Binding Orientation of a Ruthenium-Based Water Oxidation Catalyst on a CdS QD Surface Revealed by NMR Spectroscopy.
Orion M PearceJeremiah S DuncanBimala LamaGordana DukovicNiels H DamrauerPublished in: The journal of physical chemistry letters (2020)
We report on the binding of a Ru-based water oxidation catalyst (WOC) to CdS quantum dots (QDs) revealed by 1H NMR spectroscopy. Spin centers within the WOC exhibit correlated trends in chemical shift and T2 lifetime shortening upon QD binding. These effects are a highly directional function of proton position within the WOC, thus uncovering orientation information relative to the QD surface. The data suggest that the WOC interacts with the QD surface via the Ru terpyridine ligand, an unexpected orientation that has important implications for interfacial charge transfer and subsequent catalysis. This binding motif enables strong enough donor-acceptor electronic coupling for ultrafast photoinduced hole transfer while maintaining electronically distinct functional subunits.
Keyphrases
- quantum dots
- electron transfer
- visible light
- energy transfer
- room temperature
- binding protein
- ionic liquid
- dna binding
- hydrogen peroxide
- sensitive detection
- electronic health record
- highly efficient
- molecular dynamics simulations
- healthcare
- nitric oxide
- carbon dioxide
- molecular dynamics
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- data analysis