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Solvatochromic Probes Absorbance Behavior in Mixtures of 2-Hydroxy ethyl ammonium formate with methanol, ethylene glycol and glycerol

Salari, H. (Hadi) ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1007/s10953-010-9596-8
  3. Abstract:
  4. Solute-solvent and solvent-solvent interactions were investigated for binary mixtures of an ionic liquid (IL) 2-hydroxy ethylammonium formate as with methanol, ethylene glycol and glycerol. The physicochemical properties of the solvent mixtures at 25 °C, over the whole range of mole fractions, were determined using solvatochromic probes. High normal polarity ( ENT ) in the alcohol-rich region confirms solute-solvent interactions in this medium. Dipolarity/polarizability (π ∗) show a different trend to ENT with a positive deviation from ideal behavior in IL-glycerol mixtures. However, these deviations for other solvent mixtures are insignificant. Contrary to what is observed for ENT and π ∗, hydrogen-bond donor (HBD) acidity and hydrogen-bond acceptor (HBA) basicity demonstrate similar trends. The applicability of the combined nearly-ideal binary solvent/Redlich-Kister (CNIBS/R-K) equation for the correlation of various parameters provides a simple computational model to correlate and/or predict various solvatochromic parameters for many binary solvent systems
  5. Keywords:
  6. Lonic liquids ; Solvatochromic properties ; 2-Hydroxy ethylammonium formate ; Solute-solvent and solvent-solvent interactions
  7. Source: Journal of Solution Chemistry ; Volume 39, Issue 10 , October , 2010 , pp 1509-1519
  8. URL: http://link.springer.com/article/10.1007/s10953-010-9596-8