نتایج جستجو برای: ionic liquids ils

تعداد نتایج: 63940  

Journal: :Molecules 2013
Nadège Ferlin Sylvain Gatard Albert Nguyen Van Nhien Matthieu Courty Sandrine Bouquillon

D-Xylose-based ionic liquids have been prepared from D-xylose following a five steps reaction sequence, the key step being a click cycloaddition. These ionic liquids (ILs) have been characterized through classical analytical methods (IR, NMR, mass spectroscopy, elemental analysis) and their stability constants, Tg and Tdec, were also determined. Considering their properties and their hydrophili...

Journal: :Molecules 2010
Yue Chen Yuangang Zu Yujie Fu Xuan Zhang Ping Yu Guoyong Sun Thomas Efferth

An efficient synthesis of a valuable intermediate of coenzyme Q(10) by microwave-assisted Lewis acidic ionic liquid (IL)-catalyzed Friedel-Crafts alkylation is reported. The acidity of six [Etpy]BF(4)-based ionic liquids was characterized by means of the FT-IR technique using acetonitrile as a molecular probe. The catalytic activities of these ionic liquids were correlated with their Lewis acid...

Journal: :Chemical communications 2007
Doo Seong Choi Dong Hyun Kim Ueon Sang Shin Ravindra R Deshmukh Sang-gi Lee Choong Eui Song

Imidazolium ionic liquids (ILs) exhibited a dramatic acceleration effect on the electron transfer from metal complexes such as (C(5)Me(5))(2)Fe(II) and (C(5)Me(5))(2)Co(II) to the oxygen molecule; this acceleration effect can be ascribed to the stabilization of the oxygen radical anions by coordinating with the acidic C2-H of imidazolium ILs.

Journal: :Chemical communications 2012
Manishkumar D Joshi Guillaume Chalumot Yong-wah Kim Jared L Anderson

A novel class of ionic liquids (ILs), exhibiting high selectivity towards boron species as well as the ability to phase separate from water, were synthesized from N-methyl-D-glucamine. The complexation of boric acid/borate with the ILs was confirmed using (11)B NMR.

Journal: :Scientific reports 2015
K Grzybowska A Grzybowski Z Wojnarowska J Knapik M Paluch

Ionic liquids (ILs) constitute an active field of research due to their important applications. A challenge for these investigations is to explore properties of ILs near the glass transition temperature Tg, which still require our better understanding. To shed a new light on the issues, we measured ILs and their base counterparts using the temperature modulated calorimetry. We performed a compa...

2013
Rohitkumar G. Gore Nicholas Gathergood

Molten salts which are ionic (i.e. a mixture of cation and anion) in nature and have a melting point below 100 °C are termed as Ionic liquids (ILs). [1] Preferably salts which are liquid at room temperature are called room temperature ionic liquids (RTILs). ILs have received great attention in the last couple of decades due to their unique properties such as low va‐ pour pressure, high thermal ...

2012
Zhi-qiang Tan Jing-fu Liu Long Pang

Ionic liquids (ILs) are regarded as non-molecular solvents, as they are composed entirely of cations and anions. ILs possess several excellent unique properties (e.g., low volatility, high thermal stability, specific electrochemical characteristics, easy design, tunable viscosity, and miscibility with water or organic solvents). These properties make ILs attractive candidates for various analyt...

Journal: :physical chemistry research 0
hemayat shekaari physical chemistry department, university of tabriz, tabriz, iran mohammed taghi zafarani-moattar university of tabriz seyyedeh narjes mirheydari university of tabriz

in recent years, ionic liquids have been used in pharmaceutical processes. therefore, having a deep insight into the ion association behavior of ionic liquids in the presence of a drug is of particular importance. so, in this work, the molar conductivities of the ionic liquids, 1-alkyl-3-methylimidazolium bromide, [cnmim]br (n = 4, 6 and 8) in various concentrations of aspirin (asa) in acetonit...

2016
Hugo F. D. Almeida Jose N. Canongia Lopes Luís P. N. Rebelo Joaõ A. P. Coutinho Mara G. Freire Isabel M. Marrucho

Density and dynamic viscosity data of binary mixtures of ionic liquids (ILs) were determined in this work, at temperatures from 283.15 to 363.15 K and at 0.1 MPa. The mixtures of two ILs comprise a common cation and different anions, combining 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide with eight other ionic liquids, namely, 1-butyl-3-methylimidazolium thiocyanate, 1-butyl-3m...

2010
S. Yamini Sudha Ashok Khanna

Owing to the stringent environmental legislations, CO2 capture and sequestration is one of the viable solutions to reduce the CO2 emissions from various sources. In this context, Ionic liquids (ILs) are being investigated as suitable absorption media for CO2 capture. Due to their non-evaporative, non-toxic, and non-corrosive nature, these ILs have the potential to replace the existing solvents ...

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