Redox-Controlled Olefin (Co)Polymerization Catalyzed by Ferrocene-Bridged Phosphine-Sulfonate Palladium Complexes

Min Chen; Bangpei Yang; Changle Chen

doi:10.1002/anie.201507274

Redox-Controlled Olefin (Co)Polymerization Catalyzed by Ferrocene-Bridged Phosphine-Sulfonate Palladium Complexes

Angew Chem Int Ed Engl. 2015 Dec 14;54(51):15520-4. doi: 10.1002/anie.201507274. Epub 2015 Nov 2.

Authors

Min Chen¹, Bangpei Yang¹, Changle Chen²

Affiliations

¹ Key Laboratory of Soft Matter Chemistry, Chinese Academy of Sciences, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, 230026 (China) http://staff.ustc.edu.cn/∼changle.
² Key Laboratory of Soft Matter Chemistry, Chinese Academy of Sciences, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, 230026 (China) http://staff.ustc.edu.cn/∼changle. changle@ustc.edu.cn.

PMID: 26768533
DOI: 10.1002/anie.201507274

Abstract

The facile and reversible interconversion between neutral and oxidized forms of palladium complexes containing ferrocene-bridged phosphine sulfonate ligands was demonstrated. The activity of these palladium complexes could be controlled using redox reagents during ethylene homopolymerization, ethylene/methyl acrylate copolymerization, and norbornene oligomerization. Specifically in norbornene oligomerization, the neutral complexes were not active at all whereas the oxidized counterparts showed appreciable activity. In situ switching between the neutral and oxidized forms resulted in an interesting "off" and "on" behavior in norbornene oligomerization. This work provides a new strategy to control the olefin polymerization process.

Keywords: copolymerization; olefin polymerization; palladium catalysis; polar monomers; redox chemistry.

Publication types

Research Support, Non-U.S. Gov't