A Chemometric Approach for Determining the Reaction Quantum Yields in Consecutive Photochemical Processes

MARCOLONGO, J. P.; SCHMIDT, J.; LEVIN, N.; SLEP, LEONARDO DANIEL

PHYSICAL CHEMISTRY CHEMICAL PHYSICS

ROYAL SOC CHEMISTRY

Lugar: CAMBRIDGE; Año: 2017 vol. 19 p. 21373 - 21381

1463-9076

A chemometric procedure to deal with spectroscopically monitored processes involving photochemical steps is fully described. The methodology allows working with reactions that involve several components with unknown (and eventually overlapping) spectra and provides a tool for the simultaneous determination of both the quantum yields of reaction and the spectra of all the species present in a multi-step photochemical process. As a benchmark, we apply these ideas to extract the quantum yields of photodetachment of coordinated ligands employing data recorded over the course of the decomposition of [Ru(tpm)(bpy)(CH3CN)]2+ and cis-[Ru(bpy)2(CH3CN)2]2+ under stationary photolysis conditions. The approach is fast and robust and it is easily implemented in scientific programming languages.