نتایج جستجو برای: quaternary phosphonium

تعداد نتایج: 15248  

Maryam Gorjizadeh, Mohammad Azarkish Mozhgan Afshari

1,4-bis(triphenylphosphonium)-2-butene dichloride was developed as a new phase transfer catalyst. This quaternized phosphonium salt catalyzed the regioselective ring opening of epoxides by thiocyanate ion to give β-hydroxy thiocyanates in high yields under mild conditions.

Journal: :Chemical communications 2014
Amir Rabiee Kenaree Bradley M Berven Paul J Ragogna Joe B Gilroy

The synthesis and characterization of a novel class of highly-metallized, redox-active polyelectrolytes that employ phosphorus as a scaffold for the installation of transition metals is described. Pyrolysis of thin films of the title polyelectrolytes resulted in the production of magnetite crystallites and ill-defined carbon-, phosphorus- and oxygen-rich phases in char yields of nearly 50%.

Journal: :Beilstein Journal of Organic Chemistry 2014

Journal: :Chemical communications 2006
Toshikazu Takahashi Tsutomu Watahiki Shoji Kitazume Hiroyuki Yasuda Toshiyasu Sakakura

The catalytic activity of phosphonium salts towards cyclic carbonate synthesis from propylene oxide and CO2 has been enormously enhanced by their immobilization onto silica that itself has no catalytic activity.

Journal: :Chemistry 2015
Feifei Han Jinhua Li Hong Zhang Tongdao Wang Zhenyang Lin Haiping Xia

The transformations of metallabenzene to substituted benzenes have been achieved by reactions of osmabenzenes with silver/copper acetylides. In this investigation, novel tetraphenylphosphonium salts containing two phosphonium substituents on the same benzene ring are generated.

Journal: :Accounts of chemical research 2014
Xiao-Yu Cao Qianyi Zhao Zhiqun Lin Haiping Xia

Aromatic compounds, such as benzene and its derivatives, porphyrins, fullerenes, carbon nanotubes, and graphene, have numerous applications in biomedicine, materials science, energy science, and environmental science. Metalla-aromatics are analogues of conventional organic aromatic molecules in which one of the (hydro)carbon segments is formally replaced by an isolobal transition-metal fragment...

Journal: :Langmuir : the ACS journal of surfaces and colloids 2016
T Jane Stockmann Ryan Guterman Paul J Ragogna Zhifeng Ding

Ionic liquids (ILs) have become valuable new materials for a broad spectrum of applications including additives or components for new hydrophobic/hydrophilic polymer coatings. However, fundamental information surrounding IL molecular properties is still lacking. With this in mind, the microinterface between two immiscible electrolytic solutions (micro-ITIES), for example, water|1,2-dichloroetha...

2015
Beata Pospiech

Facilitated transport through polymer inclusion membranes (PIMs) is a promising method for simultaneous separation and removal of valuable and toxic metal ions from aqueous solutions. Recently, ionic liquids (ILs) have been used as extracting agents for metal ions due to their unique physicochemical properties. This paper presents research on the facilitated transport of cadmium(II) and copper(...

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