NMR measurements in solutions of dialkylimidazolium haloaluminates

Conference · Mon Jun 01 04:00:00 EDT 1992

OSTI ID:7205788

Takahashi, S; Saboungi, M L; Klingler, R J; Chen, M J; Rathke, J W

{sup 27}Al and {sup 35}Cl NMR spectra of AlCl{sub 3}-1-ethyl-3-methyl imidazolium chloride (EMIC) melts were measured for initial compositions ranging from 50 to 67 mol % AlCl{sub 3} at various temperatures. It was shown by changing the preaquisition delay time (DE value) that the dominant aluminum species are AlCl{sub 4}{sup {minus}} in the melt formed by mixing 50 mol % with EMIC and Al{sub 2}Cl{sub 7}{sup {minus}} in the 67 mol % AlCl{sub 3} melt. In the equimolar mixture, the chemical shift of {sup 27}Al NMR spectrum is 103.28 ppm and the line width is 22.83Hz. In the 67 mol % AlCl{sub 3} mixture, the chemical shift is 103.41 ppm and the line width is 2624Hz. A third species observed at 97 ppm in the {sup 27}Al spectra for the 55 and 60 mol % AlCl{sub 3} mixtures is identified to be a product of the reaction with residual water. The relaxation rates for each species in the melts were determined.

• Research Organization: Argonne National Lab., IL (United States)
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 7205788
• Report Number(s): ANL/CP-75680; CONF-9205102--3; ON: DE92016777
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102 -- Chemical & Spectral Procedures
665100* -- Nuclear Techniques in Condensed Matter Physics -- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALUMINIUM 27
ALUMINIUM CHLORIDES
ALUMINIUM COMPOUNDS
ALUMINIUM ISOTOPES
AZOLES
CHLORIDES
CHLORINE 35
CHLORINE COMPOUNDS
CHLORINE ISOTOPES
HALIDES
HALOGEN COMPOUNDS
HETEROCYCLIC COMPOUNDS
IMIDAZOLES
ISOTOPES
LIGHT NUCLEI
MOLTEN SALTS
MULTIPOLES
NMR SPECTRA
NUCLEI
ODD-EVEN NUCLEI
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
QUADRUPOLES
RELAXATION
SALTS
SPECTRA
STABLE ISOTOPES