نتایج جستجو برای: supported ionic liquid

تعداد نتایج: 442642  

Journal: :Physical chemistry chemical physics : PCCP 2009
Sebastian Werner Normen Szesni Richard W Fischer Marco Haumann Peter Wasserscheid

Novel ruthenium-based supported ionic liquid phase (SILP) catalysts for the water-gas shift (WGS) reaction are reported which, compared to classical low temperature shift systems, operate at much lower temperatures and even at ambient pressure.

Journal: :physical chemistry research 2016
hemayat shekaari mohammed taghi zafarani-moattar fariba ghaffari

the density (d), speed of sound (u) and electrolytic conductivity (λ) for systems containing acetaminophen, ionic liquid {1-octyl-3-methyl imidazolium bromide, [omim] br} and water have been measured at t = 293.15-308.15 k. the measured data have been applied to calculate, standard partial molar volume ( ), hepler’s constant , apparent molar isentropic compressibility (kφ), transfer volume ( ),...

Journal: :Chemical communications 2008
Jürgen Arras Martin Steffan Yalda Shayeghi Peter Claus

Conventional supported heterogeneous palladium catalysts in combination with a dicyanamide based ionic liquid are highly active with excellent selectivity in enabling the one-pot synthesis of citronellal through citral hydrogenation.

Journal: :Chemical communications 2011
Yuanting Chen Linlu Bai Chunmei Zhou Jong-Min Lee Yanhui Yang

The aerobic oxidation of 1-phenylethanol over a carbon nanotube supported palladium catalyst was improved with an ionic liquid additive [emim][NTf(2)], showing an excellent TON of 149,000 which can be maintained for 5 recycle runs.

The ionic liquid, N,N,N,N-tetramethylguanidiniumtriflate (TMGTf) was found to be an efficient catalyst solvent for Henry reaction between nitromethane and isatin derivatives to provide 3-hydroxy-3-(nitromethyl)indolin-2-one under mild conditions. The ionic liquid amenable to successive recycling without appreciable decrease in activity. Synthesized compounds have been screened for their anti-di...

Journal: :Chemical communications 2008
Yu Sung Chun Ju Yeon Shin Choong Eui Song Sang-gi Lee

Palladium nanoparticles have been deposited onto imidazolium bromide-functionalized ionic MWCNTs through hydrogen reduction of Na2PdCl4 in water without aid of surfactants under extremely mild conditions, and combined with an ionic liquid to create a new recyclable ionic liquid-based catalytic system allowing up to 50 times recycling.

Journal: :Chemistry 2005
Feng Shi Qinghua Zhang Dongmei Li Youquan Deng

A new concept of designing and synthesizing highly dispersed ionic-liquid catalysts was developed through physical confinement or encapsulation of ionic liquids (with or without metal complex) in a silica-gel matrix through a sol-gel process. We studied ionic liquids such as EMImBF4, BuMImBF4, DMImBF4, CMImBF4, BuMImPF6, either with or without [Pd(PPh3)2Cl2] and [Rh(PPh3)3Cl], in a silica-gel m...

Journal: :Organic & biomolecular chemistry 2011
Babak Karimi Ebrahim Badreh

A novel SBA-15-functionalized TEMPO confined ionic liquid [BMIm]Br was found to be a highly efficient and recyclable catalyst system for the transition-metal-free aerobic oxidation of a wide range of structurally diverse alcohols. Thanks to the strong physical confinement of the ionic liquid inside the mesochannels of SBA-15-supported TEMPO, the resulting solid catalyst showed improved selectiv...

Journal: :iranian journal of catalysis 2012
abdol r. hajipour ifa mahboobi dehbane

α-amino nitriles are synthesized in a one-pot, three-component coupling of aldehydes (or ketones), aniline, and trimethylsilyl cyanide using a catalytic amount of choline chloride.2zncl2 as a bio lewis acidic ionic liquid. mild lewis acidic characteristic of this ionic liquid allows efficient synthesis of α-amino nitriles from acid sensitive aldehydes.

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