich-type amperometric immunosensor using functionalized magnetic graphene loaded gold and silver core-shell nanocomposites for the detection of Carcinoembryonic antigen

Yueyun Li, Yihe Zhang, Faying Li, Mingdang Li, more

Journal of Electroanalytical Chemistry > 2017 > 795 > C > 1-9

Herein, a novel and sensitive sandwich-type electrochemical immunosensor was fabricated for quantitative detection of carcinoembryonic antigen (CEA). In order to construct the base of the immunosensor, the gold nanoparticles (Au NPs) were immobilized on the surface of bare glassy carbon electrode (GCE) through electrochemical reduction of HAuCl₄ solution. The electrodeposited gold nanoparticles (D-Au...

article

A novel sandwich-type electrochemical immunosensor for PSA detection based on PtCu bimetallic hybrid (2D/2D) rGO/g-C3N4

Jinhui Feng, Yueyun Li, Mingdang Li, Faying Li, more

Biosensors and Bioelectronics > 2017 > 91 > C > 441-448

In this work, a sensitive sandwich-type electrochemical immunosensor was designed for the quantitative detection of prostate-specific antigen (PSA) by amperometric i-t. The Au loaded on thionine functionalized graphene oxide (Au@Th/GO) was used as a platform to immobilize primary antibodies (Ab₁) and accelerate the electron transfer on the electrode interface. PtCu bimetallic hybrid were loaded on...

article

An ultrasensitive sandwich-type electrochemical immunosensor based on the signal amplification system of double-deck gold film and thionine unite with platinum nanowire inlaid globular SBA-15 microsphere

Ping Wang, Mingdang Li, Fubin Pei, Yueyun Li, more

Biosensors and Bioelectronics > 2017 > 91 > C > 424-430

A novel thionine unites with platinum nanowire inlaid globular SBA-15 (Pt NWs@g-SBA-15/Thi) not only utilizes as an efficient electrical signal probe but also constitutes an amplifying system with double-deck gold film (D-Au film) have been applied to the fabrication of sandwich-type immunosensor for detecting hepatitis B surface antigen (HBs Ag). The D-Au film can accelerate the electron transfer...

article

A novel label-free electrochemical immunosensor based on functionalized nitrogen-doped graphene quantum dots for carcinoembryonic antigen detection

Yuying Yang, Qing Liu, Yan Liu, Jianjian Cui, more

Biosensors and Bioelectronics > 2017 > 90 > C > 31-38

A novel and ultrasensitive label-free electrochemical immunosensor was fabricated for quantitative detection of carcino-embryonic antigen (CEA). The nitrogen-doped graphene quantum dots (N-GQDs) supported PtPd bimetallic nanoparticles (PtPd/N-GQDs) were synthesized by a simple and green hydrothermal procedure. Subsequently, PtPd/N-GQDs functionalized Au nanoparticles (PtPd/N-GQDs@Au) were prepared...

article

Transition Metal‐Catalyzed Reactions Involving Oximes

Jun Li, Yitian Hu, Daopeng Zhang, Qing Liu, more

Advanced Synthesis & Catalysis > 359 > 5 > 710 - 771

Oximes are an easily prepared and transformed unit, which are widely used in organic synthesis. The oximes, including oxime ethers and esters, could realize various transformations, such as C–H bond activation, Heck‐type reactions, N–O bond cleavage/C–N bond formation, O–H bond cleavage and couplings. However, there is no a comprehensive review on this subject. Herein, we summarize the recent advances...

article

Frontispiece: Transition‐Metal‐Catalyzed Electrophilic Amination: Application of O‐Benzoylhydroxylamines in the Construction of the C−N Bond

Xu Dong, Qing Liu, Yunhui Dong, Hui Liu

Chemistry – A European Journal > 23 > 11 > n/a - n/a

Electrophilic Amination The task of realizing selective assembly of amines from readily available precursors has become a prominent objective in organic chemistry. The importance of C−N bond construction by application of O‐benzoylhydroxylamines in transition‐metal‐catalyzed electrophilic amination has led to the rapid development of this field. In their Review article on page 2481 ff., Q. Liu, H...

article

Transition‐Metal‐Catalyzed Electrophilic Amination: Application of O‐Benzoylhydroxylamines in the Construction of the C−N Bond

Xu Dong, Qing Liu, Yunhui Dong, Hui Liu

Chemistry – A European Journal > 23 > 11 > 2481 - 2511

Transition‐metal‐catalyzed electrophilic amination has been developed into a powerful tool for C−N bond construction. So far, O‐benzoylhydroxylamines are the most widely used electrophilic aminating reagents. Herein, we summarize the recent advances of O‐benzoylhydroxylamines involved in electrophilic amination catalyzed by transition metals. Several pioneering studies and some of the relevant mechanisms...

article

A novel sandwich-type immunosensor for detection of carcino-embryonic antigen using silver hybrid multiwalled carbon nanotubes/manganese dioxide

Jian Han, Yueyun Li, Jinhui Feng, Mingdang Li, more

Journal of Electroanalytical Chemistry > 2017 > 786 > C > 112-119

A novel sensitive sandwich-type nonenzymatical electrochemical immunosensor was fabricated for quantitative determination of the carcino-embryonic antigen (CEA). β-cyclodextrin/multiwalled carbon nanotubes (β-CD/MWCNTs) that were used as electrochemical sensing platform improved the surface of electrode to immobilize first antibodies (Ab₁) and enhanced the electrical conductivity. The synthetic silver...

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INFONA - science communication portal

Search results for: Yunhui Dong

Acid‐Promoted Expeditious Syntheses of Aminated Dibenzosultams via Palladium/Norbornene Cooperatively Catalysed C−H Amination/Arylation

Palladium/Norbornene‐Catalyzed Sequential ortho‐Acylation and ipso‐Alkenylation with Carboxylic Acid: Access to Polysubstituted Aryl Ketones

Pd‐Catalyzed Tandem Coupling Reaction of 2‐gem‐Dibromovinylanilines and N‐Tosylhydrazones to Construct 2‐(1‐phenylvinyl)‐indoles

An electrochemical sandwich immunosensor for cardiac troponin I by using nitrogen/sulfur co-doped graphene oxide modified with Au@Ag nanocubes as amplifiers

Correction to: Adsorption of Eu(III) on iron oxide/multiwalled carbon nanotube magnetic composites

The label-free immunosensor based on rhodium@palladium nanodendrites/sulfo group functionalized multi-walled carbon nanotubes for the sensitive analysis of carcino embryonic antigen

A label-free electrochemical immunosensor based on the novel signal amplification system of AuPdCu ternary nanoparticles functionalized polymer nanospheres

Ultrasensitive electrochemical immunosensor for quantitative detection of HBeAg using Au@Pd/MoS2@MWCNTs nanocomposite as enzyme-mimetic labels

Highly sensitive immunosensor for Hepatitis B surface antigen detection based on a novel signal amplification system of gold nanorods and mesoporous Au@Pd@Pt core-shell nanospheres

An ultrasensitive sandwich-type electrochemical immunosensor based on the signal amplification strategy of echinoidea-shaped Au@Ag-Cu2O nanoparticles for prostate specific antigen detection

Synthesis and Research of Egg shell-yolk NiO/C porous composites as Lithium-ion Battery Anode Material

Ultrasensitive electrochemical immunosensor for quantitative detection of SCCA using Co3O4@CeO2-Au@Pt nanocomposite as enzyme-mimetic labels

Sandwich-type amperometric immunosensor using functionalized magnetic graphene loaded gold and silver core-shell nanocomposites for the detection of Carcinoembryonic antigen

A novel sandwich-type electrochemical immunosensor for PSA detection based on PtCu bimetallic hybrid (2D/2D) rGO/g-C3N4

An ultrasensitive sandwich-type electrochemical immunosensor based on the signal amplification system of double-deck gold film and thionine unite with platinum nanowire inlaid globular SBA-15 microsphere

A novel label-free electrochemical immunosensor based on functionalized nitrogen-doped graphene quantum dots for carcinoembryonic antigen detection

Transition Metal‐Catalyzed Reactions Involving Oximes

Frontispiece: Transition‐Metal‐Catalyzed Electrophilic Amination: Application of O‐Benzoylhydroxylamines in the Construction of the C−N Bond

Transition‐Metal‐Catalyzed Electrophilic Amination: Application of O‐Benzoylhydroxylamines in the Construction of the C−N Bond

A novel sandwich-type immunosensor for detection of carcino-embryonic antigen using silver hybrid multiwalled carbon nanotubes/manganese dioxide

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