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| Type |
Poster Presentation |
| Area |
Inorganic Chemistry |
| Room No. |
Exhibition Hall 2+3 |
| Time |
10월 19일 (목요일) 11:00~12:30 |
| Code |
INOR.P-48 |
| Subject |
Investigation of geometric and electronic structure of high-valent cobalt complex |
| Authors |
Yujeong Kim, Wonwoo Nam1, Sun Hee Kim*
Western Seoul Center, Korea Basic Science Institute, Korea
1Department of Chemistry, Ewha Womans University, Korea
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| Abstract |
High-valent metal-oxo species are suggested to mediate several important oxidation reaction; C-H bond activation and water oxidation, for instance. Since the transition metal-oxo complexes have a short life time, spectroscopic analysis is thus difficult. Despite of the difficulty in preparing for short-lived metal-oxo species, the identification of the geometric and electronic structures of the species is crucial due to its importance in elucidating the catalytic mechanism. Recently, some studies have found that high-valent cobalt-oxo intermediates are synthesized and successfully captured. In this poster, we will present EPR spectroscopic result of a high-valent cobalt-oxo intermediate. Multi-frequency (9/34/94 GHz) continuous wave (CW) and electron spin echo (ESE) EPR on the cobalt complex were performed and Q-band (34 GHz) electron nuclear double resonance (ENDOR), electron spin echo envelope modulation (ESEEM) and X-band hyperfine sub-level correlation (HYSCORE) experiments were conducted to investigate the electronic structure of the cobalt-oxo intermediate. In addition, Q-band 1H ENDOR, 14N ESEEM and X-band 14N HYSCORE measurements were perfomed to explore the more detailed geometry of the cobalt complex. This study supports the powerful spectroscopic evidence of the electronic structure of CoIV(O) species. |
| E-mail |
yjkim9@kbsi.re.kr |
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120th General Meeting of the KCS