Heterometallic effects in tetrametallic triiron clusters
Abstract
Heterometallic effects in metal-oxide clusters are of interest because of their relevance to both natural systems (heterometallic enzymic active sites such as Photosystem II) and artificial materials (mixed-metal oxide catalysts for energy conversion reactions such as dioxygen redn. and water oxidn.). In particular, the influence of Lewis acidic, redox-inactive metal centers on redox processes in many such systems is not fully understood. To gain insight into how redox-active metal clusters are modulated by redox-inactive metal centers, a series of tetranuclear oxo/hydroxo clusters were prepd. comprised of three Fe centers and a redox-inactive metal (M). These clusters were found to contain a Fe_3M(μ_4-O)(μ_2-OH) core (M = Ca, Sr, Zn, La, Sc), and were characterized by single-crystal X-ray diffraction, Mossbauer spectroscopy, and cyclic voltammetry. The effects of the redox-inactive metal centers on the properties and reactivity of these tetranuclear clusters will be discussed.
Additional Information
© 2014 American Chemical Society.Additional details
- Eprint ID
- 48399
- Resolver ID
- CaltechAUTHORS:20140812-125655020
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2014-08-12Created from EPrint's datestamp field
- Updated
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2020-03-09Created from EPrint's last_modified field