A Pseudo Hydronium Solvate Ionic Liquid and Taxonomy of the Allied Protic Media.

ABSTRACT: A ternary equimolar mixture of water, 18-crown-6-ether (18C6), and (+)-10-camphorsulfonic acid (CSA), [H₂O]/[18C6]/[CSA] = 1/1/1 by mole, has been prepared and characterized as a "pseudo hydronium solvate ionic liquid (IL)." In this system, 18C6-coordinated water is only partially protonated by CSA, resulting in a coexistence of 18C6-solvated hydronium (H₃O⁺) ions and neutral [H₂O·18C6] complexes. Unlike previously reported protic media formed with superacids, which undergo complete proton transfer to form solvate ILs, this system retains a significant fraction of neutral species due to the moderate ΔpK_a between CSA and water. Spectroscopic measurements including diffusion coefficient assessments reveal that proton transport proceeds v

SUBMITTER: Kitada A 

PROVIDER: S-EPMC12450038 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature