Phosphinimino-amino Magnesium Complexes: Synthesis and Catalysis of Heteroselective ROP of rac-Lactide
文献类型：期刊论文
| 作者 | Xie, Hongyan1,2; Mou, Zehuai1,2; Liu, Bo1; Li, Ping3; Rong, Weifeng1,2; Li, Shihui1; Cui, Dongmei1 |
| 刊名 | ORGANOMETALLICS
 |
| 出版日期 | 2014-02-10 |
| 卷号 | 33期号:3页码:722-730 |
| ISSN号 | 0276-7333 |
| DOI | 10.1021/om401056s |
| 英文摘要 | Alkane elimination reactions of phosphinimino-amine ligands HL1-8 ((2,6-Me-2-C6H3NH)C(Ph)=CHPPh2(NAr) (Ar = C6H5 (HL1); 2,6-Me-2-C6H3 (HL2); 2,6-Et-2-C6H3 (HL3); 2,6-Pr-i(2)-C6H3 (HL4); 2-OMe-C6H4 (HL5); 2-Cl-C6H4 (HL6); 3-CF3-C6H4 (HL7); 4-MeO-C6H4 (HL8)) with (MgBu2)-Bu-n, respectively, afforded a series of phosphinimino-amine-based complexes (L1-8MgBu)-Bu-n(THF) (1-8) by releasing butane. Complexes 1-8 are phosphinimino-amine-ligated THF-solvated mono(alkyl)s, among which 1-4 adopt twisted tetrahedral geometries, whereas 5 contains a trigonal bipyramido geometry core. Complexes 1-8 all display high activity for the ring-opening polymerization of rac-lactide. The molecular weights of the resulting PLA are close to the theoretic values, and the molecular weight distributions are narrow. Moreover, these complexes show medium to high heteroselectivity, which, interestingly, increases with the decrease of the ligand steric hindrance; thus, complex 1, bearing a less bulky ligand, exhibits a heteroselectivity of P-r = 0.98, the highest value of a magnesium-based initiator achieved to date. The kinetics study showed that the polymerization rate is first-order dependent on both monomer and initiator concentrations, and the overall rate equation is -d[LA]/dt = 3.78 M-1 s(-1) [LA][Mg]. |
| 语种 | 英语 |
| WOS记录号 | WOS:000331341900018 |
| 出版者 | AMER CHEMICAL SOC |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/50273]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Cui, Dongmei |
| 作者单位 | 1.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China 2.Univ Chinese Acad Sci, Changchun Branch, Changchun 130022, Peoples R China 3.Jinzhou City Hlth Sch, Jinzhou 121001, Liaoning, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xie, Hongyan,Mou, Zehuai,Liu, Bo,et al. Phosphinimino-amino Magnesium Complexes: Synthesis and Catalysis of Heteroselective ROP of rac-Lactide[J]. ORGANOMETALLICS,2014,33(3):722-730. |
| APA | Xie, Hongyan.,Mou, Zehuai.,Liu, Bo.,Li, Ping.,Rong, Weifeng.,...&Cui, Dongmei.(2014).Phosphinimino-amino Magnesium Complexes: Synthesis and Catalysis of Heteroselective ROP of rac-Lactide.ORGANOMETALLICS,33(3),722-730. |
| MLA | Xie, Hongyan,et al."Phosphinimino-amino Magnesium Complexes: Synthesis and Catalysis of Heteroselective ROP of rac-Lactide".ORGANOMETALLICS 33.3(2014):722-730. |
入库方式： OAI收割
来源：化学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。