Living ring-opening homo- and copolymerisation of epsilon-caprolactone and L-lactide by cyclic beta-ketiminato aluminium complexes

doi:10.1039/c3dt52712c

CORC > 化学研究所 > 中国科学院化学研究所

	Living ring-opening homo- and copolymerisation of epsilon-caprolactone and L-lactide by cyclic beta-ketiminato aluminium complexes
	Liu, Yan 1,2; Dong, Wei-Shi 1; Liu, Jing-Yu 1; Li, Yue-Sheng 1
刊名	DALTON TRANSACTIONS
	2014
卷号	43 期号:5 页码:2244-2251
ISSN号	1477-9226
DOI	10.1039/c3dt52712c
英文摘要	A series of novel aluminium complexes containing cyclic beta-ketiminato ligands of type Me2Al{O-[(ArN=CHC4H4(C6H4))]} (3a, Ar = 2,6-(Pr2C6H3)-Pr-i; 3b, Ar = C6H5; 3c, Ar = C6F5) have been prepared in high yields. These complexes were identified by H-1, C-13 NMR spectroscopy and elemental analysis. X-ray structural analyses for 3a-c revealed that these complexes have a distorted tetrahedral geometry around Al, and both bond distances and bond angles were considerably influenced by the ligand structure. These complexes were tested as catalyst precursors for ring-opening polymerisation of epsilon-caprolactone (epsilon-CL) and L-lactide (L-LA) in the presence of 2-propanol as an initiator. Complex 3a could polymerize epsilon-CL in a controlled manner with high efficiency. Based on the living characteristics, the preparation of well-defined block copolymers PCL-b-PLLA via sequential addition of monomers was performed by 3a. Note that complex 3c exhibited rather high catalytic activity for the ROP of L-LA with narrow molecular weight distribution. The monomer conversion reached completion only in 4 h when the L-LA/Al molar ratio was 100 at 80 degrees C. PLLA-b-PCL copolymers were thus easily produced by 3c.
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000328952500039
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/51373]
专题	中国科学院化学研究所
通讯作者	Liu, Jing-Yu
作者单位	1.Chinese Acad Sci, State Key Lab Polymer Phys & Chem, Changchun Inst Appl Chem, Changchun 130022, Peoples R China 2.Yanshan Univ, Coll Environm & Chem Engn, Qinhuangdao 066004, Peoples R China
推荐引用方式 GB/T 7714	Liu, Yan,Dong, Wei-Shi,Liu, Jing-Yu,et al. Living ring-opening homo- and copolymerisation of epsilon-caprolactone and L-lactide by cyclic beta-ketiminato aluminium complexes[J]. DALTON TRANSACTIONS,2014,43(5):2244-2251.
APA	Liu, Yan,Dong, Wei-Shi,Liu, Jing-Yu,&Li, Yue-Sheng.(2014).Living ring-opening homo- and copolymerisation of epsilon-caprolactone and L-lactide by cyclic beta-ketiminato aluminium complexes.DALTON TRANSACTIONS,43(5),2244-2251.
MLA	Liu, Yan,et al."Living ring-opening homo- and copolymerisation of epsilon-caprolactone and L-lactide by cyclic beta-ketiminato aluminium complexes".DALTON TRANSACTIONS 43.5(2014):2244-2251.