Time-Resolved Study of Light-Induced Ground-State Proton Transfer from an Acidic Medium to 4‑Nitrophenolate.

ABSTRACT: This work investigates the transient laser-induced formation of 4-nitrophenolate in the ground electronic state and its subsequent proton transfer with acetic acid and water. Laser flash photolysis in the UV-vis region revealed the presence of a deprotonated transient species even at weakly acidic pH. We measured the photoinitiated ground state protonation and deprotonation rate constants of 4-NPO^-/4-NPOH as a function of acetic acid, pH, and temperature. This study demonstrates a simple approach to analyzing fast competing bimolecular proton transfer reactions under nonequilibrium conditions in the ground state.

SUBMITTER: Scorsin L 

PROVIDER: S-EPMC12464748 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature