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Rotational diffusion of organic solutes in 1-methyl-3-octylimidazolium tetrafluoroborate-diethylene glycol mixtures: influence of organic solvent on the organized structure of the ionic liquid


, : Rotational diffusion of organic solutes in 1-methyl-3-octylimidazolium tetrafluoroborate-diethylene glycol mixtures: influence of organic solvent on the organized structure of the ionic liquid. Journal of Physical Chemistry. B 118(20): 5562-5569

Rotational diffusion of two structurally similar organic solutes, 9-phenylanthracene (9-PA) and rhodamine 110 (R110), has been investigated in 1-methyl-3-octylimidazolium tetrafluoroborate-diethylene glycol ([MOIM][BF4]-DEG) mixtures to understand the influence of organic solvent on the organized structure of the ionic liquid. The reorientation times (τ(r)) of nonpolar and charged solutes have been measured as a function of viscosity (η) by changing the temperature (T) as well as the composition of the ionic liquid-organic solvent mixture. These results when analyzed using the Stokes-Einstein-Debye (SED) hydrodynamic theory follow the relationship τ(r) = A(η/T)(n), where A is the ratio of hydrodynamic volume of the solute to Boltzmann constant. However, in neat [MOIM][BF4] and up to 0.4 mole fraction of DEG (x(DEG)), significant deviations from the SED hydrodynamic theory have been noticed with n being much less than unity. As x(DEG) is increased further, the parameters A and n increase considerably for both solutes, and their rotational diffusion follows the predictions of the SED hydrodynamic theory. It has also been observed that the trends in the variation of τ(r) with η/T for 9-PA and R110 are not similar. These observations have been rationalized by taking into consideration the organized structure of the ionic liquid, which gradually becomes homogeneous at the microscopic level with the addition of the organic solvent.

US$19.90

PMID: 24802052

DOI: 10.1021/jp5032459


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Kok, P.; Astrup, T., 1972: Differentiation between plasminogen activators by means of epsilon-aminocaproic acid. Thrombosis et Diathesis Haemorrhagica 27(1): 77-87

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Danilevskii, A.S., 1957: Photo-periodism as a factor in the formation of geographical races in insects. Entomologicheskoe Obozrenie, 36: 5-27

David, Stanislav., 2000: Dragonfly fauna Insecta Odonata of the Stiavnicke vrchy Mts Vazky Insecta Odonata Stiavnickych vrchu. Entomofauna Carpathica, 122: 25-31

Rodrigues, D.D.J.sus; D.S.uza, T.S.ares F.; Landgref Filho, P., 2003: Phyllomedusa sauvagii (painted-belly leaf frog). Physical combat. Herpetological Review 34(3): 232

Shen, M.C., 1982: One hundred and two cases of hemophilia A in Taiwan. II. Treatment, complications and personal and social problems. Taiwan Yi Xue Hui Za Zhi. Journal of the Formosan Medical Association 81(3): 364-379

Marshall, E., 1981: Reactor safety and the research budget. Science 214(4522): 766-768

Nelson, P.; Siegfried, J.; Howell, J., 1992: A simultaneous equations model of coffee brand pricing and advertising. This paper explores the relationship between a differentiated brand of coffee's market share and its price in the USA in the context of a model that recognizes the endogeneity of the brand's advertising behaviour and pricing decisions. T...

George, C.F., 1910: Note on the Larva of Ottonia conifera. Naturalist London, 118

Zimmet, P.Z.; Taft, P.; Ennis, G.C.; Sheath, J., 1970: Acid production in diabetic acidosis; a more rational approach to alkali replacement. The production of organic acids in severe diabetic acidosis was studied to determine the contribution of various acids and to reassess alkali requirements. In 11 patients the mean total concentration of determined organic acids was 16 mEq/l., whil...