Ionic liquids of superior thermal stability. Validation of PPh₄ ⁺ as an organic cation of impressive thermodynamic durability.

ABSTRACT: Recent work by Wasserscheid, et al. suggests that PPh₄ ⁺ is an organic molecular ion of truly exceptional thermal stability. Herein we provide data that cements that conclusion: specifically, we show that aliphatic moieties of modified PPh₄ ⁺-based cations incorporating methyl, methylene, or methine C-H bonds burn away at high temperatures in the presence of oxygen, forming CO, CO₂, and water, leaving behind the parent ion PPh₄ ⁺. The latter then undergoes no further reaction, at least below 425 °C.

SUBMITTER: Soltani M 

PROVIDER: S-EPMC9054240 | biostudies-literature | 2020 May

REPOSITORIES: biostudies-literature