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Pentaglyme-K salt b...
Pentaglyme-K salt binary mixtures: phase behavior, solvate structures, and physicochemical properties
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- Mandai, Toshihiko, 1984 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Tsuzuki, S. (författare)
- National Institute of Advanced Industrial Science and Technology (AIST)
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- Ueno, K. (författare)
- Yokohama National University
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- Dokko, K. (författare)
- Kyoto University,Yokohama National University
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- Watanabe, M. (författare)
- Yokohama National University
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(creator_code:org_t)
- 2015
- 2015
- Engelska.
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Ingår i: Physical Chemistry Chemical Physics. - : Royal Society of Chemistry (RSC). - 1463-9084 .- 1463-9076. ; 17:4, s. 2838-2849
- Relaterad länk:
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http://dx.doi.org/10...
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https://research.cha...
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https://doi.org/10.1...
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Abstract
Ämnesord
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- We prepared a series of binary mixtures composed of certain K salts (KX) and pentaglyme (G5) with different salt concentrations and anionic species ([X](-) : [(CF3SO2)(2)N](-) = [TFSA](-), [CF3SO3](-) = [TfO](-), [C4F9SO3](-) = [NfO](-), PF6-, SCN-), and characterized them with respect to their phase diagrams, solvate structures, and physicochemical properties. Their phase diagrams and thermal stability strongly implied the formation of equimolar complexes. Single-crystal X-ray crystallography was performed on certain equimolar complexes, which revealed that G5 molecules coordinate to K+ cations in a characteristic manner, like 18-crown-6 ether in the crystalline state, irrespective of the paired anions. The solvate structures in the molten state were elucidated by a combination of temperature-dependent Raman spectroscopy and X-ray crystallography. A drastic spectral variation was observed in the [K(G5)(1)][TfO] Raman spectra, indicating that solvate structures in the crystalline state break apart upon melting. The solvate stability of [K(G5)(1)]X is closely related to the ion-ion interaction of the parent salts. A stable solvate forms when the ion-dipole interaction between K+ and G5 overwhelms the ion-ion interaction between K+ and X-. Furthermore, the physicochemical properties of certain equimolar mixtures were evaluated. A Walden plot clearly reflects the ionic nature of the molten equimolar complexes. Judging from the structural characteristics and dissociativity, we classified [K(G5)(1)]X into two groups, good and poor solvate ionic liquids.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Annan teknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Other Engineering and Technologies (hsv//eng)
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