Snehkrishn A. Chaubey, N. Patra, Roli Mishra
Sep 1, 2020
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Influential Citations
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Journal
Monatshefte für Chemie - Chemical Monthly
Abstract
A series of eight novel proline functionalized dipeptide imidazolium ionic liquids (DPILs), i.e. Boc-[Pro-Pro-EMIM], Boc-[Pro-Val-EMIM], Boc-[Pro-Ala-EMIM], Boc-[Pro-Phe-EMIM] containing [Cl] and [NTf2] anions were synthesized via a facile reaction of 2-chloroethylamine with four different dipeptides (Boc-Pro-Pro-OH, Boc-Pro-Val-OH, Boc-Pro-Ala-OH, and Boc-Pro-Phe-OH) followed by reaction with 1-methylimidazole and subsequent anion exchange. The synthesized ILs revealed similar characteristics of a conventional imidazolium ILs. The synthesized ILs were investigated by 1H NMR, 13C NMR, FT-IR, mass spectroscopy, TGA, and DSC. TGA revealed an improved thermal stability for NTf2 over chloride ion. DSC revealed a melting temperature less than 100 °C.