Modified 2-Quinolinones For Photocatalysis: The Fluorescence Quantum Yield (ΦF) Of Novel 2-Quinolinone Derivatives

Authors

Reggina Moreno Trevino, DePaul UniversityFollow
Graham Griffin, DePaul UniversityFollow

Faculty Advisor

Dr. Graham Griffin, P.h.D.

Abstract

The photophysical properties of novel 2-quinolinone derivatives were examined to evaluate their potential as photocatalysts using fluorescence and UV-Vis absorbance spectroscopy. The fluorescence quantum yields were determined via the relative comparative method, using target absorbance values at a specific wavelength to prepare solutions and comparing these measurements to the reference molecule carbostyril-124. Molar absorptivity values were also calculated to assess the light absorption properties for each compound. Among the derivatives, PAV-3 presented with the highest molar absorptivity and fluorescence quantum yield values (ε= 15297.3 M-1 cm-1, ΦF= 17.1%), while PAV-5 showed the lowest (ε= 4796.2 M-1 cm-1, ΦF= 2.3%). The reduced photophysical properties of PAV-5 were a direct result of the derivative's rigid structure, which allowed for a greater portion of absorbed light to be dissipated through non-radiative pathways, marking this derivative as the most promising 2-quinolinone derivative for photocatalytic applications.

Recommended Citation

Moreno Trevino, Reggina and Griffin, Graham (2025) "Modified 2-Quinolinones For Photocatalysis: The Fluorescence Quantum Yield (ΦF) Of Novel 2-Quinolinone Derivatives," DePaul Discoveries: Volume 14, Article 3.
Available at: https://via.library.depaul.edu/depaul-disc/vol14/iss1/3