The Bronsted definition defines an acid as a solution with proton donors, and a base as a solution with proton acceptors. Consider the example of hydrofluoric acid.

Research into gas-phase Brønsted acids has yielded profound insights into proton donation processes devoid of solvation effects, allowing chemists to probe intrinsic acid strengths.

American Chemical Society: Chemistry for Life. This week’s molecules combine to make “magic”. The first, fluorosulfuric acid (HSO 3 F; also called fluorosulfonic acid) is an extremely strong Brønsted ...

Light burns with new acids. Nara Institute of Science and Technology. Journal Journal of the American Chemical Society DOI 10.1021/jacs.9b11821 ...

It is a strong bronsted acid, one which releases proton very easily, that ionises and induces chainlysis in the hydrocarbon thereby dissolving it as Tertiary Butyl Cation.

Moreover, proposals for novel organic Brønsted acids, featuring conjugated systems and stabilised conjugate bases, have shown promising potential in rivaling conventional acid benchmarks in gas ...