Recent advances in NMR spectroscopy of ionic liquids

Insights into cation–anion hydrogen bonding in mesogenic ionic liquids: an NMR study

“…1 For example, it has been shown that the temperature range of the smectic phase is strongly correlated with the HB ability of counterions. 14,45 In this context, the important finding is that strong HB previously proved in isotropic ILs is also preserved in the mesophase despite the layered assembly and the high molecular order. This strong HB network in the presence of the layered cation assembly is preserved due to the formation of “ionic sublayers” where anions can approach polar groups to form H-bonds.…”

Understanding of the interactions between azole-anion-based ionic liquids and 2-methyl-3-butyn-2-ol from the experimental perspective: the cage effect

“…S1 It is well-known that the aggregation of alkyl groups not only affects its rotational and viscous fluidity, but also affects its chemical environment and 1 H NMR chemical shifts (d). [53][54][55] Therefore, d of the alkyl groups of [P 66614 ] + of AILs + MBY mixtures as a function of x AIL are investigated, which have been reported in our previous work, but not focused on and discussed. 10 The results show that d of the terminal CH 3 and the adjacent CH 2 are almost unchanged with the increasing of x AIL (the variation range is within 0.005 ppm, which is close to the measurement accuracy 56 ), indicating that their electron density remains unchanged, which is attributed to these groups being far away from the positive and negative charge centers, and there are no obvious group crossover and charge overlap between them as x AIL increases.…”

Single‐Entity Electrochemical Detection of As‐Prepared Metallic and Dielectric Nanoparticle Stochastic Impacts in a Phosphonium Ionic Liquid

“…ILs have been shown to possess a supramolecular structure with contact ion pairs or aggregates of IL ions. [35][36][37][38] Indeed, Bryant et al recently proposed that ion aggregates act as templating regions for NP synthesis within ILs. [38] Herein, LiBH 4 NCs as well as Pt and Au NPs were prepared in a tetraalkylphosphonium IL, trihexyltetradecylphosphonium bis(trifluorosulfonyl)imide (P 66614 NTf 2 ).…”