用于ε-己内酯高效开环聚合的双金属苯胺基-醛亚胺铝或锌配合物。
Bimetallic anilido-aldimine Al or Zn complexes for efficient ring-opening polymerization of epsilon-caprolactone.
作者信息
Yao Wei, Mu Ying, Gao Aihong, Gao Wei, Ye Ling
机构信息
State Key Laboratory for Supramolecular Structure and Materials, School of Chemistry, Jilin University, Changchun, People's Republic of China.
出版信息
Dalton Trans. 2008 Jun 28(24):3199-206. doi: 10.1039/b719017d. Epub 2008 Apr 17.
Four bimetallic Al or Zn complexes supported by anilido-aldimine ligands (o-C6H4(NHAr)-CH=N)2CH2CH2 (Ar = 2,6-Me2C6H3,L1H2; Ar = 2,6-iPr2C6H3, L2H2) have been synthesized and characterized. Treatment of L1H2 or L2H2 with two equiv. of AlMe3 gives bimetallic complex L1(AlMe2)2 1 or L2 (AlMe2)2 2, respectively. Reaction of L1H2 or L2H2 with two equiv. of ZnEt2 leads to bimetallic complex L1(ZnEt)2 3 or L2(ZnEt)2 4, respectively. All of the complexes 1-4 are efficient catalysts for ring-opening polymerization of epsilon-caprolactone (CL) in the presence of benzyl alcohol and catalyze the polymerization of CL in living fashion yielding polymers with a narrow polydispersity index. The activity of bimetallic Zn complexes 3 and 4 is higher than bimetallic Al complexes 1 and 2.
已合成并表征了四种由苯胺基 - 醛亚胺配体（o-C6H4(NHAr)-CH=N）2CH2CH2（Ar = 2,6-Me2C6H3，L1H2；Ar = 2,6-iPr2C6H3，L2H2）支撑的双金属铝或锌配合物。用两当量的AlMe3处理L1H2或L2H2分别得到双金属配合物L1(AlMe2)2 1或L2(AlMe2)2 2。L1H2或L2H2与两当量的ZnEt2反应分别生成双金属配合物L1(ZnEt)2 3或L2(ZnEt)2 4。在苄醇存在下，所有配合物1 - 4都是ε-己内酯（CL）开环聚合的有效催化剂，并以活性方式催化CL聚合，得到具有窄多分散指数的聚合物。双金属锌配合物3和4的活性高于双金属铝配合物1和2。
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