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대한화학회 창립 75주년
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09월 20일 16시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능
제126회 대한화학회 학술발표회 및 총회
Plasmon-Induced Intramolecular Carbon-Carbon Bond Formation with Au Nanoparticles
2020년 9월 3일 16시 56분 57초
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10월 21일(수) 17:30~18:00
, Youngsoo Kim
Department of Chemistry, Yeungnam University, Korea
The homo- and the hetero-coupling reaction is one of the crucial and important synthetic strategies to construct a new carbon-carbon bond in the final organic product. Especially, these types of coupling reactions have been routinely employed in the preparation of pharmaceuticals and conjugated polymer synthesis. So far, many notable coupling reactions required transition metal catalysts like Pd, Ni, and Cu as a catalyst, and high reaction temperatures and toxic chemicals employed to achieve the new product. To overcome harsh reaction conditions and environmental issues in conventional synthetic methods, alternative synthetic strategies to form a carbon-carbon bond have been diversely proposed. Among those new ways proposed, the photocatalysis technique which uses only catalysts and light can be a reasonably unique approach because it requires mild reaction conditions (temperature and time) and less toxic chemicals. For the past decades, gold nanoparticles have been receiving great attention as photocatalyst because of unique optical property and catalytic activity at the nanoscale. Thus, we employed gold nanoparticles and visible light for the reaction of C-C coupling. In this study, we conducted a carbon-carbon single bond formation under the condition of room temperature and non-toxic chemicals with aryl halide, organoboron species, and base. Gold nanoparticles were characterized by TEM and UV-Vis spectrophotometer, and the final products were characterized by NMR and GC and GC-MS. On the basis of the fact, we confirmed that the biphenyl was synthesized by plasmonic gold catalysts, and the phenol and benzene were produced as a by-product.
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