TY - JOUR
T1 - Efficient chromium-based catalysts for ethylene tri-/tetramerization switched by silicon-bridged/N,P-based ancillary ligands
T2 - A structural, catalytic and DFT study
AU - Zhang, Le
AU - Wei, Wei
AU - Alam, Fakhre
AU - Chen, Yanhui
AU - Jiang, Tao
N1 - Publisher Copyright:
© 2017 The Royal Society of Chemistry.
PY - 2017
Y1 - 2017
N2 - High performance catalysts switched by a series of silicon-bridged/N,P-based ancillary ligands have been explored. The precatalyst supported by L1 possessed a large steric bulk and exhibited a high activity of 16.8 × 106 g (mol Cr)-1 h-1 as well as a total selectivity of 99% toward 1-hexene and 1-octene. The selectivity for 1-hexene was adjustable from 59% to 88%. The catalyst bearing an L2 ligand, facilitated by a smaller steric bulk, displayed an identical activity of 13.0 × 106 g (mol Cr)-1 h-1 and a superior selectivity of 75% towards 1-octene under the appropriate conditions. The DFT calculations elucidated the reason for these excellent and tunable activities and selectivities.
AB - High performance catalysts switched by a series of silicon-bridged/N,P-based ancillary ligands have been explored. The precatalyst supported by L1 possessed a large steric bulk and exhibited a high activity of 16.8 × 106 g (mol Cr)-1 h-1 as well as a total selectivity of 99% toward 1-hexene and 1-octene. The selectivity for 1-hexene was adjustable from 59% to 88%. The catalyst bearing an L2 ligand, facilitated by a smaller steric bulk, displayed an identical activity of 13.0 × 106 g (mol Cr)-1 h-1 and a superior selectivity of 75% towards 1-octene under the appropriate conditions. The DFT calculations elucidated the reason for these excellent and tunable activities and selectivities.
UR - http://www.scopus.com/inward/record.url?scp=85032740173&partnerID=8YFLogxK
U2 - 10.1039/c7cy01561e
DO - 10.1039/c7cy01561e
M3 - Article
AN - SCOPUS:85032740173
SN - 2044-4753
VL - 7
SP - 5011
EP - 5018
JO - Catalysis Science and Technology
JF - Catalysis Science and Technology
IS - 21
ER -