authors |
Martins, MAR; Vilas-Boas, SM; Cordova, IW; Carvalho, PJ; Domanska, U; Ferreira, O; Coutinho, JAP; Pinho, SP |
nationality |
International |
journal |
JOURNAL OF CHEMICAL AND ENGINEERING DATA |
keywords |
2ND VIRIAL-COEFFICIENTS; ORGANIC SOLUTES; CHROMATOGRAPHY; MIXTURES; THERMODYNAMICS; HYDROCARBONS; ALCOHOLS; WATER; TEMPERATURE; TRANSITION |
abstract |
Inverse gas chromatography was used to obtain the activity coefficients at infinite dilution (gamma(infinity)(13)) of several organic solutes and water in the thermotropic ionic liquid crystal phases of both [C(12)mim][BF4] and [C(14)mim][BF4] and their isotropic phases. In the smectic to isotropic transition, a change in the linear representation of the natural logarithm of gamma(infinity)(13) with the reciprocal temperature was observed for [C(14)mim][BF4], and was more evident for alkanes, alkylbenzenes, esters, and alcohols, that can be related to structural modifications of the stationary phase. Results are interpreted in terms of the enthalpic and entropic contributions of solute-IL interactions. Selectivities and capacities of important separation problems, such as octane/benzene and cyclohexane/benzene, were calculated and compared with literature values for separating agents such as N-methyl-2-pyrrolidinone, sulfolane, and ionic liquids presenting the [BF4](-) anion combined with several imidazolium-based cations. It is shown that to achieve maximum separation efficiency, imidazolium cations with short alkyl chain lengths such as [C(2)mim][BF4] should be used, whereas high capacities require larger alkyl chain lengths. |
publisher |
AMER CHEMICAL SOC |
issn |
0021-9568 |
isbn |
1520-5134 |
year published |
2021 |
volume |
66 |
issue |
6 |
beginning page |
2587 |
ending page |
2596 |
digital object identifier (doi) |
10.1021/acs.jced.1c00182 |
web of science category |
10 |
subject category |
Thermodynamics; Chemistry, Multidisciplinary; Engineering, Chemical |
unique article identifier |
WOS:000662181900025
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ciceco authors
impact metrics
journal analysis (jcr 2019):
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journal impact factor |
2.369 |
5 year journal impact factor |
2.503 |
category normalized journal impact factor percentile |
53.135 |
dimensions (citation analysis):
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altmetrics (social interaction):
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