纳米团簇
聚合物
催化作用
星团(航天器)
化学工程
共聚物
金团
高分子化学
材料科学
化学
纳米技术
电子结构
有机化学
计算化学
程序设计语言
工程类
计算机科学
作者
Setsiri Haesuwannakij,Tetsunari Kimura,Yuji Furutani,Kazu Okumura,Ken Kokubo,Takao Sakata,Hidehiro Yasuda,Yumi Yakiyama,Hidehiro Sakurai
标识
DOI:10.1038/s41598-017-10165-9
摘要
Poly(N-vinyl-2-pyrrolidone) (PVP) of varying molecular weight (M w = 40-360 kDa) were employed to stabilize gold nanoclusters of varying size. The resulting Au:PVP clusters were subsequently used as catalysts for a kinetic study on the sized-dependent aerobic oxidation of 1-indanol, which was monitored by time-resolved in situ infrared spectroscopy. The obtained results suggest that the catalytic behaviour is intimately correlated to the size of the clusters, which in turn depends on the molecular weight of the PVPs. The highest catalytic activity was observed for clusters with a core size of ~7 nm, and the size of the cluster should increase with the molecular weight of the polymer in order to maintain optimal catalytic activity. Studies on the electronic and colloid structure of these clusters revealed that the negative charge density on the cluster surface also strongly depends on the molecular weight of the stabilizing polymers.
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