Skip to Content
Merck
  • Self-assembled hybrid metal oxide base catalysts prepared by simply mixing with organic modifiers.

Self-assembled hybrid metal oxide base catalysts prepared by simply mixing with organic modifiers.

Nature communications (2015-10-06)
Masazumi Tamura, Ryota Kishi, Yoshinao Nakagawa, Keiichi Tomishige
ABSTRACT

Multidentate materials formed by simply mixing heterogeneous and homogeneous components are promising for construction of versatile active sites on the surface of heterogeneous compounds, however, to the best of our knowledge, there are no reports on such materials. Self-assembly of hetero-hybrid catalytic materials occurs when heterogeneous catalysts having adjacent Lewis acid-Lewis base sites are mixed with an organic modifier that contains at least two Lewis base functional groups. Here we demonstrate the strategy by combining cerium oxide and 2-cyanopyridine that self-assembles to form a charge-transfer complex in methanol that exhibits a 2,000-fold increase in reaction rate for hydromethoxylation of acrylonitrile with high selectivity compared with cerium oxide or 2-cyanopyridine alone. The catalytic system is applied to the transesterification and Knoevenagel condensation affording 14-fold and 11-fold higher activity, respectively, than cerium oxide alone. These results demonstrate the potential versatility of the catalytic system and the generality of the catalyst preparation strategy.

MATERIALS
Product Number
Brand
Product Description

Supelco
Ethanol solution, certified reference material, 2000 μg/mL in methanol
Sigma-Aldrich
Pyrazinecarbonitrile, 99%
Sigma-Aldrich
Benzaldehyde, ReagentPlus®, ≥99%
Sigma-Aldrich
Ethyl cyanoacetate, ≥98%
Sigma-Aldrich
2-Pyridinecarbonitrile, 99%
Sigma-Aldrich
Benzaldehyde, purified by redistillation, ≥99.5%
Sigma-Aldrich
2-Acetylpyridine, ≥99%
Sigma-Aldrich
2-Picolinic acid, ReagentPlus®, 99%
Sigma-Aldrich
Furan, ≥99%
Sigma-Aldrich
2-Pyridinemethanol, 98%
Sigma-Aldrich
Acetone, natural, ≥97%
Sigma-Aldrich
Acetone, ≥99%, meets FCC analytical specifications
Sigma-Aldrich
4-Pyridinecarbonitrile, 98%
Sigma-Aldrich
Benzaldehyde, ≥98%, FG, FCC
Sigma-Aldrich
Benzaldehyde, natural, FCC, FG
Sigma-Aldrich
Ethanol, anhydrous, denatured
Sigma-Aldrich
2,6-Lutidine, ReagentPlus®, 98%
Sigma-Aldrich
2,6-Lutidine
Sigma-Aldrich
2-Acetylpyridine, ≥99%, FG
Sigma-Aldrich
3-Pyridinecarbonitrile, 98%
Sigma-Aldrich
2-Furonitrile, 99%
Sigma-Aldrich
Methanol, BioReagent, ≥99.93%
Sigma-Aldrich
Methanol, NMR reference standard
Sigma-Aldrich
Acetone, puriss., meets analytical specification of Ph. Eur., BP, NF, ≥99% (GC)
Sigma-Aldrich
Methanol, Absolute - Acetone free
Sigma-Aldrich
Methanol, ACS spectrophotometric grade, ≥99.9%
Sigma-Aldrich
Acetone, Laboratory Reagent, ≥99.5%
Sigma-Aldrich
Acetone, ACS reagent, ≥99.5%
Sigma-Aldrich
1,4-Dioxane, ACS reagent, ≥99.0%
Sigma-Aldrich
Methanol, ACS reagent, ≥99.8%