Heterogenisation of a C-Scorpionate Fe-II Complex on Carbon Materials for Cyclohexane Oxidation with Hydrogen Peroxide

• Type: Article in International Scientific Journal
• Date: 2013

Authors

L.M.D.R.S. Martins (Author) Other; M. Peixoto de Almeida (Author) FEUP; Sónia Carabineiro (Author) FEUP; José Luís Figueiredo (Author) FEUP; A.J.L. Pombeiro (Author) Other

Journal

Title: ChemCatChem

Vol. 5

Pages: 3847-3856

ISSN: 1867-3880

Publisher: Wiley-Blackwell

Indexing

ISI Web of Knowledge - 81 Citations

ISI Web of Science

Scopus - 84 Citations

Scientific classification

FOS: Natural sciences

Other information

Authenticus ID: P-006-JA7

DOI: 10.1002/cctc.201300432

Abstract (EN): The hydrotris(pyrazol-1-yl)methane iron(II) complex [FeCl2{(3)-HC(pz)(3)}] (pz=pyrazol-1-yl) (1) was immobilized on three different carbon materials (activated carbon, carbon xerogel and multi-walled carbon nanotubes) with three different surface treatments (original, treated with nitric acid, and treated with nitric acid followed by sodium hydroxide) to produce active, selective and recyclable catalysts. The heterogenisation process was more efficient for carbon nanotubes treated with nitric acid and sodium hydroxide. An outstanding improved catalytic performance of complex 1 upon heterogenisation on carbon nanotubes treated with nitric acid and sodium hydroxide (turnover numbers up to 5.6x10(3) and overall yield of 21%), relative to the homogeneous system, was achieved for the single-pot peroxidative oxidation of cyclohexane to the cyclohexanone and cyclohexanol mixture. The heterogenised systems allowed their easy recovery and reuse, at least for five consecutive cycles, maintaining 96% of the initial activity and concomitant rather high selectivity to cyclohexanol and cyclohexanone.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 10