Results
Title

Influence of the Linker Chemistry on the Photoinduced Charge‐Transfer Dynamics of Hetero‐dinuclear Photocatalysts.

Authors

Zedler, Linda; Müller, Carolin; Wintergerst, Pascal; Mengele, Alexander K.; Rau, Sven; Dietzek‐Ivanšić, Benjamin

Abstract

To optimize light‐driven catalytic processes, light‐mediated multi‐electron transfer dynamics in molecular dyads need to be studied and correlated with structural changes focusing on the catalytically active metastable intermediates. Here, spectro‐electrochemistry has been employed to investigate the structure‐dependent photoelectron transfer kinetics in catalytically active intermediates of two Ru−Rh catalysts for light‐driven NAD reduction. The excited‐state reactivity of short‐lived intermediates was studied along different photoreaction pathways by resonance Raman and time‐resolved transient absorption spectro‐electrochemistry with sub‐picosecond time resolution under operando conditions. The results demonstrate, for the first time, how the bridging ligand serves as a (multi‐)electron storage structure, mediates the strength of the electronic coupling of catalytic and photocenter and impacts the targeted electron transfer as well as parasitic electron‐transfer kinetics.

Subjects

PHOTOCATALYSTS; RUTHENIUM catalysts; PHOTOCHEMISTRY; SOLUTION (Chemistry); CHARGE exchange; RESONANCE Raman spectroscopy; MOLECULAR dynamics

Publication

Chemistry - A European Journal, 2022, Vol 28, Issue 35, p1

ISSN

0947-6539

Publication type

Academic Journal

DOI

10.1002/chem.202200490