A Redox-Induced Spin-State Cascade in a Mixed-Valent Fe3 (μ3 -O) Triangle.
Evgen V GovorKarrar Al-AmeedIndranil ChakrabortyCarla S CosteOlena GovorYiannis SanakisJohn E McGradyRaphael G RaptisPublished in: Angewandte Chemie (International ed. in English) (2016)
One-electron reduction of a pyrazolate-bridged triangular Fe3 (μ3 -O) core induces a cascade wherein all three metal centers switch from high-spin Fe3+ to low-spin Fe2.66+ . This hypothesis is supported by spectroscopic data (1 H-NMR, UV-vis-NIR, infra-red, 57 Fe-Mössbauer, EPR), X-ray crystallographic characterization of the cluster in both oxidation states and also density functional theory. The reduction induces substantial contraction in all bond lengths around the metal centers, along with diagnostic shifts in the spectroscopic parameters. This is, to the best of our knowledge, the first example of a one-electron redox event causing concerted change in multiple iron centers.
Keyphrases
- density functional theory
- electron transfer
- molecular dynamics
- molecular docking
- aqueous solution
- high resolution
- metal organic framework
- visible light
- healthcare
- electron microscopy
- room temperature
- photodynamic therapy
- electronic health record
- single molecule
- transition metal
- diabetic rats
- big data
- drug induced
- magnetic resonance imaging
- solar cells
- smooth muscle
- nitric oxide
- mass spectrometry
- machine learning
- drug delivery
- fluorescence imaging
- solid state
- ionic liquid