نتایج جستجو برای: ionic liquids

تعداد نتایج: 60626  

Journal: :Journal of chromatographic science 2009
J Zheng K H Row

In this study, the use of ionic liquids as additives in the separation of 2-chlorophenol and 2,4,6-trichlorophenol in reversed-phase high-performance liquid chromatography is reported. The ionic liquids used were 1-butyl-3-methylimidazolium tetrafluoroborate, 1-ethyl-3-methylimidazolium tetrafluoroborate, 1-ethyl-3-methylimidazolium methylsulfate ([EMIm][MS]), and 1-octyl-3-methylimidazolium me...

Journal: :Physical chemistry chemical physics : PCCP 2009
Koichi Fumino Alexander Wulf Ralf Ludwig

Cohesion energies determine the phase behavior of materials. The understanding of interaction energies is in particular interesting for ionic liquids. Here we show experimentally that, in accord with theoretical work, the intermolecular cation-anion interactions in ionic liquids can be detected by far FTIR spectroscopy. The measured vibrational bands of aprotic and protic ionic liquids in the l...

2017

We designed a coarse-grained model for aromatic ionic liquids [CnMIM [Tf2N −] with cations containing different alkyl groups. Within the framework of correlation-corrected density functional theory, the interfacial structure of studied ionic liquids are compared over a range of surface charge densities, alkyl chain lengths and surface geometries. The nonpolar hydrocarbon chains on cation tend t...

Journal: :Molecules 2009
Ichiro Minami

Current research on room-temperature ionic liquids as lubricants is described. Ionic liquids possess excellent properties such as non-volatility, non-flammability, and thermo-oxidative stability. The potential use of ionic liquids as lubricants was first proposed in 2001 and approximately 70 articles pertaining to fundamental research on ionic liquids have been published through May 2009. A lar...

2014
Eero Salminen Pasi Virtanen Jyri-Pekka Mikkola

The challenge in preparation of ionic liquids containing a strong alkaline anion is to identify a suitable cation which can tolerate the harsh conditions induced by the anion. In this study, a commercial quaternary ammonium compound (quat) benzalkonium [ADBA] (alkyldimethylbenzylammonium) was used as a cation in the synthesis of different alkaline ionic liquids. In fact, the precursor, benzalko...

Journal: :Physical chemistry chemical physics : PCCP 2011
Ignacio J Villar-Garcia Emily F Smith Alasdair W Taylor Fulian Qiu Kevin R J Lovelock Robert G Jones Peter Licence

Ionic liquid surfaces can become electrically charged during X-ray photoelectron spectroscopy experiments, due to the flux of photoelectrons leaving the surface. This causes a shift in the measured binding energies of X-ray photoelectron peaks that depends on the magnitude of the surface charging. Consequently, a charge correction method is required for ionic liquids. Here we demonstrate the na...

Journal: :iranian journal of catalysis 2014
ziba tavakoli elnaz ghasemi issa yavari

ionic liquids such as 1,3-dialkylimidazolium salts make excellent catalysts and solvents for synthesis of dialkyl 2-(dialkoxyphosphoryl)-3-(1-oxo-1-h-phthalazin-2-yl)succinates from 2h-phthalazin-1-one, dialkyl acetylenedicarboxylates, and trialkyl phosphites. under similar conditions, triphenyl phosphite led to dialkyl 2-(diphenoxyphosphoryl)-3-(1-oxo-1-h-phthalazin-2-yl)succinates. the ionic ...

Journal: :The journal of physical chemistry. B 2012
M B Oliveira M Domínguez-Pérez M G Freire F Llovell O Cabeza J A Lopes-da-Silva L F Vega J A P Coutinho

Ionic liquids have attracted a large amount of interest in the past few years. One approach to better understand their peculiar nature and characteristics is through the analysis of their surface properties. Some research has provided novel information on the organization of pure ionic liquids at the vapor-liquid interface; yet, a systematic study on the surface properties of mixtures of ionic ...

Journal: :Physical chemistry chemical physics : PCCP 2016
Amol Baliram Patil Bhalchandra Mahadeo Bhanage

Room temperature ionic liquids (ILs), especially protic ionic liquids (PILs), are used in many areas of the chemical sciences. Ionicity, the extent of proton transfer, is a key parameter which determines many physicochemical properties and in turn the suitability of PILs for various applications. The spectrum of computational chemistry techniques applied to investigate ionic liquids includes cl...

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