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- Title
Salt-Free Reduction of Nonprecious Transition-Metal Compounds: Generation of Amorphous Ni Nanoparticles for Catalytic C–C Bond Formation.
- Authors
Yurino, Taiga; Ueda, Yohei; Shimizu, Yoshiki; Tanaka, Shinji; Nishiyama, Haruka; Tsurugi, Hayato; Sato, Kazuhiko; Mashima, Kazushi
- Abstract
A salt-free procedure for the generation of a wide variety of metal(0) particles, including Fe, Co, Ni, and Cu, was achieved using 2,3,5,6-tetramethyl-1,4-bis(trimethylsilyl)-1,4-diaza-2,5-cyclohexadiene (1), which reduced the corresponding metal precursors under mild conditions. Notably, Ni particles formed in situ from the treatment of Ni(acac)2 (acac=acetylacetonate) with 1 in toluene exhibited significant catalytic activity for reductive CC bond-forming reactions of aryl halides in the presence of excess amounts of 1. By examination of high-magnification transmission electron microscopy images and electron diffraction patterns, we concluded that amorphous Ni nanoparticles (Ni aNPs) were essential for the high catalytic activity.
- Subjects
NANOPARTICLES analysis; CHEMICAL reduction; TRANSITION metal catalysts; CATALYTIC activity; MOLECULAR structure of transition metal compounds; CHEMICAL bonds; ARYLATION; COUPLING reactions (Chemistry)
- Publication
Angewandte Chemie, 2015, Vol 127, Issue 48, p14645
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201507902