نتایج جستجو برای: liquids

تعداد نتایج: 21511  

2009
Ye Wang Minglei Tian Wentao Bi Kyung Ho Row

Ionic liquids, considered "green" chemicals, are widely used in many areas of analytical chemistry due to their unique properties. Recently, ionic liquids have been used as a kind of novel additive in separation and combined with silica to synthesize new stationary phase as separation media. This review will focus on the properties and mechanisms of ionic liquids and their potential application...

2004
A. Rajendran P. Neelamegam

A dielectric constant measurement setup has been developed to measure dielectric constant of liquids using AT89C55WD microcontroller. A modified operational amplifier based AC Schering Bridge network is used to compute capacitance and hence calculate dielectric constant of liquids. This instrument system permits recording of dielectric constant of liquids at various concentrations and temperatu...

Journal: :Dalton transactions 2008
Mikhail Gorlov Lars Kloo

The potential of room-temperature molten salts (ionic liquids) as solvents for electrolytes for dye-sensitized solar cells has been investigated during the last decade. The non-volatility, good solvent properties and high electrochemical stability of ionic liquids make them attractive solvents in contrast to volatile organic solvents. Despite this, the relatively high viscosity of ionic liquids...

Journal: :Chemical communications 2005
Yanfei Shen Yuanjian Zhang Qixian Zhang Li Niu Tianyan You Ari Ivaska

An all-purpose approach to immobilize ionic liquids onto solid supports is proposed by chemical grafting on a polyelectrolyte carrier.

Journal: :Chemical communications 2005
Jinghong Li Yanfei Shen Yuanjian Zhang Yang Liu

The electrochemical stability of self-assembled monolayers was greatly enhanced by using room-temperature ionic liquids as media.

Journal: :Chemical communications 2005
Peter Nockemann Eva Beurer Kris Driesen Rik Van Deun Kristof Van Hecke Luc Van Meervelt Koen Binnemans

A high quantum yield and an enhanced photostability was found for a europium(III) tetrakis(2-thenoyltrifluoroacetonate) complex after dissolving the complex in a weakly-coordinating imidazolium ionic liquid.

Journal: :Soft matter 2016
Artem M Rumyantsev Rustam A Gumerov Igor I Potemkin

We propose a mean-field theory and dissipative particle dynamics (DPD) simulations of swelling and collapse of a polymer microgel adsorbed at the interface of two immiscible liquids (A and B). The microgel reveals surface activity and lowers A-B interfacial tension. Attempting to occupy as large an interfacial area as possible, the microgel undergoes anisotropic deformation and adopts a flatten...

2017
Nan Zhao Johan Jacquemin Ryan Oozeerally Volkan Degirmenci

A modified UNIFAC−VISCO group contribution method was developed for the correlation and prediction of viscosity of ionic liquids as a function of temperature at 0.1 MPa. In this original approach, cations and anions were regarded as peculiar molecular groups. The significance of this approach comes from the ability to calculate the viscosity of mixtures of ionic liquids as well as pure ionic li...

2017
Tomohiro Miyata Fumihiko Uesugi Teruyasu Mizoguchi

Investigation of the local dynamic behavior of atoms and molecules in liquids is crucial for revealing the origin of macroscopic liquid properties. Therefore, direct imaging of single atoms to understand their motions in liquids is desirable. Ionic liquids have been studied for various applications, in which they are used as electrolytes or solvents. However, atomic-scale diffusion and relaxati...

2013
Wojciech Mrozik Christian Jungnickel Monika Paszkiewicz Piotr Stepnowski

With the constant development of new ionic liquids, the understanding of the chemical fate of these compounds also needs to be updated. To this effect, the interaction of a number of novel ionic liquids with soils was determined. Therefore, three novel headgroups (ammonium, phosphonium, or pyrrolidinium) with single or quaternary substitution were tested on a variety of soils with high-to-low o...

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