Two-Photon Absorption and Dynamics of Excited States in Bromochalcone Derivatives.

ABSTRACT: Two-photon absorption (2PA) in organic compounds has gained significant interest due to its applications in nonlinear optics, including two-photon fluorescence microscopy, photodynamic therapy, and laser microfabrication. This study investigates the two-photon absorption cross section (2PACS) and the excited-state dynamics of 4'-bromochalcone derivatives using a combination of experimental and computational approaches. Quantum chemical calculations employing density functional theory (DFT) and time-dependent DFT (TD-DFT) were performed to analyze the electronic properties of the molecules. Experimental characterization involved linear optical measurements (UV-vis absorption and fluorescence spectroscopy), femtosecond transient absorption spectroscopy (TAS), and open-aperture (AO) Z-scan me

SUBMITTER: Marucci NB 

PROVIDER: S-EPMC12516734 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature