Synthesis, structure, characterization and spectroscopic properties of Cu+ complexes with extended π⋯π interactions

Huang, Tian; Zhang, Minhua

doi:10.1016/j.ica.2013.10.036

Cited by 6 publications

(1 citation statement)

References 38 publications

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“…All these ligands in this study have been proved to coordinate with copper to form copper complexes. [26][27][28][29][30][31][32][33] Initial screening studies with different copper complexes with N-based ligands in DMF and IL were carried out to select the most efficient N-based ligands for lignin depolymerisation.…”

Section: Introductionmentioning

confidence: 99%

Effect of the N-based ligands in copper complexes for depolymerisation of lignin

et al. 2016

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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 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.

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