Clean Technology, Vol.17, No.1, 13-18, March, 2011
팔라듐 나노입자가 담지된 메조포러스 실리카의 제조와 이를 이용한 Suzuki Cross-Coupling 반응의 적용연구
Synthesis of Palladium Nanoparticles Encapsulated in Phosphine Ligand-Grafted Mesoporous Silicas and Their Application to Suzuki Cross-Coupling Reaction
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초록
포스핀(phosphine) 리간드(ligand)가 도포된 메조포러스 실리카(mesoporous silicas)에 팔라듐 나노입자를 도입하여 새로운 팔라듐(Pd) 불균일 촉매(heterogeneous catalyst)를 제조하였다. 제조된 촉매는 브롬화벤젠 유도체(bromobenzene derivatives)들의 Suzuki cross-coupling 반응에 대하여 뛰어난 촉매활성을 나타내었고 촉매를 두 번째 사용하였을 때는 수율이 감소하였다.
Phosphine ligand-grafted mesoporous silica materials with large pores were prepared for the ligand-modified heterogeneous Pd nanocatalysts. New heterogeneous catalytic system was developed using palladium nanoparticJes encapsulated in phosphine ligand-grafted mesoporous silica. The catalyst showed good catalytic activities for Suzuki cross-coupling using bromobenzene derivatives due to excellent phosphinε ligand effects. Catalytic results showed nanoparticle catalysts can be rεcycled twice with decreased yields.
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