A Comparative Study on Dinuclear and Mononuclear Aluminum Methyl Complexes Bearing Piperidyl-Phenolato Ligands in ROP of Epoxides

作者：Li, Wenyi; Ouyang, Hao; Chen, Lijuan; Yuan, Dan^*; Zhang, Yong; Yao, Yingming^*

来源：Inorganic Chemistry, 2016, 55(13): 6520-6524.

DOI：10.1021/acs.inorgchem.6b00639

• RING-OPENING POLYMERIZATION
• EPSILON-CAPROLACTONE POLYMERIZATION
• SPEED ANIONIC-POLYMERIZATION
• PROPYLENE-OXIDE
• CATIONIC ALUMINUM
• CATALYTIC-ACTIVITY
• STRUCTURAL-CHARACTERIZATION
• IMMORTAL POLYMERIZATION
• ETHYLENE-OXIDE
• BIDENTATE

Dinuclear aluminum methyl complexes stabilized by piperidyl-phenolato ligands were prepared and characterized. The ring-opening polymerizations of cyclohexene oxide (CHO) and propylene oxide (PO) initiated by dinuclear complexes and mononuclear analogues were investigated and compared. Enhanced activity of dinuclear complexes compared to that of mononuclear analogues in both the ring-opening polymerization of CHO and PO proves the synergistic interaction of two Al centers in the former. End-group analysis of oligomers by MALDI-TOF mass spectrometry confirms the role of methyl groups as initiating groups. A bimetallic mechanism is proposed, in which the cooperation of two Al centers are involved in polymerization processes.

• 出版日期2016-7-4
• 单位湖南科技学院; 苏州大学