Analytical and Bioanalytical Chemistry

, Volume 405, Issue 27, pp 8935–8943 | Cite as

Chiral separation of racemic mandelic acids by use of an ionic liquid-mediated imprinted monolith with a metal ion as self-assembly pivot

  • Li-Hong Bai
  • Xiu-Xiu Chen
  • Yan-Ping Huang
  • Qing-Wei Zhang
  • Zhao-Sheng LiuEmail author
Research Paper


A new chiral stationary phase based on molecularly imprinted polymers (MIP) was prepared in ionic liquid by use of the metal pivot concept. Imprinted monoliths were synthesized by use of a mixture of R-mandelic acid (template), 4-vinylpyridine, ethylene glycol dimethacrylate, and several metal ions as pivot between the template and functional monomer. A ternary mixture of dimethyl sulfoxide–dimethylformamide–[BMIM]BF4 containing metal ions was used as the porogenic system. Separation of the enantiomers of rac-mandelic acid was successfully achieved on the MIP thus obtained, with resolution of 1.87, whereas no enantiomer separation was observed on the imprinted monolithic column in the absence of metal ions. The effects of polymerization conditions, including the nature of the metal ion and the ratios of template to metal ions and template to functional monomer, on the chiral separation of mandelic acid were investigated. The results reveal that use of metal ions as a pivot, in combination with ionic liquid, is an effective method for preparation of a highly efficient MIP stationary phase for chiral separation.


A new chiral stationary phase based on molecularly imprinted polymers (MIP) was prepared in ionic liquid by use of the metal pivot concept


R-Mandelic acid Monolith Molecularly imprinted polymers Chiral separation Metal ion Pivot 



This work was supported by the Hundreds Talents Program of the Chinese Academy of Sciences and supported by the National Natural Science Foundation of China (grant no. 21375096).

Supplementary material

216_2013_7304_MOESM1_ESM.pdf (224 kb)
ESM 1 (PDF 223 kb)


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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Li-Hong Bai
    • 1
  • Xiu-Xiu Chen
    • 1
  • Yan-Ping Huang
    • 1
  • Qing-Wei Zhang
    • 1
  • Zhao-Sheng Liu
    • 1
    Email author
  1. 1.Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics (Theranostics), School of PharmacyTianjin Medical UniversityTianjinChina

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