纳米团簇
催化作用
对映选择合成
对映体
苯乙酮
贵金属
对映体过量
材料科学
密度泛函理论
多相催化
金属
吸附
化学
物理化学
有机化学
计算化学
作者
Masazumi Tamura,Nao Hayashigami,Akira Nakayama,Yoshinao Nakagawa,Keiichi Tomishige
标识
DOI:10.1021/acscatal.1c04427
摘要
Modification of supported noble metals with chiral modifiers is a promising strategy for the design of effective heterogeneous chiral catalysts. The chiral compounds are generally introduced on the surface of noble metals, often leading to low enantioselectivity and to low activity. Herein, a unique heterogeneous chiral catalyst where a chiral modifier is introduced at the interface between the metal cluster and the support is presented. Modification of CeO2-supported Ir nanoclusters with 2-amino-2′-hydroxy-1,1′-binaphthyl (NOBIN) as a chiral modifier provided a heterogeneous chiral catalyst where NOBIN is introduced at the interface between Ir nanoclusters and the CeO2 support. The heterogeneous chiral catalyst enabled the asymmetric hydrogenation of acetophenone to provide 1-phenylethanol with moderate enantiomeric excess (ee) (up to 53%). The catalyst characterizations showed that about 1 nm Ir metal nanoclusters are formed on CeO2, and density functional theory calculations presented that NOBIN is adsorbed onto Ir nanoclusters and CeO2 at the NH2 and OH groups, respectively, constructing the asymmetric reaction field among NOBIN, Ir nanoclusters, and CeO2.
科研通智能强力驱动
Strongly Powered by AbleSci AI