摘要/Abstract

利用NaBH₄和L-半胱氨酸（L-Cys），采用一种简单的还原方法合成了L-Cys-β-CD@AuNPs纳米粒子.研究了L-Cys-β-CD@AuNPs对4-硝基苯酚和4-硝基-1-萘酚的还原催化活性，结果表明：L-Cys-β-CD@AuNPs纳米粒子对4-硝基苯酚和4-硝基-1-萘酚的还原活性不同，由于β-环糊精（β-CD）与不同客体分子的选择性结合，对不同底物具有不同的催化活性.实验结果表明，L-Cys-β-CD@AuNPs对4-硝基-1-萘酚的还原反应效率优于对硝基苯酚.
关键词: β-环糊精, 催化, 金纳米粒子, 分子选择性, 有机-无机杂化材料
L-Cys-β-CD@AuNPs nanoparticles were synthesized by a simple method of the reduction of HAuCl₄ with NaBH₄and L-Cys-CD. The catalytic activity of L-Cys-β-CD@AuNPs nanoparticles for the catalytic reductions of 4-nitrophenol and 4-nitro-1-naphthol was researched in detail. Because of the selective binding of β-cyclodextrin (β-CD) to different guest molecules, L-Cys-β-CD@AuNPs exhibits diverse catalytic activities for different substrates. The experimental results prove that L-Cys-β-CD@AuNPs shows better catalytic efficiency for the reduction of 4-nitro-1-naphthol than p-nitrophenol.
Key words: β-cyclodextrin, catalysis, gold nanoparticles, molecular selectivity, organic-inorganic hybrid materials


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