Amino-Triphenolate Cerium (Ⅳ) Complexes for High Molecular Weight PLLA Synthesis and Highly Stereoselective ROP of rac-LA

IF 4.1 2区化学 Q2 POLYMER SCIENCE Polymer Pub Date : 2025-03-17 DOI:10.1016/j.polymer.2025.128291

Jianxin Sun, Xin Zhao, Luya Cao, Hongzhang Cao, Ji Xian, Xiaobo Pan, Jincai Wu

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Abstract

In the industrial production of biodegradable, bio-based, and recyclable polylactic acid (PLA), Sn(Oct)₂ is the most commonly used catalyst for the ring-opening polymerization (ROP) of L-lactide (L-LA). However, its toxicity presents significant limitations, particularly in biomedical applications. Identifying a non-toxic alternative to Sn(Oct)₂ under melting conditions remains a challenge. In this study, we report cerium(IV) complexes with aminotriphenol ligands that exhibit excellent catalytic performances for the ROP of L-LA under both mild and melting conditions. Ultra-high molecular weight PLA (up to 224.00 kg/mol) was obtained at 140°C and high catalytic activity was observed even at low catalyst loading. This is the first report of cerium(IV) complexes exhibiting such high activity, suggesting that they could serve as a viable substitute for Sn(Oct)₂. Additionally, high heteroselectivity for rac-LA was observed in both solution (P_r = 0.98) and melting conditions (P_r = 0.86).

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来源期刊

Polymer 化学-高分子科学

CiteScore

7.90

自引率

8.70%

发文量

959

审稿时长

32 days

期刊介绍： Polymer is an interdisciplinary journal dedicated to publishing innovative and significant advances in Polymer Physics, Chemistry and Technology. We welcome submissions on polymer hybrids, nanocomposites, characterisation and self-assembly. Polymer also publishes work on the technological application of polymers in energy and optoelectronics. The main scope is covered but not limited to the following core areas: Polymer Materials Nanocomposites and hybrid nanomaterials Polymer blends, films, fibres, networks and porous materials Physical Characterization Characterisation, modelling and simulation* of molecular and materials properties in bulk, solution, and thin films Polymer Engineering Advanced multiscale processing methods Polymer Synthesis, Modification and Self-assembly Including designer polymer architectures, mechanisms and kinetics, and supramolecular polymerization Technological Applications Polymers for energy generation and storage Polymer membranes for separation technology Polymers for opto- and microelectronics.