Enhanced Catalytic Activity of Aluminum Complexes for the Ring-Opening Polymerization of ε-Caprolactone

被引：26
|
作者：
Kosuru, Someswara Rao [1 ]
Sun, Ting-Han [1 ]
Wang, Li-Fang [1 ]
Vandavas, Jaya Kishore [4 ]
Lu, Wei-Yi [1 ]
Lai, Yi-Chun [1 ]
Hsu, Sodio C. N. [1 ]
Chiang, Michael Y. [1 ,3 ]
Chen, Hsuan-Ying [1 ,2 ]
机构：
[1] Kaohsiung Med Univ, Dept Med & Appl Chem, Kaohsiung 80708, Taiwan
[2] Kaohsiung Med Univ, Dept Med Res, Kaohsiung 80708, Taiwan
[3] Natl Sun Yat Sen Univ, Dept Chem, Kaohsiung 804, Taiwan
[4] Univ Ottawa, Dept Chem, Ottawa, ON K1N 6N5, Canada
来源：
INORGANIC CHEMISTRY | 2017年 / 56卷 / 14期
关键词：
STEREOSELECTIVE POLYMERIZATION; METAL-COMPLEXES; CYCLIC ESTERS; LACTIDE; BASE; LIGANDS; BONE; SCAFFOLDS; DELIVERY; BIOMOLECULES;
D O I：
10.1021/acs.inorgchem.7b00763
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
A series of dinuclear aluminum (Al(2)Pyr(2)) complexes bridged by two pyrazole ligands were synthesized, and their catalytic activity toward ring-opening polymerization of e-caprolactone (CL) was investigated. Different types of the Al-N-N-Al-N-N skeletal ring were found among these Al(2)Pyr(2) complexes. The butterfly form, (L2Al2Me4)-Al-Thio, exerted the highest catalytic activity for CL polymerization. K-2-CL coordination with both Al centers within the butterfly form (L2Al2Me4)-Al-Thio facilitates the initiation process. Generally speaking, the Al(2)Pyr(2) complexes exhibited substantially higher catalytic activity for CL polymerization than literature examples such as beta-diketiminate- or traiaza-bearing aluminum complexes. In fact, the Al(2)Pyr(2) complexes can even carry out CL polymerization at room temperature.
引用
收藏
页码：7998 / 8006
页数：9
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