Protonated Tungsten Bronze (H <sub> <i>x</i> </sub> WO <sub>3</sub> ) Acts as an Easily Regenerable Reagent for PCET Reactions
In this work, protonated tungsten bronze powder (H<sub><i>x</i></sub>WO<sub>3</sub>) was synthesized by a microwave heating technique from tungsten(VI) chloride in benzyl alcohol. This material facilitates a proton-coupled electron transfer (PCET) reaction with 2,2,6,6-tetramethyl-1-piperidinyloxyl (TEMPO) in toluene, an aprotic solvent, to form TEMPOH, evidenced by UV-vis analysis of the organic product and X-ray photoelectron spectroscopy (XPS) analysis showing the oxidation of W<sup>5+</sup> to W<sup>6+</sup> in the remaining powder. Then, under illumination in an acidic aqueous solution, the oxidized WO<sub>3</sub> powder reacts photochromically to regenerate H<sub><i>x</i></sub>WO<sub>3</sub>. The regenerated H<sub><i>x</i></sub>WO<sub>3</sub> reagent remains active for further PCET reactions.
Authors
- Katherine H. Morrissey
- Bart M. Bartlett (ORCID: https://orcid.org/0000-0001-8298-5963)
- Jake O’Hara (ORCID: https://orcid.org/0000-0002-5061-1681)
- Hana Chrenka
Institutions
- University of Michigan (US)
Publication Details
- Journal
- Inorganic Chemistry
- Published
- 2026-02-24
- DOI
- https://doi.org/10.1021/acs.inorgchem.5c05488
- Primary Topic
- Transition Metal Oxide Nanomaterials
- Type
- article
- Field-Weighted Citation Impact
- 0.00