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Hokkaido University Collection of Scholarly and Academic Papers >
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Catalysis of surface dispersed Cu2+ species on t-ZrO2: square-planar Cu catalyzed cross-coupling of arylboronic acid and imidazole
| Title: | Catalysis of surface dispersed Cu2+ species on t-ZrO2: square-planar Cu catalyzed cross-coupling of arylboronic acid and imidazole |
| Authors: | Kondo, Masaru Browse this author →KAKEN DB | | Joutsuka, Tatsuya Browse this author →KAKEN DB | | Fujiwara, Kakeru Browse this author →KAKEN DB | | Honma, Tetsuo Browse this author →KAKEN DB | | Nishijima, Masahiko Browse this author | | Tada, Shohei Browse this author →KAKEN DB |
| Issue Date: | 7-Apr-2023 |
| Publisher: | Royal Society of Chemistry |
| Journal Title: | Catalysis science and technology |
| Volume: | 13 |
| Issue: | 7 |
| Start Page: | 2247 |
| End Page: | 2254 |
| Publisher DOI: | 10.1039/d3cy00024a |
| Abstract: | We examined the Chan-Lam cross-coupling of imidazole and arylboronic acids under additive-free and mild conditions using heterogeneous CuO/MOX catalysts such as metal oxide-supported CuO and Cu-doped metal oxides. Among them, CuO/t-ZrO2 exhibited the best performance, which was more than ten times the turnover number in comparison with that of bulk CuO. By combining experimental and computational approaches, we elucidated the surface structure of CuO/t-ZrO2. The catalyst contained abundant highly reducible Cu2+ species, in contrast to other Cu2+-containing catalysts. Notably, X-ray absorption spectroscopy and density functional theory calculations revealed that the Cu2+ species are square-planar [CuO4]. Our results indicate that the highly active [CuO4] species play a key role in the present coupling reaction. |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/91243 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 多田 昌平
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