نتایج جستجو برای: ionic liquids ils

تعداد نتایج: 63940  

Journal: :The journal of physical chemistry. B 2014
Anurag Prakash Sunda Vishal M Dhavale Sreekumar Kurungot Arun Venkatnathan

Ammonium-based benzyl-NX3 (X = methyl, ethyl) trifluoromethanesulfonate (TFA) ionic liquids (ILs) are low cost, nontoxic, thermally stable ion-conducting electrolytes in fuel cells and batteries. In the present study, we have characterized the structure and dynamics of these ILs using molecular dynamics (MD) simulations and ionic conductivity using electro-chemical impedance spectroscopy (EIS) ...

Journal: :Aiche Journal 2022

Abstract The SAFT‐γ Mie model is a recent version of statistical associating fluid theory (SAFT), which uses group contribution approach to obtain high‐quality equation state. In this work, is, for the first time, extended ionic liquids (ILs). calculated values agree well with experimental data one‐component, binary and ternary systems that contain ILs, thus indicating versatility accuracy exte...

2013
Yang Liu Caiyan Lu Stephen Twigg Mehdi Ghaffari Junhong Lin Nicholas Winograd Q. M. Zhang

The recent boom of energy storage and conversion devices, exploiting ionic liquids (ILs) to enhance the performance, requires an in-depth understanding of this new class of electrolytes in device operation conditions. One central question critical to device performance is how the mobile ions accumulate near charged electrodes. Here, we present the excess ion depth profiles of ILs in ionomer mem...

2018
Stella Nickerson Elizabeth Nofen Denzil Frost Lenore L. Dai

Ionic liquids (ILs) can be used to replace one or more phases in conventional oil/water emulsions including Pickering emulsions—surfactant-free emulsions which utilize nanoor micron-sized particles to stabilize the immiscible liquid-liquid interface. Due to the extreme tunability of both the ILs and particles used, the study of IL-based Pickering emulsions yields novel emulsion morphologies and...

Journal: :Langmuir : the ACS journal of surfaces and colloids 2013
Lang G Chen Harry Bermudez

The aggregation and interfacial behavior of mixtures of anionic (sodium dodecylsulfate, SDS) and cationic (dodecylammonium bromide, DTAB) surfactants were investigated. A room-temperature ionic liquid (IL) was explored as a solvent for the SDS/DTAB system and compared to water. The critical micelle concentration (cmc) and composition in mixed micelles were determined for both solvents. Our expe...

Journal: :Chemistry 2009
Renshun Xu Weiping Zhang Jing Guan Yunpeng Xu Lei Wang Huaijun Ma Zhijian Tian Xiuwen Han Liwu Lin Xinhe Bao

A combination of state-of-the art in situ one- and two-dimensional NMR spectroscopy and density functional theory (DFT) calculations have been employed for the first time to investigate the role of amines in the synthesis of aluminophosphate molecular sieves in ionic liquids (ILs). In situ rotating-frame nuclear Overhauser effect spectroscopy (ROESY) was used to demonstrate that the hybrid of i...

2014
Chunjian Zhao Zhicheng Lu Chunying Li Xin He Zhao Li Kunming Shi Lei Yang Yujie Fu Yuangang Zu

An ionic liquids based simultaneous ultrasonic and microwave assisted extraction (ILs-UMAE) method has been proposed for the extraction of rutin (RU), quercetin (QU), from velvetleaf leaves. The influential parameters of the ILs-UMAE were optimized by the single factor and the central composite design (CCD) experiments. A 2.00 M 1-butyl-3-methylimidazolium bromide ([C4mim]Br) was used as the ex...

Journal: :Physical chemistry chemical physics : PCCP 2013
Rajdeep Singh Payal Sundaram Balasubramanian

Binary mixtures of room temperature ionic liquids (IL) with a common cation were investigated using atomistic molecular dynamics (MD) simulations. Two different binary ILs, viz., [C4mim][PF6]-[C4mim][Cl] and [C4mim][PF6]-[C4mim][BF4], were studied with varying fractions of either anion. The coordination environment of an anion around the cation is altered in the presence of another type of anio...

2014
Vitaly V. Chaban Eudes Eterno Fileti

New ionic liquids (ILs) are continuously introduced involving an increasing number of organic and inorganic ions. Amino acid based ILs (AAILs) represent a specific interest due to their natural origin and, allegedly, low cost. We apply our recently developed force field for imidazolium-based AAILs to investigate structure properties in their aqueous solutions via molecular dynamics (MD) simulat...

2011
S. Studzińska M. Molíková P. Kosobucki P. Jandera B. Buszewski

The nature of ionic liquids (ILs) facilitates their analysis by ion chromatography which, unlike conventional high-performance liquid chromatography, enables analysis both of cations and anions. This paper describes a pioneering ion-chromatographic investigation of IL cations and statistical evaluation of quantitative structure-retention relationships with the objective of predicting the molecu...

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