Abstract
This Letter reports Pd-nanocluster catalysts and their formation in ligand-free Suzuki-Miyaura reactions with palladium(II) nitrate as a precatalyst. The catalysts are water-soluble neutral Pd tetramer and trimer in their singlet electronic states, as identified by UV-vis absorption spectroscopy, and are formed by leaching of spherical Pd(0) nanoparticles with an average diameter of about 3 nm. The Pd(0) nanoparticles are produced by reducing palladium(II) nitrate and characterized with transmission electron microscopy and Pd K-edge extended X-ray fine structure spectroscopy. The Pd(II) reduction is induced by ethanol, enhanced by potassium hydroxide, and monitored with X-ray photoelectron spectroscopy.
Original language | English |
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Pages (from-to) | 3188-3193 |
Number of pages | 6 |
Journal | ACS Applied Nano Materials |
Volume | 5 |
Issue number | 3 |
DOIs | |
State | Published - Mar 25 2022 |
Bibliographical note
Publisher Copyright:© 2022 American Chemical Society. All rights reserved.
Keywords
- Pd nanoclusters
- Pd(II) reduction
- UV-vis spectroscopy
- X-ray absorption spectroscopy
- X-ray photoelectron spectroscopy
- cross-coupling
- homogeneous catalysis
ASJC Scopus subject areas
- General Materials Science