نتایج جستجو برای: task specific ionic liquids

تعداد نتایج: 1346587  

ژورنال: مواد پرانرژی 2016

Some mono and di imidazolium-based ionic liquids with dicyanamide were synthesized and characterized. The synthesis of these compoundes were done based on alkylation reaction of N-methylimidazole followed by anion exchange. The structure of novel ionic liquids were identified by using FT-IR, 1HNMR spectroscopies and elemental analysis. Among the synthesized ionic liquids, thermal properties of ...

Journal: :Physical chemistry chemical physics : PCCP 2013
Haiying Li Yunxiang Lu Weihong Wu Yingtao Liu Changjun Peng Honglai Liu Weiliang Zhu

In recent years, several specific imidazolium-based ionic liquids with halogen substituents on the imidazole ring as well as on the alkyl chains have been reported. In this work, noncovalent interactions in four halogenated ionic liquids, i.e. 2-bromo-/iodo- and 4,5-dibromo-/diiodo-1,3-dimethylimidazolium trifluoromethanesulfonates, were systematically investigated using density functional theo...

Journal: :iranian journal of catalysis 2012
abdol r. hajipour fatemeh rafiee

a simple and mild method for tetrahydropyranylation of alcohols is reported at room temperature using a catalytic amount of 3-methylimidazolinium hydrogensulfate([hmim]hso4) as a green, efficient and reusable catalyst. using solvent-free conditions, non-toxic and inexpensive materials, modest and clean work-up, short reaction times and high yields of the products are the advantages of this method.

Journal: :Environmental science & technology 2002
Ann E Visser Richard P Swatloski W Matthew Reichert Rebecca Mayton Sean Sheff Andrzej Wierzbicki James H Davis Robin D Rogers

A series of hydrophobic task-specific ionic liquids designed to extract Hg2+ and Cd2+ from water were prepared by appending urea-, thiourea-, and thioether-substituted alkyl groups to imidazoles and combining the resulting cationic species with PF6-. The new ionic liquids were characterized and investigated for their metal ion extraction capabilities. When used in liquid/liquid extraction of Hg...

2008
Robert S. Legge Paulo Lozano

A porous metal electrospray emitter has been tested with four different ionic liquids including those comprised with heavy ions. Time of flight experiments were conducted to characterize the emitted species for each liquid and the amount of emitted current as a function of applied voltage. The results indicate that for each ionic liquid, high quality pure ions were emitted containing no observa...

Pyridinium based ionic liquids derived from β-picoline and n-alkylbromides were synthesized by a simple procedure at ambient temperature and then characterized. These neutral ionic liquids were investigated for their dual role as the solvent and promoter for the selective synthesis of a series of N-monomethylanilines using dimethylcarbonate as the methylating agent. A solvent free gree...

2017
Enrico Bodo Valentina Migliorati

Ionic liquids are universally considered to be materials of the future. Their peculiar properties appeal to the most diverse technological areas such as chemical industry, electrochemistry, optics, environmental chemistry, medicine and nanotechnology. Their extraordinary macroscopic properties originate from the peculiar ionic nanoscopic structure and the possibility of modulating these propert...

Journal: :journal of physical & theoretical chemistry 2012
m. sadri f. sadeghzadeh darabi s. ahmadvand

ethylammonium propionate with high polarity and ionic conductivity was synthesized andcharacterized with 1hnmr and ir. this ionic liquid which is prepared from readily available startingmaterial in high yield shows reasonably high at viscosity and heat stability up to 150 °c. this ionicliquid is able to dissolve most of organic solvents due to the hydrogen interaction between ionicliquid and th...

2013
Paul Walden

Ionic liquids − defined as salts with a melting point below 100 ◦C – date back to 1914, when Paul Walden reported on [C2H5NH3][NO3], a salt with a melting point of +12 ◦C. While Walden was surely ahead of his time, ionic liquids made an impressive development during the last 10 years. This is due to their unique portfolio of properties: high temperature stability (in favourable cases up to 400 ...

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