Direct Estimation of the Surface Location of Immobilized Functional Groups for Concerted Catalysis Using a Probe Molecule

Hiroto Noda, Ken Motokura, Yusuke Wakabayashi, Kaori Sasaki, Hiroo Tajiri, Akimitsu Miyaji, Sho Yamaguchi, Toshihide Baba

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

The location of active sites during concerted catalysis by a metal complex and tertiary amine on a SiO2 surface is discussed based on the interaction between the functionalized SiO2 surface and a probe molecule, p-formyl phenylboronic acid. The interactions of the probe molecule with the surface functionalities, diamine ligand, and tertiary amine, were analyzed by FT-IR and solid-state 13C and 11B MAS NMR. For the catalyst exhibiting high 1,4-addition activity, the diamine ligand and tertiary amine base exist in closer proximity than in the catalyst with low activity.

Original languageEnglish
Pages (from-to)5113-5117
Number of pages5
JournalChemistry - A European Journal
Volume22
Issue number15
DOIs
Publication statusPublished - 2016 Apr 4
Externally publishedYes

Keywords

  • active site distance
  • amine
  • heterogeneous concerted catalysis
  • probe molecule

ASJC Scopus subject areas

  • Catalysis
  • Organic Chemistry

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