I have read that the concept of Brønsted and Lowry is based on the fact that acid-base reactions involve the transfer of $\ce{H+}$ ions from one substance to another, and that an acid is a substance that donates a proton to another substance, but:
can a substance donate a proton without the proton getting accepted by another substance? So for example: $$\ce{AH -> A- + H+}$$ without reacting with another substance?
If yes: Is this a Brønsted-Lowry acid?