Density and viscosity behaviour of EBPBF4, TBPBF4 and HBPBF4 in acetonitrile solutions at different temperatures at T = (293.15–323.15) K
| Autor: | Dong-Gen Xiong, Jianxin Cai, Leiqiang Zhao, Jian Xu, Zhenyu Yang, Ji Yu, Ze Zhang |
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| Rok vydání: | 2021 |
| Předmět: |
Tetrafluoroborate
Thermodynamics 02 engineering and technology Activation energy Electrolyte Atmospheric temperature range 010402 general chemistry 01 natural sciences Atomic and Molecular Physics and Optics 0104 chemical sciences Gibbs free energy chemistry.chemical_compound symbols.namesake Viscosity Transition state theory 020401 chemical engineering chemistry Volume (thermodynamics) symbols General Materials Science 0204 chemical engineering Physical and Theoretical Chemistry |
| Zdroj: | The Journal of Chemical Thermodynamics. 158:106467 |
| ISSN: | 0021-9614 |
| Popis: | The thermodynamic properties of electrolyte solutions play a great role in super- capacitors. However, the related fundamental properties and rules for new electrolyte solution systems are still scarce. Herein, the densities and viscosities of ethyltributylphosphonium tetrafluoroborate (EBPBF4), tetrabutylphosphonium tetrafluoroborate (TBPBF4), and hexyltributylphosphonium tetrafluoroborate (HBPBF4) in acetonitrile (AN) solutions was measured at temperature range from 293.15 to 323.15 K at atmospheric pressure. The apparent molar volumes, limiting apparent molar volumes, viscosity B-coefficient and some important parameters were also calculated, and used to discuss to ion-ion and ion-solvent interaction in studied systems. The values of dB/dT in all studied solutions are negative indicating that hydrodynamic volume of ions is decreased by increasing temperature and indicating that all solutes as structure makers in AN medium. Furthermore, activation energy and the contributions of solute to the molar Gibbs energy of activation for the viscous flow of the solution are also discussed by Eyring transition state theory. These results will be helpful to further understand the ion-ion and ion-solvent interaction in new electrolyte systems and promote their design and commercial application. |
| Databáze: | OpenAIRE |
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