Azepanium ionic liquids

Belhocine, Tayeb; Forsyth, Stewart A.; Gunaratne, H. Q. Nimal; Nieuwenhuyzen, Mark; Nockemann, Peter; Puga, Alberto V.; Seddon, Kenneth R.; Сринивасан, Г.; Whiston, Keith

doi:10.1039/c1gc15189d

Cited by 45 publications

(46 citation statements)

References 70 publications

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“…The interest of room temperature ionic liquids, RTILs, relies on their unique properties such as stability at high temperatures, negligible vapour pressure, nonflammability, wide electrochemical window, and wide liquid ranges [3][4][5][6][7][8] . The interest of room temperature ionic liquids, RTILs, relies on their unique properties such as stability at high temperatures, negligible vapour pressure, nonflammability, wide electrochemical window, and wide liquid ranges [3][4][5][6][7][8] .…”

Section: Introductionmentioning

confidence: 99%

Alcohols as molecular probes in ionic liquids: evidence for nanostructuration

Vaz

Bhattacharjee

Rocha

et al. 2016

Phys. Chem. Chem. Phys.

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A comprehensive study of the solution and solvation of linear alcohols (propan-1-ol, butan-1-ol and pentan-1-ol) in ionic liquids (ILs) is presented. The effect of the alkyl chain size of both alcohols and ILs (1-alkyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide, [CnC1im][NTf2], ionic liquid series) on the thermodynamic properties of solution and solvation was used to obtain insight into the interactions between alcohols and ILs. Alcohols were used as molecular probes to ascertain whether their solvation in ILs would reflect IL nanostructuration. A trend shift was found in the values of enthalpy of solution and solvation for the [CnC1im][NTf2] series at a critical alkyl size (CAS) of C6. Further, the effect of the hydrogen bond basicity of the anion in the solvation of alcohols was explored based on the comparative study of the solvation of propan-1-ol in two different IL series, 1-alkyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide [CnC1im][NTf2] and hexafluorophosphate [CnC1im][PF6]. The results obtained provide experimental support for the strength of hydrogen bonds between the alcohols and the NTf2 and PF6 anions, providing insights into the IL intermolecular interactions, namely by indicating the ability of the alcohols to discriminate the IL anion hydrogen bond basicity.

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Section: Introductionmentioning

confidence: 99%

Alcohols as molecular probes in ionic liquids: evidence for nanostructuration

Vaz

Bhattacharjee

Rocha

et al. 2016

Phys. Chem. Chem. Phys.

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“…The same conductivity increase trend was observed for ether-functionalized ILs based on imidazolium cations [ 38 ], pyrrolidinium, piperidinium, oxazolidinium, or morpholinium cations [ 24 ], phosphonium and ammonium cations [ 25 , 51 , 52 ], as well as guanidinium cations [ 53 , 54 ]. Belhocine et al [ 55 ] prepared a series of seven-member ring azepanium-based ILs (Scheme 8.1 ) and found the incorporation of alkoxyalkyl group results in a reduction in viscosities and an increase in conductivities. In addition, cyclic voltammetry indicated very wide electrochemical windows (5.0-6.5 V) of azepanium ILs, implying their high potential as electrolytes.…”

Section: Electrochemical Propertiesmentioning

confidence: 99%

Task-Specific Ionic Liquids for Electrochemical Applications

Zhao

2015

Electrochemistry in Ionic Liquids

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Ionic liquids (ILs) have been widely examined as solvents, additives, or catalysts in a variety of applications including organic catalysis [ 1 -5 ], inorganic and materials synthesis [ 6 ], biocatalysis [ 7 -12 ], electrochemistry [ 13 ], pharmaceutical chemistry [ 14 ], polymerization [ 15 , 16 ], and engineering fl uids [ 17 -19 ]. The physicochemical properties of ILs are tunable through a careful selection of a variety of different cations and anions and a rational combination of ion pairs. More interestingly, cations and/or anions can be further functionalized to form so-called task-specifi c ionic liquids (TSILs). The notion of TSILs carrying specifi c functionality tailored for particular applications has proven visionary, and a variety of different functional groups have been grafted onto ILs [ 20 -22 ]. In particular, there is an exponential growth in constructing new TSILs as electrolytes for electrochemical applications. This chapter focuses on a critical discussion of some major types of TSILs and their electrochemical properties and applications. Ether/Thioether-and Hydroxyl/Thiol-Functionalized ILs General Physical PropertiesOur recent review has captured some key physical properties of ether-and alcoholfunctionalized ILs [ 22 ]. The inclusion of alkyloxy or alkyloxyalkyl groups in ILs often lowers the melting points ( T m ) [ 23 -26 ]. Additionally, the lowering of the

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“…Despite the claims on high electrochemical stability of ILs, industrial applications of ILs in ECs are still limited, due to their relatively high viscosity, low conductivity at room temperature, and high cost. Therefore, recently, a by-product of the polyamide industry (Azepane compound) was used for the synthesis of Azp 14 TFSI and Azp 16 TFSI [76]. However, the large cation size of this new class of electrolyte results in higher viscosity and lower conductivity as compared to Pyr 14 TFSI and still requires further study on their potentials as electrolytes for EDLCs [77].…”

Section: Electrolytes For Electrical Double-layer Capacitorsmentioning

confidence: 99%