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NMR spectroscopy Monitoring

NMR spectroscopy Monitoring of H/D Exchange in Aqueous Solutions of Ionic Liquids Forming Hydrogen Bond A Role of Anions, Self-Aggregation, and Mesophase Formation. Vytautas Klimavičius Vytautas Balevičius Vilnius University, Faculty of Physics, Vilnius, Lithuania.

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NMR spectroscopy Monitoring

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  1. NMR spectroscopy Monitoring of H/D Exchange in Aqueous Solutions of Ionic Liquids Forming Hydrogen Bond A Role of Anions, Self-Aggregation, and Mesophase Formation Vytautas Klimavičius Vytautas Balevičius Vilnius University, Faculty of Physics, Vilnius, Lithuania

  2. An ionic liquid is a liquid that contains essentially only ions. In the broad sense – molten salts, however, the term "ionic liquid" is commonly used for salts whose melting points below 100 °C.

  3. 1-decyl-3-methylimidazolium chloride – [C10mim][Cl] 1-decyl-3-methylimidazolium bromide – [C10mim][Br] Inoue, T.; Dong, B.; Zheng, L. Q. J.ournal of Colloid andInterfaceScience, 307, 578 – 581 (2007)

  4. 10-4 mol.fr. Cl-/Br- 10-2 mol. fr./ 0,4 mol. fr. 0,4 mol.fr. [C10mim][Cl/Br] D2O no H/D exchange

  5. Cl/Br Cl-/Br- [C10mim][Cl] [C10mim][Br] Deuterium I=1 S=2nI+1=3 10-4 mol. fr. 10-2 mol. fr. 8–10 hours 2 days > 50 days 10-2 mol. fr. 0,25 ppm – 0,02 ppm

  6. In aqueous solutions with [C10mim][Cl/Br] H/D exchange is possible The H/D rate is dependant on concentrations and anion. No H/D exchange reactions in Liquid Ionogel phase. Vytautas Klimavicius, Zofia Gdaniec, Jonas Kausteklis, Valdemaras Aleksa, Kestutis Aidas, Vytautas Balevicius, NMR and Raman Spectroscopy Monitoring of Proton/Deuteron Exchange in Aqueous Solutions of Ionic Liquids Forming Hydrogen Bond: A Role of Anions, Self-Aggregation , and Mesophase Formation, The Journal of Physical Chemistry B 117, 10211 – 10220 (2013)

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