共查询到20条相似文献,搜索用时 31 毫秒
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Pavel Arsenyan Ramona Abele Sergey Belyakov Edgars Abele Edmunds Lukevics 《应用有机金属化学》2005,19(7):875-876
The title compound is a silver nitrate complex with two molecules of 2‐mercaptobenzimidazole derivative. The silver atom lies on an inversion centre of the crystal lattice; nitrogen of the nitrate anion is in another inversion centre. Bond length Ag(1)? N(7) is 2.087(3) Å. Copyright © 2005 John Wiley & Sons, Ltd. 相似文献
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Prof. Deliang Chen Seung Hwa Yoo Dr. Qingsong Huang Ghafar Ali Prof. Sung Oh Cho 《Chemistry (Weinheim an der Bergstrasse, Germany)》2012,18(17):5192-5200
A novel one‐step sonochemical approach to synthesize a plasmonic photocatalyst of AgCl nanocubes (ca. 115 nm in edge length) with a small amount of Ag metal species is presented. The nanoscale Ag/AgCl hybrid photocatalysts with cubic morphology are readily formed under ambient ultrasonic conditions and neither external heat treatment nor reducing agents are required. The size of the Ag/AgCl photocatalysts could be controlled by changing the concentrations of Ag+ ions and polyvinylpyrrolidone molecules in precursor solutions. The compositions, microstructures, influencing factors, and possible growth mechanism of the Ag/AgCl hybrid nanocubes were systematically investigated. The Ag/AgCl photocatalysts show excellent photocatalytic performance for degradation of various dye molecules under visible light. 相似文献
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Dr. Clément F. Heinrich Indira Fabre Dr. Laurence Miesch 《Angewandte Chemie (International ed. in English)》2016,55(17):5170-5174
Cyclization of silylenolether‐ynesulfonamides proceeds at ambient temperature under mild reaction conditions under silver catalysis. Bridged compounds were obtained exclusively through 7‐exo‐dig reactions. The protocol is applicable to a wide range of substrates, thus leading to azabicyclic frameworks. 相似文献
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Copper colloid was prepared via reductive stabilization. The suspension of the trioctylaluminum‐stabilized copper colloid was peptized using Korantin SH and cashew nut shell liquid (CNSL). Fluids with particle sizes <10 nm were obtained with Korantin and 7–15 nm in the case of CNSL. However, the copper colloid is air sensitive. A very straightforward one‐step method leads to air‐stable silver nanofluids. Thermal decomposition of silver lactate in the presence of Korantin SH and mineral oil as the medium gave a silver nanofluid. Silver particle formation and air stability were monitored using UV–VIS spectroscopy. The presence of monodispersed spherical silver nanoparticles was confirmed. Transmission electron microscopy showed a two‐dimensional assembly of the silver particles with a size distribution of 9.5 ± 0.7 nm. FTIR has revealed information about the interaction between the surfactant and the silver surface. Copyright © 2005 John Wiley & Sons, Ltd. 相似文献
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A New p‐Metal‐n Structure AgBr‐Ag‐BiOBr with Superior Visible‐Light‐Responsive Catalytic Performance 下载免费PDF全文
Dr. Yuming Dong Cuiyun Feng Jingjing Zhang Prof. Dr. Pingping Jiang Dr. Guangli Wang Xiuming Wu Hongyan Miao 《化学:亚洲杂志》2015,10(3):687-693
A novel visible‐light‐driven AgBr‐Ag‐BiOBr photocatalyst was synthesized by a facile hydrothermal method. Taking advantage of both p‐n heterojunctions and localized surface plasmon resonance, the p‐metal‐n structure exhibited a superior performance concerning degradation of methyl orange under visible‐light irradiation (λ>420 nm). A possible photodegradation mechanism in the presence of AgBr‐Ag‐BiOBr composites was proposed, and the radical species involved in the degradation reaction were investigated. HO2?/?O2? played the same important role as ?OH in the AgBr‐Ag‐BiOBr photocatalytic system, and both the electron and hole were fully used for degradation of organic pollutants. A dual role of metallic Ag in the photocatalysis was proposed, one being surface plasmon resonance and the other being an electron‐hole bridge. Due to the distinctive p‐metal‐n structure, the visible‐light absorption, the separation of photogenerated carriers and the photocatalysis efficiency were greatly enhanced. 相似文献
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Dr. Jong Wook Hong Yena Kim Dae Han Wi Seunghoon Lee Su‐Un Lee Young Wook Lee Prof. Sang‐Il Choi Prof. Sang Woo Han 《Angewandte Chemie (International ed. in English)》2016,55(8):2753-2758
A synthesis strategy for the preparation of ultrathin free‐standing ternary‐alloy nanosheets is reported. Ultrathin Pd‐Pt‐Ag nanosheets with a thickness of approximately 3 nm were successfully prepared by co‐reduction of the metal precursors in an appropriate molar ratio in the presence of CO. Both the presence of CO and the interplay between the constituent metals provide fine control over the anisotropic two‐dimensional growth of the ternary‐alloy nanostructure. The prepared Pd‐Pt‐Ag nanosheets were superior catalysts of ethanol electrooxidation owing to their specific structural and compositional characteristics. This approach will pave the way for the design of multicomponent 2D nanomaterials with unprecedented functions. 相似文献
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Synthesis and characterization nanocomposite of polyacrylamide‐rGO‐Ag‐PEDOT/PSS hydrogels by photo polymerization method 下载免费PDF全文
We present a novel approach to the fabrication of advanced polymeric nanocomposite hydrogels from polyacrylamide (PAAm) by incorporation of graphene‐silver‐polyethylenedioxythiophene‐polystyrene sulfonate (rGO‐Ag‐PEDOT/PSS) by photopolymerization method. Infrared spectroscopy was employed to characterize the structure of the hydrogels. The internal network structure of nanocomposite hydrogels was investigated by scanning electron microscope. Swelling, deswelling, and mechanical properties of the hydrogels were investigated. The compressive strength of nanocomposite hydrogels reaches maximum of 1.71 MPa when the ratio of rGO‐Ag‐PEDOT/PSS to PAAm was 0.3 wt%, which is 1.57 times higher than that of PAAm hydrogels (1.09 MPa). The electrical conductivity of the PAAm‐rGO‐Ag‐PEDOT/PSS hydrogel was found to be 3.91 × 10?5 S cm?1. Copyright © 2015 John Wiley & Sons, Ltd. 相似文献
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Highly efficient AgNO3‐catalyzed approach to 2‐(benzo[d]azol‐2‐yl)phenols from salicylaldehydes with 2‐aminothiophenol, 2‐aminophenol and benzene‐1,2‐diamine 下载免费PDF全文
A new, convenient and efficient AgNO3‐catalyzed strategy for the preparation of 2‐(benzo[d]azol‐2‐yl)phenol derivatives in good to excellent yields (63–98%) is described. The reaction proceeds via condensation/intramolecular nucleophilic addition/oxidation process between substituted salicylaldehydes and 2‐aminothiophenol, 2‐aminophenol or benzene‐1,2‐diamine under mild reaction conditions. Notably, this reaction utilizes cheap AgNO3 as a readily available and low‐cost benign oxidant at low catalyst loadings with excellent functional group tolerance. 相似文献
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Back Cover: Silver‐Catalyzed Cross‐Coupling of Propargylic Alcohols with Isocyanides: An Atom‐Economical Synthesis of 2,3‐Allenamides (Chem. Eur. J. 8/2014) 下载免费PDF全文
Jianquan Liu Zhenhua Liu Nannan Wu Dr. Peiqiu Liao Prof. Xihe Bi 《Chemistry (Weinheim an der Bergstrasse, Germany)》2014,20(8):2388-2388
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Dr. Sebastian Bestgen Dr. Xiaoxun Yang Dr. Ibrahim Issac Dr. Olaf Fuhr Prof. Dr. Peter W. Roesky Prof. Dr. Dieter Fenske 《Chemistry (Weinheim an der Bergstrasse, Germany)》2016,22(29):9933-9937
The silver salts of 1‐adamantanethiol (AdSH) and furan‐2‐ylmethanethiol (FurCH2SH) were successfully applied as building blocks for ligand‐protected Ag2S nanoclusters. The reaction of the silver thiolates [AgSAd]x and [AgSCH2Fur]x with S(SiMe3)2 and 1,5‐bis(diphenylphosphino)pentane (dpppt) afforded three different clusters with 58, 94 and, 190 silver atoms. The intensely colored compounds [Ag58S13(SAd)32] ( 1 ), [Ag94S34(SAd)26(dpppt)6] ( 2 ), and [Ag190S58(SCH2Fur)74(dpppt)8] ( 3 ) were structurally characterized by single‐crystal X‐ray diffraction and exhibit different cluster core geometries and ligand shells. The diameters of the well‐defined sphere‐shaped nanoclusters range from 2.2 nm to 3.5 nm. 相似文献
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Tandem Gold/Silver‐Catalyzed Cycloaddition/Hydroarylation of 7‐Aryl‐1,6‐enynes to Form 6,6‐Diarylbicyclo[3.2.0]heptanes 下载免费PDF全文
Bradley D. Robertson Rachel E. M. Brooner Prof. Ross A. Widenhoefer 《Chemistry (Weinheim an der Bergstrasse, Germany)》2015,21(15):5714-5717
Mixtures of [{PCy2(o‐biphenyl)}AuCl] and AgSbF6 catalyze the tandem cycloaddition/hydroarylation of 7‐aryl‐1,6‐enynes with electron‐rich arenes to form 6,6‐diarylbicyclo[3.2.0]heptanes in good yield under mild conditions. Experimental observations point to a mechanism involving gold‐catalyzed cycloaddition followed by silver‐catalyzed hydroarylation of a bicyclo[3.2.0]hept‐1(7)‐ene intermediate. 相似文献
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Functionalization of Styrenes by Copper‐Catalyzed Borylation/ ortho‐Cyanation and Silver‐Catalyzed Annulation Processes 下载免费PDF全文
Dr. Wanxiang Zhao Prof. John Montgomery 《Angewandte Chemie (International ed. in English)》2015,54(43):12683-12686
An efficient two‐step method for the assembly of indanone derivatives starting from a simple vinyl arene has been developed. The sequence first involves addition of bis(pinacolato)diboron (B2pin2) and N‐cyano‐N‐phenyl‐p‐methylbenzenesulfonamide (NCTS) to a broad range of styrenes by utilizing IMesCuCl as catalyst. This step simultaneously accomplishes hydroboration of the alkene and ortho cyanation of the benzene unit. The products thus obtained are further functionalized by a AgNO3/Selectfluor‐mediated coupling of the BPin and cyano functionalities to annulate a new five‐membered ring. This combined two‐step sequence provides a versatile method for the site‐selective derivatization of a broad range of vinyl arene substrates. 相似文献
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Cover Picture: One‐Step Synthesis of Silver Nanoparticle‐Decorated Hydroxyapatite Nanowires for the Construction of Highly Flexible Free‐Standing Paper with High Antibacterial Activity (Chem. Eur. J. 32/2016) 下载免费PDF全文
Dr. Zhi‐Chao Xiong Prof. Dr. Ying‐Jie Zhu Fei‐Fei Chen Tuan‐Wei Sun Yue‐Qin Shen 《Chemistry (Weinheim an der Bergstrasse, Germany)》2016,22(32):11089-11089
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Seyed Jamaleddin Peighambardoust Hamed Rikhtegar Parisa Mohammadzadeh Pakdel Abdolreza Mirmohseni 《先进技术聚合物》2019,30(8):1996-2004
In this research, a conductive adhesive based on epoxy resin as the polymer matrix and silver‐coated copper powder and silver‐coated reduced graphene oxide as conductive fillers was synthesized. Graphene oxide was synthesized by modified Hummer's method. It was reduced and modified by silver powder. Copper particles were coated with silver using the electroless plating method. Finally, conductive nanocomposite adhesives were prepared using conductive fillers with different weight fractions. The structural properties of fillers were identified by Fourier‐transform infrared (FTIR) and induced coupled plasma (ICP) analysis and the morphology of the samples by scanning electron microscopy (SEM). Finally, conductive properties, lap shear strength, and thermal stability of adhesive were evaluated. The conductive adhesive prepared with optimized properties have 70% weight percentage silver‐coated copper powder and 1% weight percentage silver‐coated reduced graphene oxide. The bulk resistivity of the optimum sample was 1.6 × 10‐2 Ω.cm, and the lap shear strength was 7.10 MPa. Also, thermogravimetric analysis showed that the weight loss of adhesive decreased from 88.72% to 30.55% during heating, which showed the addition of fillers improves the thermal stability of adhesive. 相似文献
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Matthew V. Joannou Brandon S. Moyer Matthew J. Goldfogel Prof. Simon J. Meek 《Angewandte Chemie (International ed. in English)》2015,54(47):14141-14145
A catalytic protocol for the diastereoselective synthesis of anti‐1,2‐hydroxyboronates is described. The process provides access to secondary alkyl organoborons. The deborylative 1,2‐addition reactions of alkyl 1,1‐diborons proceed in the presence of a silver(I) salt with either KOtBu or nBuLi as an activator. The catalytic diastereoselective protocol can be extended to aryl, alkenyl, and alkyl aldehydes with up to 99:1 d.r. 相似文献
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The addition of nucleophiles to C?N bonds offers a highly efficient synthetic strategy for accessing nitrogen‐containing molecules. 1 Among the well‐developed addition reactions, such as the highly efficient Mannich reaction, various C? H bond‐activated compounds including carboxylic acid derivatives, nitroalkanes, and terminal alkynes have been applied as nucleophiles to achieve different classes of amines. 2 However, employing new nucleophiles without activated C? H bonds, such as internal alkynes and allenic esters are limited when using metal catalysts. 3 Herein, we wish to report a new addition of allenic esters to C?N bonds initiated by a silver‐catalyzed 1,3‐migration of propargylic esters. 相似文献
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Xiao‐Min Hao Gang Chen Chang‐Sheng Gu Ji‐Wei Liu 《Acta Crystallographica. Section C, Structural Chemistry》2013,69(8):826-828
In the title coordination polymer, [Ag2(C4H4O4S)], each AgI cation is four‐coordinated by three of the four carboxylate O atoms and the S atom from symmetry‐related sulfanediyldiacetate ligands, thus defining a distorted tetrahedral geometry at the metal centre. The AgI cations are bridged by sulfanediyldiacetate groups, leading to a two‐dimensional layer structure. These layers are interconnected via Ag—S bonds to form a three‐dimensional coordination polymer network overall. 相似文献