Citation: Heng Gao, Zhaocong Cheng, Guangshui Tu, Zonglin Qiu, Xieyi Xiao, Haotian Zhou, Handou Zheng, Haiyang Gao. Thermally robust bis(imino)pyridyl iron catalysts for ethylene polymerization: Synergy effects of weak π-π interaction, steric bulk, and electronic tuning[J]. Chinese Chemical Letters, ;2025, 36(5): 110762. doi: 10.1016/j.cclet.2024.110762 shu

Thermally robust bis(imino)pyridyl iron catalysts for ethylene polymerization: Synergy effects of weak π-π interaction, steric bulk, and electronic tuning

School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, DSAPM Lab, Sun Yat-sen University, Guangzhou 510275, China

zhenghdou@mail.sysu.edu.cn

gaohy@mail.sysu.edu.cn

Received Date: 11 October 2024
Revised Date: 9 December 2024
Accepted Date: 12 December 2024
Available Online: 13 December 2024

Figures(5)

A series of “half-sandwich” bis(imino)pyridyl iron complexes with a substituted 8-(p-X-phenyl)naphthylamine (X = OMe, Me, CF₃) was designed and synthesized by combining weak π-π interaction with steric and electronic tunings. The weak noncovalent π-π interaction as well as the steric and electronic effects of bis(imino)pyridyl iron complexes were identified by experimental analyses and calculations. The roles of weak π-π interaction, steric bulk, and electronic tuning on the ethylene polymerization performance of bis(imino)pyridyl iron catalysts were studied in detail. The combination of π-π interaction with steric and electronic tunings can access to thermally stable bis(imino)pyridyl iron at 130 ℃.
- Bis(imino)pyridyl iron,
- π-π Interaction,
- Steric effect,
- Electronic effect,
- Ethylene polymerization
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