TY - JOUR

T1 - Effects of Zwitterions on Structural Anomalies in Ionic Liquid Glasses Studied by EPR

AU - Bakulina, Olga D

AU - Ivanov, Mikhail Yu

AU - Prikhod'ko, Sergey A

AU - Adonin, Nicolay Yu

AU - Fedin, Matvey V

N1 - Funding: This work is supported by the Russian Science Foundation (grant No. 19-13-00071-Π).

PY - 2023/8

Y1 - 2023/8

N2 - Ionic liquids (ILs) form a variety of nanostructures due to their amphiphilic nature. Recently, unusual structural phenomena have been found in glassy ILs near their glass transition temperatures; however, in all studied cases, IL cations and anions were in the form of separate moieties. In this work, we investigate for the first time such structural anomalies in zwitterionic IL glasses (ZILs), where the cation and anion are bound in a single molecule. Such binding reasonably restricts mutual diffusion of cations and anions, leading to modification of nano-ordering and character of structural anomalies in these glassy nanomaterials, as has been investigated using Electron Paramagnetic Resonance (EPR) spectroscopy. In particular, the occurrence of structural anomalies in ZIL glasses was revealed, and their characteristic temperatures were found to be higher compared to common ILs of a similar structure. Altogether, this work broadens the scope of structural anomalies in ionic liquid glasses and indicates new routes to tune their properties.

AB - Ionic liquids (ILs) form a variety of nanostructures due to their amphiphilic nature. Recently, unusual structural phenomena have been found in glassy ILs near their glass transition temperatures; however, in all studied cases, IL cations and anions were in the form of separate moieties. In this work, we investigate for the first time such structural anomalies in zwitterionic IL glasses (ZILs), where the cation and anion are bound in a single molecule. Such binding reasonably restricts mutual diffusion of cations and anions, leading to modification of nano-ordering and character of structural anomalies in these glassy nanomaterials, as has been investigated using Electron Paramagnetic Resonance (EPR) spectroscopy. In particular, the occurrence of structural anomalies in ZIL glasses was revealed, and their characteristic temperatures were found to be higher compared to common ILs of a similar structure. Altogether, this work broadens the scope of structural anomalies in ionic liquid glasses and indicates new routes to tune their properties.

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85167736968&origin=inward&txGid=ef9ccdf945e69aa125657af149a759a0

U2 - 10.3390/nano13152164

DO - 10.3390/nano13152164

M3 - Article

C2 - 37570482

VL - 13

JO - Nanomaterials

JF - Nanomaterials

SN - 2079-4991

IS - 15

M1 - 2164

ER -