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Updated: Jan 21, 2026

Controlled Photoredox Ring-Opening Polymerization of O-Carboxyanhydrides Mediated by Ni/Zn Complexes
Published on: November 21, 2017
Tridentate diarylamido-based pincer complexes of nickel and palladium: sidearm effects in the polymerization of
1Department of Polymer Materials, College of Materials Science and Engineering, Shanghai University, Materials Building, Nanchen Street 333, Shanghai 200444, China. xcshi@shu.edu.cn.
Abstract:
Nickel and palladium complexes bearing new diarylamido-based unsymmetrical [NNNox] and [SNNox] pincer ligands were synthesized and tested for the polymerization of norbornene. Upon the activation of MAO, all the palladium complexes showed high catalytic activities for the vinyl-addition polymerization of norbornene up to 5.32 × 107 g of PNB (mol of Pd)-1 h-1, while the corresponding nickel complexes exhibited unsatisfactory catalytic activities. Besides the usual steric and electronic effects, the sidearm effects of quinolino ([NNNox] ligands) and phenylthio ([SNNox] ligands) moieties have also exhibited obvious influence on the catalytic performance for the polymerization of norbornene and were further studied by density functional theory (DFT) calculations.
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