Interesting viscosity changes in the aqueous urea-ionic liquid system: Effect of alkyl chain length attached to the cationic ring of an ionic liquid

Raju Nanda; Gitanjali Rai; Anil Kumar

doi:10.1007/s10953-015-0320-6

Interesting viscosity changes in the aqueous urea-ionic liquid system: Effect of alkyl chain length attached to the cationic ring of an ionic liquid

Raju Nanda, Gitanjali Rai, Anil Kumar

CSIR - National Chemical Laboratory

Research output: Contribution to journal › Article › peer-review

24 Scopus citations

Abstract

Abstract In the present article, we demonstrate the effect of urea on the structure of the ionic liquids in their aqueous solutions through viscometric methods. We unravel the structure altering effect of urea in its aqueous solutions of ionic liquids possessing higher alkyl chains. The finding is an attempt to discern the anomalous behavior of urea as shown in the past with the help of many techniques. Interestingly, in the aqueous solutions of the imidazolium based ionic liquids having substitution of -C₄H₉ and -C₆H₁₃ groups on the imidazolium ring, urea exhibits kosmotropic behavior. Further increase in the substituted alkyl group such as -C₈H₁₇ alters the urea behavior to be chaotropic.

Original language	English
Article number	320
Pages (from-to)	742-753
Number of pages	12
Journal	Journal of Solution Chemistry
Volume	44
Issue number	3-4
DOIs	https://doi.org/10.1007/s10953-015-0320-6
State	Published - 1 Apr 2015
Externally published	Yes

Bibliographical note

Publisher Copyright:
© Springer Science+Business Media New York 2015.

Funding

RN acknowledges the CSIR, New Delhi, for awarding a research fellowship. Both GR and AK thank DST, New Delhi for supporting this research through a J. C. Bose National Fellowship (SR/S2/JCB-26/2009).

Funders	Funder number
Council of Scientific and Industrial Research
Department of Science and Technology, Ministry of Science and Technology
Department of Science and Technology, Ministry of Science and Technology, India	SR/S2/JCB-26/2009
Council of Scientific and Industrial Research, India

Keywords

Alkyl chain length
Ionic liquids
Structure-breaker
Structure-maker
Urea
Viscosity

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10.1007/s10953-015-0320-6

Cite this

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abstract = "Abstract In the present article, we demonstrate the effect of urea on the structure of the ionic liquids in their aqueous solutions through viscometric methods. We unravel the structure altering effect of urea in its aqueous solutions of ionic liquids possessing higher alkyl chains. The finding is an attempt to discern the anomalous behavior of urea as shown in the past with the help of many techniques. Interestingly, in the aqueous solutions of the imidazolium based ionic liquids having substitution of -C4H9 and -C6H13 groups on the imidazolium ring, urea exhibits kosmotropic behavior. Further increase in the substituted alkyl group such as -C8H17 alters the urea behavior to be chaotropic.",

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AB - Abstract In the present article, we demonstrate the effect of urea on the structure of the ionic liquids in their aqueous solutions through viscometric methods. We unravel the structure altering effect of urea in its aqueous solutions of ionic liquids possessing higher alkyl chains. The finding is an attempt to discern the anomalous behavior of urea as shown in the past with the help of many techniques. Interestingly, in the aqueous solutions of the imidazolium based ionic liquids having substitution of -C4H9 and -C6H13 groups on the imidazolium ring, urea exhibits kosmotropic behavior. Further increase in the substituted alkyl group such as -C8H17 alters the urea behavior to be chaotropic.

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Interesting viscosity changes in the aqueous urea-ionic liquid system: Effect of alkyl chain length attached to the cationic ring of an ionic liquid

Abstract

Bibliographical note

Funding

Keywords

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