The Experts below are selected from a list of 282 Experts worldwide ranked by ideXlab platform
Jian Wang - One of the best experts on this subject based on the ideXlab platform.
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A Facile One‐Pot Metal‐Free Synthesis of 1,4‐Disubstituted 1,2,3‐Triazoles.
ChemInform, 2015Co-Authors: Gongming Yang, Lei Chen, Zhiyun Du, Yanqiong Zhong, Jian WangAbstract:A one-Pot method for the direct conversion of organic azides (I) and (IV) and aliphatic aldehydes (II) to 1,2,4-triazoles is developed.
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a facile one Pot Metal free synthesis of 1 4 disubstituted 1 2 3 triazoles
ChemInform, 2015Co-Authors: Gongming Yang, Lei Chen, Zhiyun Du, Yanqiong Zhong, Jian WangAbstract:A one-Pot method for the direct conversion of organic azides (I) and (IV) and aliphatic aldehydes (II) to 1,2,4-triazoles is developed.
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Facile one-Pot synthesis of 2,3-thienoimides via formal [3+2] annulation reaction of 1,4-dithiane-2,5-diol and N-substituted imides
Tetrahedron Letters, 2015Co-Authors: Yimin Hu, Yanhong Peng, Minghu Wu, Jian WangAbstract:Abstract A formal [3+2] annulation reaction of 1,4-dithiane-2,5-diol and N -substituted imides through one-Pot Metal-free strategy has been developed. This method could furnish 2,3-thienoimides in good to high yields.
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a facile one Pot Metal free synthesis of 1 4 disubstituted 1 2 3 triazoles
European Journal of Organic Chemistry, 2015Co-Authors: Gongming Yang, Lei Chen, Zhiyun Du, Yanqiong Zhong, Jian WangAbstract:A 1,3-dipolar cycloaddition reaction of commercially available aldehydes with azides and secondary amines through a one-Pot strategy has been developed. This method furnishes 1,4-disubstituted 1,2,3-triazoles in good to excellent yields and high levels of regioselectivity.
Vinod Mathew - One of the best experts on this subject based on the ideXlab platform.
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Bitter gourd-shaped Ni3V2O8 anode developed by a one-Pot Metal-organic framework-combustion technique for advanced Li-ion batteries
Ceramics International, 2017Co-Authors: Vaiyapuri Soundharrajan, Balaji Sambandam, Jinju Song, Jeonggeun Jo, Duong Tung Pham, Vinod MathewAbstract:Abstract The present study reports on the one-Pot synthesis of Ni 3 V 2 O 8 (NVO) electrodes by a simple Metal organic framework-combustion (MOF-C) technique for anode applications in Li-ion batteries (LIBs). The particle morphology of the prepared NVO is observed to vary as irregular rods, porous bitter gourd and hybrid micro/nano particles depending on the concentration of the framework linker used during synthesis. In specific, the orthorhombic phase and the unique bitter gourd-type secondary structure comprised of agglomerated nanoparticles and porous morphologies is confirmed using powder X-ray diffraction, electron microscopies, X-ray photoelectron spectroscopy and N 2 adsorption–desorption measurements. When tested for lithium batteries as anode, the bitter gourd-type NVO electrode shows an initial discharge capacity of 1362 mA h g −1 and a reversible capacity of 822 mA h g −1 are sustained at a rate of 200 mA g −1 after 100 cycles. Moreover, at 2000 mA g −1 , a reversible capacity of 724 mA h g −1 is retained after 500 cycles. Interestingly, the porous bitter gourd-shaped NVO electrode registered significantly high rate performance and reversible specific capacities of 764, 531 and 313 mA h g −1 at high rates of 1, 5 and 10 A g −1 , respectively.
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Metal organic framework-combustion: A one-Pot strategy to NiO nanoparticles with excellent anode properties for lithium ion batteries
Journal of Energy Chemistry, 2017Co-Authors: Vaiyapuri Soundharrajan, Balaji Sambandam, Jinju Song, Jeonggeun Jo, Pham Tung Duong, Vinod MathewAbstract:Abstract NiO nanoparticles with average particles size of 30 nm are synthesized using a one-Pot Metal–organic framework-combustion (MOF-C) technique, for use as an anode material in rechargeable lithium ion batteries (LIBs). The structural and electronic properties of these nanoparticles are studied using various techniques, including powder X-ray diffraction (PXRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and N 2 adsorption/desorption studies. The as-synthesized NiO nanoparticles sustained reversible stable capacities of 748 and 410 mAh/g at applied current densities of 500 and 1000 mA/g, respectively, after 100 cycles. Furthermore, the anode displays a notable rate capability, achieving a stable capacity of ∼200 mAh/g at a high current density of 10 A/g. These results indicate that the size of the NiO nanoparticles and their high surface area influence their electrochemical properties. Specifically, this combustion strategy is clearly favorable for improving the cyclability and rate capability of various Metal oxides in rechargeable battery electrodes.
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A sponge network-shaped Mn3O4/C anode derived from a simple, one-Pot Metal organic framework-combustion technique for improved lithium ion storage
Inorganic chemistry frontiers, 2016Co-Authors: Balaji Sambandam, Vaiyapuri Soundharrajan, Jinju Song, Jeonggeun Jo, Duong Pham Tung, Vinod MathewAbstract:A sponge network-shaped Mn3O4 material is synthesized by a one-Pot Metal organic framework-combustion (MOF-C) technique for Li-ion battery anodes with improved performance. The as-synthesized ordered sponge network morphology is characterized by various techniques, such as powder X-ray diffraction, scanning electron microscopy, transmission electron microscopy, Raman spectroscopy, X-ray photoelectron spectroscopy, and N2 adsorption–desorption measurements. The one-Pot synthesized Mn3O4 material shows a uniform amorphous graphitic carbon coating with few-nanometer thickness on the surface. This anode shows an initial discharge capacity of 1186 mA h g−1 and a reversible capacity of 768 mA h g−1 is maintained at an applied current density of 200 mA g−1 after 100 cycles. Sustained reversible capacities of 651 and 592 mA h g−1 are measured for the other two different current densities of 500 and 700 mA g−1, respectively, after 120 cycles, demonstrating the high stability of the anode. This unique morphology appears to contribute to the significantly high rate performance, as observed from the retained reversible capacity of 155 mA h g−1 at a very high current density of 10 000 mA g−1, which is maintained for the next two subsequent sequences with a notable recovered capacity of 700 mA h g−1 for an intermediate current density of 400 mA g−1 after 175 cycles.
Marcio W Paixao - One of the best experts on this subject based on the ideXlab platform.
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an efficient one Pot strategy for the highly regioselective Metal free synthesis of 1 4 disubstituted 1 2 3 triazoles
Chemical Communications, 2014Co-Authors: Arlene G Correa, Diego Alves, Julio Zukermanschpector, Bernhard Westermann, Marco A B Ferreira, Marcio W PaixaoAbstract:A simple and efficient Metal-free methodology for the regioselective synthesis of 1,4-disubstituted-1,2,3-triazoles has been developed by applying a novel inverse electron-demand-1,3-dipolar cycloaddition approach. The practical one-Pot Metal-free strategy can be accomplished with various alkylidene malononitriles and aromatic azides in the presence of base.
Anxin Wu - One of the best experts on this subject based on the ideXlab platform.
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acid catalyzed multicomponent tandem double cyclization a one Pot Metal free route to synthesize polyfunctional 4 9 dihydropyrrolo 2 1 b quinazolines
Journal of Organic Chemistry, 2016Co-Authors: Dengkui Li, Rongrong Zhou, Shiyi Zhuang, Yandong Wu, Anxin WuAbstract:An acid-catalyzed multicomponent tandem double cyclization protocol has been developed for the synthesis of polyfunctional 4,9-dihydropyrrolo[2,1-b]quinazolines from simple and readily available arylglyoxal monohydrates, 2-aminobenzylamine, and trans-β-nitrostyrenes. This practical and Metal-free reaction proceeds through an imine formation/cyclization/Michael addition/Henry cyclization protocol, resulting in the construction of four new bonds and two ring moieties directly in one Pot.
Sartaj Tabassum - One of the best experts on this subject based on the ideXlab platform.
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Template synthesis of novel carboxamide dinuclear copper (II) complex: spectral characterization and reactivity towards calf-thymus DNA
BioMetals, 2008Co-Authors: Suvigya Mathur, Sartaj TabassumAbstract:Dinuclear complexes Bis [aqua 1,8-(1,2-dicarboxamido benzene) 3,6-diazaoctane copper (II)/nickel (II)] tetrachloride ( 1 and 2 ) were synthesized by a two component one-Pot Metal template condensation between phthalic anhydride and 1,8-diamino 3,6-diazaoctane. Elemental analysis, molar conductance measurements, electronic absorption, infra-red, electron paramagnetic resonance, nuclear magnetic resonance, atomic absorption, and electron spray mass spectral studies have been performed to probe the nature and structure of the complexes. The interaction of copper (II) complex with calf thymus (CT-DNA) has been studied by using absorption, emission and circular dichoric spectral methods, viscometry, and cyclic voltammetry. A strong hyperchromism along with a red shift in UV bands and hypochromism in the ligand field band of the complex 1 on interaction with CT-DNA imply a covalent mode of DNA binding. This is further confirmed by studying the reactivity of complex 1 using circular dichroism and viscosity measurements. The variation in relative emission intensity of DNA-bound ethidium bromide observed upon treatment with the complex 1 parallel the trend of DNA binding studies. Cyclic voltammetry studies reveal that the complex 1 prefers to bind to DNA in Cu(II) rather than Cu(I) oxidation state.