介孔手性钯催化剂在水相中快速选择性氧化苯乙烯为苯乙酮。

Fachbereich Chemie, Technische Universität Kaiserslautern, Erwin-Schrödinger-Str. 54, D-67663 Kaiserslautern, Germany.

Molecules. 2021 Oct 26;26(21):6450. doi: 10.3390/molecules26216450.

A heterogeneous Janus-type palladium interphase catalyst was obtained by selective surface modification of a hollow mesoporous silica material. The catalyst comprises hydrophobic octyl groups on one side of the silica nanosheets and single-site bis-imidazoline dichlorido palladium(II) complexes on the other. The structure of this composite material has been analyzed by means of elemental analysis, atomic absorption spectroscopy, BET surface analysis, TGA, SEM and solid-state CP-MAS C and Si NMR spectroscopy. The catalyst showed extraordinary activity for the aqueous-phase oxidation of styrene to acetophenone using 30% hydrogen peroxide as the oxidant. An 88% yield of acetophenone could be achieved after 60 min.

通过对中空介孔硅材料进行选择性表面修饰，得到了一种非均相的类 Janus 钯相间催化剂。该催化剂在硅纳米片的一侧包含疏水性辛基基团，另一侧包含单配位双咪唑啉二氯合钯(II)配合物。通过元素分析、原子吸收光谱、BET 表面分析、TGA、SEM 和固态 CP-MAS C 和 Si NMR 光谱对复合材料的结构进行了分析。该催化剂在以 30%过氧化氢为氧化剂的苯乙烯水相氧化为苯乙酮的反应中表现出非凡的活性。在 60 分钟后，可实现 88%的苯乙酮产率。