Microheterogeneity in imidazolium and piperidinium cation‐based ionic liquids: 1D and 2D NMR studies. (16th June 2017)

• Record Type: Journal Article
• Authors: Panja, Sumit Kumar; Saha, Satyen
• Other Names: Damodaran Krishnan guestEditor.
• Is Part Of: Magnetic resonance in chemistry. Volume 56:Number 2(2018)
• Page Start: 95
• Page End: 102
• Publication Date: 2017-06-16
• Subjects: ionic liquids -- microheterogeneity -- imidazolium -- piperidinium cation -- NOESY and HOESY; Nuclear magnetic resonance spectroscopy -- Periodicals; Chemistry, Organic -- Periodicals; Magnetic resonance -- Periodicals; 538.36
• DOI: 10.1002/mrc.4610
• Languages: English
• ISSNs: 0749-1581

Abstract

Abstract : Existence of microheterogeneity of imidazolium and piperidinium cation‐based ionic liquids (ILs) containing PF6 and NTf2 anions has been investigated by 1D and 2D NMR spectroscopy. 2D NMR (especially NOESY and HOESY) has been employed for studying the interactions present between cation and anion as well as the intermolecular interaction among cations. HOESY spectrum shows that fluorine of anion ( PF 6 − and NTf 2 − ) significantly interacts with proton of the cations. Combined results of HOESY and NOESY for imidazolium IL indicate that the PF 6 − and imidazolium cation are distributed in organized manner, resulting a heterogeneous environment in liquid state. We have also observed existence of heterogeneous environment for piperidinium cation‐based ILs which is different from imidazolium ILs. It appears that existence of microheterogeneity in IL is ubiquitous and therefore open up the ILs field to revisit. Copyright © 2017 John Wiley & Sons, Ltd. Abstract : Existence of microheterogeneity in imidazolium and piperidinium cation‐based ionic liquids (ILs) containing PF6 and NTf2 anions has been investigated with the help of HOESY and NOESY techniques and observed existence of different heterogeneous environment forpiperidinium and imidazolium cation‐based ILs.