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催化学报  2015 

多壁碳纳米管负载Cu2O和CuI催化剂上芳醛与2-氨基吡啶氧化酰胺化反应:Cu(I)物种的催化作用

DOI: 10.1016/S1872-2067(15)60964-0, PP. 1825-1836

Keywords: 氧化亚铜,碘化铜,多壁碳纳米管,2-氨基吡啶,氧化酰胺化

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Abstract:

?采用浸渍法制备了多壁碳纳米管(MWCNT)负载的Cu2O和CuI催化剂,并运用粉末X射线衍射、红外光谱、扫描电镜-能量散射谱、透射电镜和NH3程序升温脱附等技术对催化剂进行了表征.结果表明,催化剂中沉积的Cu2O和CuI分别以立方相和γ相存在于MWCNT上,且表现出由弱到强的拉电子(Lewis酸)性能.将催化剂用于催化芳醛与2-氨基吡啶氧化酰胺化反应合成N-(吡啶-2-基)苯酰胺类化合物,产物选择性为100%,收率为50%-95%.CuI/MWCNT催化剂上产物分离收率性能好于Cu2O/MWCNT,但后者的循环使用性能更好.与共价的CuI相比,离子化的Cu2O与极性的酸活化的MWCNT间具有更适宜的相互作用,这种不同的相互作用可显著影响2-氨基吡啶的氨基对芳醛羰基的亲核进攻速率.

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