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Citation: WANG Wei-Chao, WU Lin-Bo, LI Bo-Geng, HUANG Yuan. Synthesis and Physical Properties of 1-Alkyl-3 methylimidazolium L-Lactates[J]. Chinese Journal of Applied Chemistry, ;2007, 24(4): 378-382. shu

Synthesis and Physical Properties of 1-Alkyl-3 methylimidazolium L-Lactates

1.
State Key Laboratory of Polymer Reaction Engineering, Department of Chemical and Biochemical Engineering, Zhejiang University, Hangzhou 310027

Corresponding author: WU Lin-Bo,
Received Date: 28 May 2006
Available Online: 28 September 2006
Fund Project: 国家自然科学基金(20406018,20304012) (20406018,20304012)浙江省自然科学基金(Y404084)资助项目 (Y404084)

Four ionic liquids(ILs),namely,1-alkyl-3-methylimidazolium L-lactates(alkyl includes ethyl,butyl,hexyl and octyl),were synthesized via a metathesis reaction of silver L-lactate with corresponding 1-alkyl-3-methylimidazolium bromides and characterized by ¹H NMR and FT-IR spectra.The physical properties including optical rotation,solubility,density,viscosity,thermal decomposition temperature were meased and reported for the first time.The 1-alkyl-3-methylimidazolium L-lactates are highly optical active chiral ILs,possessing optical purity over 96%ee.The optical rotation of the compounds results from the chiral lactate anions.Their solubility depends on the solubility parameters of the solvents,and they are easy to dissolve in solvents with higher solubility parameter than themselves.They are stable at temperatures lower than 240℃ and behave as Newtonian fluids.Quantitative temperature-dependences of density and viscosity have been obtained.Their solubility,density and viscosity can be finely modified by changing the size of the substituent on the cation.
- ionic liquid,
- chiral ionic liquid,
- alkylmethylimidazolium L-lactate
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