Living ring-opening polymerization of epsilon-caprolactone catalyzed by beta-quinolyl-enamino aluminium complexes: ligand electronic effects

doi:10.1039/c7dt04522k

CORC > 化学研究所 > 中国科学院化学研究所

	Living ring-opening polymerization of epsilon-caprolactone catalyzed by beta-quinolyl-enamino aluminium complexes: ligand electronic effects
	Wang, Peng 1; Chao, Jianbin 2; Chen, Xia 1,3
刊名	DALTON TRANSACTIONS
	2018-03-28
卷号	47 期号:12 页码:4118-4127
ISSN号	1477-9226
DOI	10.1039/c7dt04522k
英文摘要	A series of -quinolyl-enamino aluminium complexes [AlLMe2] 1-7 {L = [(2-C9H6N)-CH?C(4-MeC6H4)-N(Ar)-], Ar = C6H5 (1), 4-FC6H4 (2), 3,4,5-F3C6H2 (3), C6F5 (4), 5-(BuC6H4)-Bu-t (5), 2,6-Me2C6H3 (6), and 2,6-(Pr2C6H3)-Pr-i (7)} were synthesized by the reaction of AlMe3 with the corresponding -quinolyl-enamine ligands. All the complexes were characterized by H-1 and C-13 NMR spectroscopy and elemental analysis. The molecular structures of complexes 1-3 and 7 were confirmed by single-crystal X-ray diffraction, which revealed that all the Al atoms adopt a distorted tetrahedral geometry. These Al complexes were tested as the initiators for the ring-opening polymerization (ROP) of epsilon-caprolactone (epsilon-CL). The polymerization results showed that 1-5 in the presence of BnOH proceeded efficiently and their catalytic behaviors toward the ROP of epsilon-CL were significantly affected by the substituents of the aryl ring (Ar) on the end of the enamino framework, where the placement of electron-withdrawing substituents caused higher catalytic activity. However 6 and 7 displayed poor activity under the same conditions, suggesting that ortho-substituents on the Ar moieties hamper the coordination-insertion of the epsilon-CL monomer. The ROP of epsilon-CL by efficient binary catalytic systems proceeded in a living manner evidenced by the narrow PDIs and the linear nature of M(n)versus conversion plots and monomer/catalyst ratios.
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000428087600015
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/46021]
专题	中国科学院化学研究所
通讯作者	Chen, Xia
作者单位	1.Shanxi Univ, Sch Chem & Chem Engn, Taiyuan 030006, Peoples R China 2.Shanxi Univ, Sci Instrument Ctr, Taiyuan 030006, Peoples R China 3.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
推荐引用方式 GB/T 7714	Wang, Peng,Chao, Jianbin,Chen, Xia. Living ring-opening polymerization of epsilon-caprolactone catalyzed by beta-quinolyl-enamino aluminium complexes: ligand electronic effects[J]. DALTON TRANSACTIONS,2018,47(12):4118-4127.
APA	Wang, Peng,Chao, Jianbin,&Chen, Xia.(2018).Living ring-opening polymerization of epsilon-caprolactone catalyzed by beta-quinolyl-enamino aluminium complexes: ligand electronic effects.DALTON TRANSACTIONS,47(12),4118-4127.
MLA	Wang, Peng,et al."Living ring-opening polymerization of epsilon-caprolactone catalyzed by beta-quinolyl-enamino aluminium complexes: ligand electronic effects".DALTON TRANSACTIONS 47.12(2018):4118-4127.