Synthesis and properties of symmetrical N,N′-bis(alkyl)imidazolium bromotrichloroferrate(III) paramagnetic, room temperature ionic liquids with high short-term thermal stability
| Autor: | Neil D. Redeker, Nicolas G. Hall, Kamran B. Ghiassi, Andrew J. Guenthner, Kevin T Greeson, Tammy C. Le, Laina V. Gilmore, Jerry A. Boatz, Jacob C. Marcischak, Jeffrey R. Alston |
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| Rok vydání: | 2018 |
| Předmět: |
chemistry.chemical_classification
Thermogravimetric analysis Materials science 02 engineering and technology Crystal structure 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Magnetic susceptibility Atomic and Molecular Physics and Optics 0104 chemical sciences Electronic Optical and Magnetic Materials chemistry.chemical_compound Differential scanning calorimetry chemistry Ionic liquid Materials Chemistry Melting point Physical chemistry Thermal stability Physical and Theoretical Chemistry 0210 nano-technology Spectroscopy Alkyl |
| Zdroj: | Journal of Molecular Liquids. 265:701-710 |
| ISSN: | 0167-7322 |
| Popis: | A series of paramagnetic ionic liquids (PILs) based on N,N′-bis(alkyl)imidazolium bromotrichloroferrate(III), [(Cn)2Im][FeCl3Br] (Im = imidazole; Cn = ethyl, butyl, hexyl, octyl, decyl, dodecyl), was prepared and compared against the more traditional [CnC1Im][FeCl3Br] (C1 = methyl) analogs. Both series were extensively characterized by physical, chemical, and computational methods including differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), spectroscopy (FTIR and UV‐vis-NIR), magnetic susceptibility, surface tensiometry, density, and viscosity. The X-ray crystal structure of [(C12)2Im][FeCl3Br] was also obtained. Notably, all ionic liquids prepared in this study show short-term thermal stabilities exceeding 300 °C in air and have melting points equal to or lower than 25 °C, which is surprisingly low for ionic liquids containing symmetrical cations. In addition, all presented ionic liquids have relatively low viscosities allowing for easier transitioning into applications. Physical property trends are discussed. |
| Databáze: | OpenAIRE |
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