Journal
JOURNAL OF CO2 UTILIZATION
Volume 44, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jcou.2020.101380
Keywords
CO2; Styrene epoxide; Cyclic carbonates; Schiff bases; Nitrogen ligands; Zinc complexes; DFT calculation
Funding
- French National Agency [ANR-OXCYCAT CO2]
- GENCI/CINES [cpt2130]
Ask authors/readers for more resources
A series of Zn (II) complexes with nitrogen Schiff base ligands were synthesized and characterized, with the ability to catalyze the conversion of CO2 into cyclic carbonates. A new monomeric Zn-NSB showed excellent catalytic performance under specific conditions.
A series of Zn (II) complexes with nitrogen Schiff base ligands (NSB) has been synthesized from pyrrole carboxaldehyde. The prepared complexes were fully characterized. Single crystal X-ray diffraction analysis showed various coordination modes, as monomers or as helical dimers according to the number of available nitrogen atoms surrounding the zinc cation. The complex structure optimizations were carried out using the density functional theory (DFT) with ADF program and the dimerization energies and the temperature effect were examined. The Zn complexes were used as Lewis acids (LA) combined with tetrabutylammonium halides (N4BuX) as Lewis bases (LB), for the catalytic valorization of CO2 into cyclic carbonates. A new momomeric Zn-NSB was chosen to study the influence of different reaction parameters (temperature, CO2 pressure, LA/LB molar ratio, catalyst amount). Thus, optimized conditions afforded the solvent-free selective formation of styrene cyclic carbonate in good yields (up to 98 %) and allowed the reuse of this Zn-NSB/N4BuX catalytic system without any loss of activity.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available