Academic Journals Database
Disseminating quality controlled scientific knowledge

Co(salen) catalysed oxidation of synthetic lignin-like polymer: Co(salen) effects

Author(s): Zhou Xue-Fei | Liu Jing

Journal: Hemijska Industrija
ISSN 0367-598X

Volume: 66;
Issue: 5;
Start page: 685;
Date: 2012;
VIEW PDF   PDF DOWNLOAD PDF   Download PDF Original page

Keywords: Co(salen) | Catalytic oxidation | Lignin model polymer | Co(salen) effect | FTIR | 13C-NMR | GC-MS

In this paper, Co(salen) [salen = N, N’-bis(salicylidene)ethylenediamine] complex was studied as oxygen activators for the catalytic oxidation of a lignin model polymer using water as the solvent, with molecular oxygen and hydrogen peroxide as the oxidants. The effect of Co(salen) on oxidation was tested by spectroscopic methods (FTIR, 13C-NMR and GC-MS). The reactions catalysed by Co(salen) included Cα-alcohol oxidation, Cα-Cβ side chain cleavage, demethoxylation, aromatic ring cleavage, and β-O-4 cleavage. In addition to the mechanistic information obtained, the effect of Co(salen) suggests that Co(salen) can be important for the catalytic oxidation, as they affect the oxidation of lignin model polymer. The reaction performed in the presence of Co(salen) was more efficient than without it. The formation of aldehyde in the catalytic oxidation, as shown by GC-MS, could be identified as the mechanism of oxidative cleavage of the β-O-4 bonds.
Save time & money - Smart Internet Solutions      Why do you need a reservation system?