Non-equilibrium protic and aprotic ionic liquids: Measuring the distance from the equilibrium state
| Autor: | Takahiro Takekiyo, Hiroaki Kishimura, Yukihiro Yoshimura, Hiroshi Abe, Nozomu Hamaya |
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| Rok vydání: | 2019 |
| Předmět: |
Phase transition
Thermodynamic equilibrium Chemistry 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Atomic and Molecular Physics and Optics 0104 chemical sciences Electronic Optical and Magnetic Materials law.invention Dipole chemistry.chemical_compound law Phase (matter) Ionic liquid Materials Chemistry Physical chemistry Ethylammonium nitrate Physical and Theoretical Chemistry Crystallization 0210 nano-technology Conformational isomerism Spectroscopy |
| Zdroj: | Journal of Molecular Liquids. 283:196-207 |
| ISSN: | 0167-7322 |
| DOI: | 10.1016/j.molliq.2019.03.002 |
| Popis: | The anomalous phase behaviors of ionic liquids (ILs) were examined under low temperature (LT) and high pressure (HP). Under LT condition, crystal polymorphs and multiple crystallization pathways could be found for protic IL ethylammonium nitrate ([EAN][NO3]). For 1-ethyl-3-methylimidazolium nitrate ([C2mim][NO3]), an aprotic IL, simple LT-crystallization behavior was observed. However, HP conditions produced complicated phase behaviors. The HP-inherent conformer of the C2mim+ cation governed the crystallization pathways. In the liquid state, a variety of complicated phase transitions were influenced by multiple passible non-equilibrium degree factors: charge (scalar), dipole moment (vector), conformations (topology), and proton (transfer/network). The non-equilibrium degrees of protic and aprotic ILs were described by various solid phases both at LT and HP. |
| Databáze: | OpenAIRE |
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