The effect of the alkyl chain length on physicochemical features of (ionic liquids +γ-butyrolactone) binary mixtures

Papović, Snežana; Bešter‐Rogač, Marija; Gadžurić, Slobodan

doi:10.1016/j.jct.2016.03.034

Cited by 42 publications

(22 citation statements)

References 82 publications

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“…Despite the fact that the IL is actually mixed with PO as co-binders for the preparation of the carbon paste, the previous trends correlate well with the conductivities and viscosities that the [ [38][39][40][41][42][43][44]. It is a wellknown fact that the conductivity and viscosity for many ILs are generally inversely related [51], thus the more viscous the ionic liquid, the lower the conductivity observed due to the decrease of the ion mobility [44,51].…”

Section: Effect Of Chain Length Of Alkyl Substituted Imidazolium Catimentioning

confidence: 83%

Effect of Ionic Liquid Structure on the Electrochemical Response of Dopamine at Room Temperature Ionic Liquid‐modified Carbon Paste Electrodes (IL–CPE)

2020

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In this work 12 different ionic liquids (ILs) have been used added as co‐binders in the preparation of modified carbon paste electrodes (IL–CPEs) used for the voltammetric analysis of dopamine in Britton‐Robinson buffer. The ionic liquids studied were selected based on three main criteria: (1) increasing chain length of alkyl substituents (studying 1‐ethylimidazolium and ethyl, propyl, butyl, hexyl and decylmethylimidazolium bis(trifluoromethylsulfonyl)imide ionic liquids); (2) nature of the counter ion (dicyanamide, bis(trifluoromethylsulfonyl)imide and hexafluorophosphate) in 1‐butyl‐3‐methylimidazolium ionic liquids; and (3) cation ring structures (1‐butyl‐3‐methylimidazolium, 1‐butyl‐1‐methylpiperidinium, 1‐butyl‐1‐methylpyrrolidinium and 1‐butyl‐3‐methylpyridinium) in bis(trifluoromethylsulfonyl)imide or hexafluorophosphate (1‐butyl‐3‐methylimidazolium or 1‐butyl‐3‐methylpyridinium as cations) ionic liquids. The use of IL as co‐binders in IL–CPE results in a general enhancement of both the sensitivity and the reversibility of dopamine oxidation. In square wave voltammetry experiments, the peak current increased up to a 400 % when 1‐ethyl‐3‐methylimidazolium bis(trifluoromethylsulfonyl)imide was used as co‐binder, as compared to the response found with the unmodified CPE. Experimental data provide evidence that electrostatic and steric effects are the most important ones vis‐à‐vis these electrocatalytic effects on the anodic oxidation of dopamine on IL–CPE. The relative hydrophilicity of dicyanamide anions reduced the electrocatalytic effects of the corresponding ionic liquids, while the use of 1‐ethyl‐3‐methylimidazolium hexafluorophosphate or 1‐ethyl‐3‐methylimidazolium bis(trifluoromethylsulfonyl)imide (two relatively small and highly hydrophobic ionic liquids) as co‐binders in IL–CPE resulted in the highest electrocatalytic activity among all of the IL–CPE studied.

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Section: Effect Of Chain Length Of Alkyl Substituted Imidazolium Catimentioning

confidence: 83%

Effect of Ionic Liquid Structure on the Electrochemical Response of Dopamine at Room Temperature Ionic Liquid‐modified Carbon Paste Electrodes (IL–CPE)

2020

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“…Whereas understanding the properties of pure ILs is of fundamental interest, the practical applications generally require the admixture of other compounds, acting either as a reactant or product or as a cosolvent required for process optimization. 10 Some earlier investigations [11][12][13][14] reveal that addition of an IL in an organic solvent enhances the electrochemical and thermal stability of IL/organic solvent binary mixtures which often reflects in higher electrical conductivity and better device performances at low temperature than comparable mixtures of salts with high melting point temperatures. 15 Recently, it has been demonstrated that ILs can serve as an excellent model system for investigating the influence of the ion structure on the mobility and ion pairing even in aqueous solutions, where the interionic interac-tions are weak.…”

Section: Ionic Liquids In Solutionsmentioning

confidence: 99%

“…Pure ILs are usually quite viscous and less conductive, whereas the mixing of ILs with molecular liquids (cosolvents) causes a significant decrease of viscosity and a sharp increase of conductivity. [11][12][13][14] A huge number of investigations on conductivity of mixtures of ILs with molecular solvents is available in the literature. Surprisingly, despite the large practical interest for such systems, systematic studies of the transport properties of binary mixtures of ILs and cosolvents in a broad concentration range -from diluted solutions to pure ILs -are still scarce.…”

Section: Ionic Liquids In Non-aqueous Solutionsmentioning

confidence: 99%

Ionic Liquids: Simple or Complex Electrolytes?

Bešter‐Rogač

2020

ACSi

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Ionic liquids belong to the most investigated systems in the recent years and this field is still significantly growing with an increased focus on developing ionic liquids for specific applications, along with fundamental research. In the present featured paper the similarity and differences between common, "classical" electrolytes and common surfactants and ionic liquids along with the surface-active ionic liquids are discussed in order to stress their significance and point out on their weak points. A short survey of the literature data reveals namely that ionic liquids in solutions behave like "classical" electrolytes and can be described by existing models in the range of their validity. There is still a lack of models describing well the concentrated electrolyte solutions and here ionic liquids, less limited by solubility as common electrolytes, can serve as model systems. The micellization of surface-active ionic liquids in aqueous solutions can be described in the same way as for common surfactants, but surface-active ionic liquids offer more possibilities to study specific ion and isomer effects. They are also quite promising systems to study the aggregation processes in non-aqueous solutions.

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“…Semakin panjang rantai alkil, maka viskositas akan semakin tinggi. Sifat hidrofobik/lipofilik cairan ion juga meningkat dengan semakin panjangnya rantai alkil (Papović, Bešter-Rogač, Vraneš, & Gadžurić, 2016). Sedangkan, jenis anion dapat menentukan sifat asam, basa atau netral suatu cairan ion.…”

Section: Cairan Ionunclassified

Dalam Situasi Covid-19 : Pengembangan Media Sisca Yang Terintegrasi Web Dan Berorientasi Gc Untuk Pembelajaran Sma-SMK

Naryono¹

2020

JPS Universitas Muhammadiyah Semarang

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The situation in the Covid-19 era was directed at every online integrated learning. The purpose of this research is to produce SISCA media that is integrated with web and oriented GC for high school and vocational high school learning. This type of quantitative research uses the Four-D (4D) model development method which is more focused on development. Samples were taken by purposive sampling and considered as research subjects, represented by high school and vocational high school students. The research instrument, in the form of a student response questionnaire, was used to collect data before and after learning. The analysis technique uses a Likert scale, and the results obtained using SISCA media on learning produce positive changes with an average difference for the three aspects that are responded to very significantly.

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The effect of the alkyl chain length on physicochemical features of (ionic liquids +γ-butyrolactone) binary mixtures

Cited by 42 publications

References 82 publications

Effect of Ionic Liquid Structure on the Electrochemical Response of Dopamine at Room Temperature Ionic Liquid‐modified Carbon Paste Electrodes (IL–CPE)

Effect of Ionic Liquid Structure on the Electrochemical Response of Dopamine at Room Temperature Ionic Liquid‐modified Carbon Paste Electrodes (IL–CPE)

Ionic Liquids: Simple or Complex Electrolytes?

Dalam Situasi Covid-19 : Pengembangan Media Sisca Yang Terintegrasi Web Dan Berorientasi Gc Untuk Pembelajaran Sma-SMK

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