聚酰胺
手性(物理)
催化作用
二胺
单体
选择性
铂金
高分子化学
铂纳米粒子
溶剂
化学
不对称氢化
纳米颗粒
胺气处理
材料科学
有机化学
聚合物
对映选择合成
纳米技术
物理
手征对称破缺
夸克
量子力学
Nambu–Jona Lasinio模型
作者
Poonam Sharma,Rakesh K. Sharma
标识
DOI:10.1002/slct.201601538
摘要
Abstract The present study highlights platinum nanoparticles incorporated chiral polyamide for asymmetric hydrogenation of carbonyl group. Chiral polyamides are synthesized from chiral monomers, camphoric dichloride and achiral diamine monomers by interfacial condensation reaction. This chiral polyamide supports have helical structure with molecular chirality. The polyamide helices provide chiral environment to platinum nanoparticles that transfer to substrate during catalytic hydrogenation. The chemical and optical selectivity increases with dispersion of platinum nanoparticles on chiral polyamide which act like isolated single atomic catalytic centers. The distribution of nanoparticles depends on spacer used in amine monomer unit. The catalytically active single atom nanoparticles have preferentially Pt (111) planes and exhibit excellent selectivity up to 10 cycles (TOF > 5400 h −1 and > 99.9% ee) in asymmetric hydrogenation reaction of ethyl 2‐oxo‐4‐phenylbutanoate under solvent free condition.
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