Quantitative Analysis of the Steric Effect in Phosphinophenolate Nickel Catalysts for Ethylene Polymerization.

Jiaqi Zheng, Xin Xu, Zhengpeng Yan, Jinrong Niu, Shengli Jin, Qingrui Meng, Fei Lin

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Article in Polymer science & technology (Washington, D.C.), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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7 authors.

Jiaqi ZhengKey Laboratory of Functional Polymer Materials, Ministry of Education, Frontiers Science Center for New Organic Matter, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China.

Xin XuKey Laboratory of Functional Polymer Materials, Ministry of Education, Frontiers Science Center for New Organic Matter, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China.

Zhengpeng YanKey Laboratory of Functional Polymer Materials, Ministry of Education, Frontiers Science Center for New Organic Matter, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China.ORCID https://orcid.org/0009-0003-5962-1194

Jinrong NiuKey Laboratory of Functional Polymer Materials, Ministry of Education, Frontiers Science Center for New Organic Matter, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China.

Shengli JinKey Laboratory of Functional Polymer Materials, Ministry of Education, Frontiers Science Center for New Organic Matter, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China.

Qingrui MengKey Laboratory of Functional Polymer Materials, Ministry of Education, Frontiers Science Center for New Organic Matter, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China.

Fei LinKey Laboratory of Functional Polymer Materials, Ministry of Education, Frontiers Science Center for New Organic Matter, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China.ORCID https://orcid.org/0000-0002-7714-6206

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Ethylene polymerization catalysts play a pivotal role in the modern polyolefin industry. Modulating the steric effect of complexes is an effective strategy for controlling catalytic activity and the microstructure of polymers in ethylene polymerization. Phosphinophenolate Ni-(II) complexes represent a significant subclass that has been extensively studied in terms of catalyst design and ethylene polymerization performance. Nevertheless, quantitative studies of the influence of the steric effect on the catalytic performance of the complexes remain relatively limited. In this work, a series of phosphinophenolate Ni-(II) complexes bearing alkylphenyl substituents on the phosphorus side were synthesized and employed for ethylene (co)-polymerization to investigate the impact of the steric effect on ethylene polymerization. Analysis of polymerization and catalyst structure outcomes revealed a strong correlation between the key polymerization parameters (catalytic activity, polymer molecular weight, and the incorporation ratio of the polar monomer) and Sterimol B5 parameters of the substituents on the phosphorus atom, with an R

Indexed as

copolymerizationethylene polymerizationnickel catalystphosphinophenolate ligandsteric hindrancesterimol parameter

Identifiers

PMID42799150

DOI10.1021/polymscitech.6c00052

PMCPMC13614132

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.