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Effect of the N-based ligands in copper complexes for depolymerisation of lignin
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Dai, Jinhuo, Nanayakkara, Sepa, Lamb, Thomas, Clark, Andrew J., Guo, Si-Xuan, Zhang, Jie, Patti, Antonio F. and Saito, Kei (2016) Effect of the N-based ligands in copper complexes for depolymerisation of lignin. New Journal of Chemistry, 40 (4). pp. 3511-3519. doi:10.1039/c5nj03152d ISSN 1144-0546.
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Official URL: http://dx.doi.org/10.1039/C5NJ03152D
Abstract
Several organic soluble N-based ligands and their copper complexes were firstly investigated as catalysts to depolymerise organosolv lignin in the organic solvent, dimethylformamide (DMF) and an ionic liquid (1-ethyl-3-methylimidazolium xylenesulfonate, [emim][ABS]). The results of screening depolymerisation reactions in DMF and [emim][ABS] showed that all the copper–amine complexes catalysed lignin depolymerisation more efficiently in ionic liquids than in DMF. Among the seven types of ligands, copper complexes with two types of ligands (E)-N-(pyridin-2-ylmethylene)aniline and (E)-4-methoxy-N-(pyridin-2-ylmethylene)aniline depolymerised the lignin more efficiently than the others. These two copper complexes with the N-based ligand were further studied to determine the most efficient conditions for the depolymerisation of the lignin. The most effective depolymerisation by conditions involved treatment at 180 °C for 12 h in [emim][ABS]. Cyclic voltammetric studies were carried out to investigate the reversible potential associated with the copper centers of their complexes with these N-based ligands. The results suggest that two types of ligands have more positive reversible potentials than those of other copper complexes.
| Item Type: | Journal Article | ||||||||
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| Subjects: | Q Science > QK Botany T Technology > TS Manufactures |
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| Divisions: | Faculty of Science, Engineering and Medicine > Science > Chemistry | ||||||||
| Library of Congress Subject Headings (LCSH): | Lignin, Polymerization | ||||||||
| Journal or Publication Title: | New Journal of Chemistry | ||||||||
| Publisher: | Royal Society of Chemistry | ||||||||
| ISSN: | 1144-0546 | ||||||||
| Official Date: | 8 February 2016 | ||||||||
| Dates: |
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| Volume: | 40 | ||||||||
| Number: | 4 | ||||||||
| Number of Pages: | 9 | ||||||||
| Page Range: | pp. 3511-3519 | ||||||||
| DOI: | 10.1039/c5nj03152d | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||||
| Date of first compliant deposit: | 9 May 2016 | ||||||||
| Date of first compliant Open Access: | 9 February 2017 | ||||||||
| Funder: | Bioprocessing Advanced Manufacturing Initiative (BAMI), Monash University, China Scholarship Council (CSC) |
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