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http://dx.doi.org/10.5012/bkcs.2009.30.2.389

Non-Covalent Immobilization of Chiral (Salen) Complexes on HF-treated Mesoporous MFI-type Zeolite for Asymmetric Catalysis  

Lee, Kwang-Yeon (Department of Chemical Engineering, Inha University)
Lee, Choong-Young (Department of Chemical Environmental Technology, Inha Technical College)
Kim, Geon-Joong (Department of Chemical Engineering, Inha University)
Publication Information
Bulletin of the Korean Chemical Society / v.30, no.2, 2009 , pp. 389-396 More about this Journal
Abstract
MFI structural zeolite (ZSM-5 or Sililcalite) was treated with HF solution to introduce mesoporous channels in the microporous crystals. Inner mesopore size could be controlled from 2.5 to 3.5 nm by changing the concentration of HF solution. The pore structure of HF-treated MFI zeolite was studied by instrumental analysis. The active Co (III) salen complex monomers were successfully anchored non-covalently on the surfaces of mesoporous MFI-type zeolite. These heterogeneous catalysts could be applied in asymmetric ring opening of terminal epoxides by phenol derivatives. It showed very high enantioselectivity and yield up to 95% in the catalytic synthesis of optically active $\alpha$-aryloxy alcohol compounds.
Keywords
Mesoporous MFI; HF; Chiral (salen) complex; Non-covalent attachment; Asymmetric catalysis;
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