نتایج جستجو برای: silver catalyst

تعداد نتایج: 89016  

Journal: :Physical chemistry chemical physics : PCCP 2013
Yuko S Yamamoto Ken Hirano Tomomi Ishido Takao Yasui Norio Murase Yoshinobu Baba Tamitake Itoh

We demonstrate a dark-field microscopic technique for real-time monitoring of DNA metallization. The growth of silver nanoparticles on DNA molecules was observed using plasmon resonance light scattering in the presence of a weak catalyst triggering photo-reduction of Ag(+). This simple strategy could facilitate the controlled fabrication of DNA-templated nanoelectronic devices.

Journal: :Chemical communications 2014
Lei Hu Olof Ramström

A dynamic azomethine ylide system was established using Sc(OTf)3 and Ag/Taniaphos as catalysts. The system was subsequently kinetically resolved in a tandem 1,3-dipolar cycloaddition process where the silver complex acted as both a reaction catalyst and an external selector, resulting in the formation of an exclusive pyrrolidine product in good yield and enantiopurity.

2016
Fang Peng Qi Wang Rongjia Shi Zeyi Wang Xin You Yuhong Liu Fenghe Wang Jay Gao Chun Mao

A novel and efficient catalyst is one of the goals in the material field, and the involvement of nanoscience and technology has brought new vigor to the development of catalyst. This research aimed to develop a simple two-step route to fabricate Fe3O4@PS/PDA-Ag hybridnanotubes with size-controllable and highly dispersed silver nanoparticles (NPs). First, Fe3O4@PS nanotubes of a sound mechanical...

Journal: :Chemical science 2012
Andrew D Lim Julian A Codelli Sarah E Reisman

A catalytic asymmetric double (1,3)-dipolar cycloaddition reaction has been developed. Using a chiral silver catalyst, enantioenriched pyrrolizidines can be prepared in one flask from inexpensive, commercially available starting materials. The pyrrolizidine products contain a variety of substitution patterns and as many as six stereogenic centers.

Journal: :Chemical communications 2016
Uğur Kaya Pankaj Chauhan Daniel Hack Kristina Deckers Rakesh Puttreddy Kari Rissanen Dieter Enders

An enantioselective one-pot Michael addition/hydroalkoxylation reaction between 2-hydroxy-1,4-naphthoquinones and alkyne-tethered nitroalkenes catalyzed by a cinchona-derived squaramide and a silver(I) salt has been developed. The sequential protocol provides a direct access to 4H-pyranonaphthoquinones in moderate to very good yields and good to excellent enantioselectivities at a very low cata...

2017
Suqing Liang Yaoyao Li Tingjiao Zhou Jinbin Yang Xiaohu Zhou Taipeng Zhu Junqiao Huang Julie Zhu Deyong Zhu Yizhen Liu Chuanxin He Junmin Zhang Xuechang Zhou

A low-cost, solution-processed, versatile, microfluidic approach is developed for patterning structures of highly conductive metals (e.g., copper, silver, and nickel) on chemically modified flexible polyethylene terephthalate thin films by in situ polymer-assisted electroless metal deposition. This method has significantly lowered the consumption of catalyst as well as the metal plating solution.

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد شاهرود - دانشکده علوم پایه 1389

چکیده ندارد.

Journal: :Green Chemistry 2021

A silver-containing hybrid material is reported as a heterogeneous noble metal catalyst for protodecarboxylations and decarboxylative deuterations of carboxylic acids.

2016
L. Savary G. Costentin F. Maugé F. Studer J. Lavalley

The catalytic performances in the oxidation of propane of the AgM@2014 catalyst are quite good, leading to 70% of propene selectivity at 7% of propane conversion. We have checked that, before reaction, results of XANES and EXAFS obtained at the MO K-edge (19999 eV) d r m those obtained by X-ray spectroscopy (oxidation state and MO number of oxygen neighbour of 5.66, Mo=O bond length=1.72A). Mer...

2011
Ngoc Linh Nguyen Simone Piccinin Stefano de Gironcoli

Ethylene oxide, obtained through partial oxidation of ethylene, is an important compound for the chemical industry, because it is widely used as an intermediate for the production of chemicals such as ethylene glycol, which finds applications as an antifreeze and as a precursor to polymers. The oxidation of ethylene can lead either to the desired product (ethylene oxide, EO) or to the formation...

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