Synthesis of amine-bridged bis(phenolate) rare-earth metal alkoxides and their catalytic performance for the polymerization of trimethylene carbonate and L‑lactide
作者:Guojun Hu、Ziyue Deng、Yanwei Wang、Dan Yuan、Yong Zhang、Yingming Yao
DOI:10.1016/j.jorganchem.2023.122941
日期:2024.1
n = 2; RE = Nd (2), Y (3), Yb (4), Lu (5), n = 1) and LNd(OCH2CF3)(THF)2 (6) in good isolated yields. These complexes were efficient initiators for the homopolymerization of both TMC and L-LA. Kinetics of the polymerization of TMC and L-LA initiated by complex 6 was investigated, and the results showed that the polymerizations of L-LA and TMC were first order for the initiator and monomer concentrations
合成了一系列由胺桥双酚盐配体稳定的稀土金属配合物,并将其用作三亚甲基碳酸酯(TMC)和L-丙交酯(L -LA)聚合的引发剂。胺桥双酚LH 2 (L = (CH 3 ) 2 NCH 2 CH 2 N[CH 2 -(2-OH-3- t Bu-5-OMe-C 6 H 2 )的一锅反应)] 2 )与(C 5 H 5 ) 3 RE(THF)或Nd[N(SiMe 3 ) 2 ] 3以1:1摩尔比进行处理,然后用1当量处理。ROH (R = (CF 3 ) 2 CH, CF 3 CH 2 ) 得到胺桥联双(酚盐)稀土金属醇盐 LRE(OCH(CF 3 ) 2 )(THF) n (RE = La ( 1 ) , n = 2; RE = Nd ( 2 ), Y ( 3 ), Yb ( 4 ), Lu ( 5 ), n = 1) 和 LNd(OCH 2 CF 3 )(THF) 2 ( 6 ) 具有良好的分离产率。这些配合物是