کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6660636 | 1426232 | 2015 | 18 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of N,Nâ²-bis(2-pyridylmethylidene)-1,2-diiminoethane Schiff base (BPIE) on the thermodynamic properties of the ionic liquid 1-hexyl-3-methylimidazolium chloride in N,N-dimethylacetamide solvent at TÂ =Â 298.15Â K
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
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چکیده انگلیسی
Densities, viscosities, and refractive indices of ternary mixtures of ionic liquid 1-hexyl-3-methylimidazolium chloride ([HMIm]Cl) + Schiff base, N,Nâ²-bis(2-pyridylmethylidene)-1,2-diiminoethane (BPIE), a mixture of cis- and trans-isomers, + N,N-dimethylacetamide (DMA) were measured at T = 298.15 K. From the obtained data, apparent molar volumes (VÏ), corresponding experimental slopes (Sv), standard partial molar volumes (VÏ0), transfer volumes (ÎtVÏ0), viscosity B-coefficients, solvation numbers (Sn), and molar refractions (RD) were calculated and discussed on the basis of (solute + solvent), and (solute + cosolute) interactions. As stated by cosphere overlap model (Yan et al., 2009), the negative transfer volumes obtained here show the dominance of (polar + nonpolar) interactions between the polar group of BPIE and the nonpolar alkyl chain of [HMIm]Cl and (nonpolar + nonpolar) interactions between the nonpolar groups of BPIE and the alkyl chain of [HMIm]Cl. The values of solvation numbers (Sn) were obtained as Sn > 2.5 and decrease as the concentration of BPIE in the mixtures increases. The Sn > 2.5 means that the IL is solvated in the mixtures, but the decreasing the Sn values indicates that the solvation of the ions of the ionic liquid decreases at higher concentrations of the Schiff base.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: The Journal of Chemical Thermodynamics - Volume 81, February 2015, Pages 131-135
Journal: The Journal of Chemical Thermodynamics - Volume 81, February 2015, Pages 131-135
نویسندگان
Hemayat Shekaari, Amir Kazempour, Maryam Khoshalhan,