Ionic liquids with fluorinated block-oligomer tails: Influence of self-assembly on transport properties

Ganapatibhotla, Lalitha; Wu, Lin; Zheng, J. P.; Jia, Xiaoxu; Roy, D.; McLaughlin, John B.; Krishnan, Sitaraman

doi:10.1039/c1jm14526f

Cited by 32 publications

(36 citation statements)

References 48 publications

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“…These special interactions are in fact more important in the case of polar and associative solvent such as water than in the case of polar but non-associative solvent like the PC. We can then conclude that in ([Pyrr] As expected and shown in the Figure 6, the conductivity of each composition increases with the temperature [49]. where B  ,  0 and …”

supporting

confidence: 77%

Density, conductivity, viscosity, and excess properties of (pyrrolidinium nitrate-based Protic Ionic Liquid+propylene carbonate) binary mixture

Pires

Timperman

Jacquemin

et al. 2013

The Journal of Chemical Thermodynamics

110

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Density, , viscosity, , and conductivity, , measurements of binary mixtures containing the pyrrolidinium nitrate Protic Ionic Liquid (PIL) and propylene carbonate (PC), are determined at the atmospheric pressure as a function of the temperature from (283.15 to 353.15) K and within the whole composition range. The temperature dependence of both the viscosity and conductivity of each mixture exhibits a non-Arrhenius behaviour, but is correctly fitted by using the Vogel-Tamman-Fulcher (VTF) equation. In each case, the best-fit parameters, such as the pseudo activation energy, E a * and ideal glass transition temperature, T 0 are then extracted. The excess molar volumes V E , and viscosity deviations from the ideality,  , of each investigated mixture were then deduced from the experimental results, as well as, their apparent molar volumes, V  , thermal expansion coefficients  p , and excess Gibbs energies (G *E) of activation of viscous flow. The V E ,  p E ,  values are negative over the whole composition range for each studied temperature therein. According to the Walden rule, the ionicity of each mixture was then evaluated as a function of the temperature from (283.15 to 353.15) K and of the composition. Results have been then discussed in terms of molecular interactions and molecular structures in this binary mixture.

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supporting

confidence: 77%

Density, conductivity, viscosity, and excess properties of (pyrrolidinium nitrate-based Protic Ionic Liquid+propylene carbonate) binary mixture

Pires

Timperman

Jacquemin

et al. 2013

The Journal of Chemical Thermodynamics

110

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“…The second weight loss step, started at ~302 C, comprising a significant fraction of 77 wt%, could be assigned to chemical degradation of STIIL, and kept constant after 400 C. However, it should be noted that the maximum decomposition temperature (400 C) was much higher than that of reported PEG functionalized imidazolium ionic liquids [43,56] . Moreover, STIIL exhibited a soft gel state with a rather low fluidity at room temperature, that is, it is hard to flow out of an inverted tube, accompanying a viscosity as high as 19000 cP (Fig.…”

Section: Resultsmentioning

confidence: 99%

“…In particular, poly(ethylene glycol) (PEG) has been incorporated into cationic or anionic units to produce the ether-derivative ionic liquids, the inclusion of alkoxy moieties always affects the physicochemical properties of relevant products. For example, ionic liquids with a linear-PEG tail attached to the imidazolium ring had been reported by Krishnan et al [43] . The final products could self-assemble to form a solvent-free ionic gel without assistance, and had been tested to possess a potential application as an electrolyte in dye-sensitized solar cells.…”

Section: Introductionmentioning

confidence: 94%

Synthesis of poly(ethylene glycol) functionalized star-shaped tricationic imidazolium based ionic liquid

Zhang

Yin

et al. 2014

Chin J Polym Sci

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We report on the preparation of a well-defined star-shaped tricationic ionic liquid possessing three arms of poly(ethylene glycol) functionalized imidazolium rings. Remarkable solubility was found in most of the organic solvents we used. Thermogravimetric analysis (TGA) exhibited excellent thermal stability and two distinct decomposition temperatures were attributed to two kinds of chemical degradation. Differential scanning calorimetry (DSC) was further employed to investigate the thermal phase transitions, that three different signals (T g , T c , and T m ) were shown upon the second heating process. Moreover, CH 2 Cl 2 solution of the ionic liquid expressed an excitation-wavelength dependent fluorescence response, leading to the facile modulation of photoluminescence behavior. This work represents an example of utilizing molecular design to construct novel ionic liquids and endow further potential to be used in the engineering materials.

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“…We have synthesized and characterized an imidazolium iodide ionic liquid containing anperfluoroalkyl poly(ethylene glycol) (PEG) tail [1]. The solid phase of this material was accomplished through the generation of ionic clusters by electrostatic interactions, as well as through microphase separation of the immiscible perfluoroalkyl and PEG segments of the cation used.…”

Section: Summary Of Most Important Resultsmentioning

confidence: 99%

Novel Nanocomposite Materials for Solar Cell Fabrication

Krishnan¹,

McLaughlin²,

Roy³

2012

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The public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Problems studied:This project involves the synthesis and characterization of novel ionic liquid (IL) electrolytes for high-performance dye sensitized solar cells (DSSCs). Since most commonly used organic liquid electrolytes of DSSCs are volatile and flammable, they limit the long-term stability and high temperature operations of these cells. In our present This project involves the synthesis and characterization of novel ionic liquid (IL) electrolytes for high-performance dye sensitized solar cells (DSSCs). Since most commonly used organic liquid electrolytes of DSSCs are volatile and flammable, they limit the long-term stability and high temperature operations of these cells. In our present work, we have addressed these issues through the development of non-volatile, non-flammable and polymerizable IL electrolytes. Our IL characterization efforts have focused on thermo-physical and electrochemical properties that are relevant for DSSC-specific applications. Computer simulations have also been performed to understand the structural properties of the new electrolytes/nano-composite systems.

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Ionic liquids with fluorinated block-oligomer tails: Influence of self-assembly on transport properties

Cited by 32 publications

References 48 publications

Density, conductivity, viscosity, and excess properties of (pyrrolidinium nitrate-based Protic Ionic Liquid+propylene carbonate) binary mixture

Density, conductivity, viscosity, and excess properties of (pyrrolidinium nitrate-based Protic Ionic Liquid+propylene carbonate) binary mixture

Synthesis of poly(ethylene glycol) functionalized star-shaped tricationic imidazolium based ionic liquid

Novel Nanocomposite Materials for Solar Cell Fabrication

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