Density, dynamic viscosity, excess properties and intermolecular interaction of triethylene glycol + N,N‑dimethylformamide binary mixture
| Autor: | Caixia Hao, Xiaoqing Yue, Long Zhao, Jianbin Zhang, Yujie Pang |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Hydrogen bond Analytical chemistry Partial molar property 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Mole fraction 01 natural sciences Atomic and Molecular Physics and Optics 0104 chemical sciences Electronic Optical and Magnetic Materials chemistry.chemical_compound Viscosity Molar volume chemistry Volume (thermodynamics) Materials Chemistry Proton NMR Physical and Theoretical Chemistry 0210 nano-technology Spectroscopy Triethylene glycol |
| Zdroj: | Journal of Molecular Liquids. 274:730-739 |
| ISSN: | 0167-7322 |
| DOI: | 10.1016/j.molliq.2018.11.027 |
| Popis: | The density (ρ) and dynamic viscosity (v) data of the N,N‑dimethylformamide (DMF) + triethylene glycol (TEG) binary mixtures were measured in the entire mole fraction at five equidistant temperatures from (293.15 to 318.15) K under atmospheric pressure. On the basis of ρ and v data, he apparent molar volume (Vφ,1 and Vφ,2), partial molar volume ( V 1 ¯ and V 2 ¯ ), excess molar volume (VmE), viscosity deviation (Δη), and excess volume expansivity rate (αE) values were calculated. In the whole molar fraction range, all the VmE values were negative and presented the minimum values at x1 ≈ 0.43. To explore intermolecular interaction between DMF and TEG, pure DMF, pure TEG and their mixtures were characterized by FTIR, UV–Vis, and 1H NMR technologies. The consequences suggested that hydrogen bond between hydroxyl H atoms of TEG and O atoms of DMF was formed as follows: (CH3)2N CH O⋯HO CH2 CH2 O CH2 CH2 O CH2 CH2 OH⋯O CH N(CH3)2. |
| Databáze: | OpenAIRE |
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