نتایج جستجو برای: mean ionic activity coefficient

تعداد نتایج: 1845649  

Journal: :journal of the iranian chemical research 0
ming lu chemical engineering college, nanjing university of sciece & technology, nanjing 210094, china xiaobing liu chemical engineering college, nanjing university of sciece & technology, nanjing 210094, china yu wang chemical engineering college, nanjing university of sciece & technology, nanjing 210094, china

an efficient protocol for the selective oxidation of primary alcohols to aldehydes withh5io6/v2o5 in ionic liquid [bmpy][pf6] has been developed. high yields of the products, mildreaction conditions and simple experimental procedure make this protocol complementary tothe existing methods. the catalyst can be reused for several times without obvious loss of thecatalytic activity.

Journal: :Journal of neurology, neurosurgery, and psychiatry 1981
V Glover R Peatfield R Zammit-Pace J Littlewood M Gawel F C Rose M Sandler

Mean platelet monoamine oxidase activity was reduced compared with control values in groups of headache-free male (but not female) patients suffering from classical migraine and from tension headache. Mean activity in male cluster patients, headache free, both during acute and quiescent phases of their illness, was also notably reduced. Retesting some migraine subjects after up to four years, s...

Journal: :The journal of physical chemistry. B 2008
Alasdair W Taylor Fulian Qiu Jingping Hu Peter Licence Darren A Walsh

The electrochemical behavior of a redox-active, ferrocene-modified ionic liquid (1-ferrocenylmethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide) in acetonitrile and in an ionic liquid electrolyte (1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide) is reported. Reversible electrochemical behavior was observed in each electrolyte with responses typical of those for unmodifie...

Journal: :Micromachines 2015
Leili Batooli Sandra Guadalupe Maldonado Moshe Judelewicz Stefano Mischler

Tribology of SU-8 polymer is increasingly relevant due to bursting use of this material in a variety of applications. This study is directed towards introduction and investigation of a novel self-lubricating composite of an ionic liquid (IL) in SU-8. The new material can be utilized for fabrication of lubricating polymer coating with tunable surface properties or SU8-made elements for microelec...

Journal: :Physical chemistry chemical physics : PCCP 2010
Fulian Qiu Alasdair W Taylor Shuang Men Ignacio J Villar-Garcia Peter Licence

Ultra high vacuum-spectroelectrochemistry was used to investigate the electrochemically generated Cu species in the ionic liquid (N-methylacetate)-4-picolinium bis(trisfluoromethylsulfonyl)imide, [MAP][Tf(2)N]. The diffusion of Cu(+) across the surface of the ionic liquid was monitored in situ by X-ray photoelectron spectroscopy (XPS). A numerical procedure was developed to simulate the surface...

Bijan Mombeni Goodajdar, Maryam Keshtibanian

In this study, a novel acidic magnetic dicationic ionic liquid was prepared in three steps to serve as a green  catalyst  in  organic  synthesis.  The  newly  synthesized  catalyst  was  characterized UV- VIS,  and  VSM  analysis.  Additionally,  the  decomposition  steps  acatalyst  were investigated by thermal  analysis  techniques  (TGA/DSC).  The  synthesized  acidic magnetic dication...

2013
Fausto Martelli Sacha Abadie Jean-Pierre Simonin Rodolphe Vuilleumier Riccardo Spezia

By using polarizable molecular dynamics (MD) simulations of lanthanoid(III) and actinoid(III) ions in water, we obtained ionic diffusion coefficients and hydration enthalpies for both series. These values are in good agreement with experiments. Simulations thus allow us to relate them to microscopic structure. In particular, across the series the diffusion coefficients decrease, reflecting the ...

2007
Chunsheng Wang Jian Hong

The Li+ ion diffusion coefficient of lithium iron phosphate LiFePO4 cathode materials should not be measured by the standard method because there is no composition variation but the movement of the LiFePO4/FePO4 interface during Li insertion/ extraction. A method to measure the intrinsic electronic and ionic conductivity of mixed conductive LiFePO4 was reported, for the first time, based on the...

2012
J. A. Lazzús

A thermodynamic modeling for the vapor–liquid equilibrium of binary systems of supercritical fluids and ionic liquids is presented. The van der Waals mixing rules and a cubic equation of state are used to evaluate the fugacity coefficient on the systems. Then, a particle swarm algorithm was used to minimize the difference between calculated and experimental bubble pressure, and calculate the in...

Journal: :Soft matter 2014
Kyriakos A Eslahian Arghya Majee Michael Maskos Alois Würger

We study the Soret effect of charged polystyrene particles as a function of temperature and electrolyte composition. As a main result we find that the Soret coefficient is determined by charge effects, and that non-ionic contributions are small. In view of the well-known electric-double layer interactions, our thermal field-flow fractionation data lead us to the conclusion that the Soret effect...

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