1H-Pyrrole-1-propionic acid (COOH-Py) is a pyrrole (Py) derivative that acts as a conductive polymer with an acid functional group that gives an anionic character to the polymeric films. It can be prepared by the hydrolysis of 1-(2-cyanoethyl)pyrrole.
COOH-Py forms multi-layered films with gold nanoparticles and nickel oxide, that can be used in biosensor applications. It may also be used in photoacoustic imaging based photothermal therapy. It can also form electropolymerized thin films that find applications as microsensor electrode arrays.