Bimetallic Aluminum 5,6-Dihydro-7,7-dimethyl quinolin-8-olates as Pro-Initiators for the ROP of epsilon-CL; Probing the Nuclearity of the Active Initiator
文献类型：期刊论文
| 作者 | Zhang, QR; Zhang, WJ; Solan, GA; Liang, TL; Sun, WH
|
| 刊名 | POLYMERS
 |
| 出版日期 | 2018-07-01 |
| 卷号 | 10期号:7 |
| 关键词 | aluminum complexes ring opening polymerization epsilon-caprolactone bidentate reaction mechanism |
| ISSN号 | 2073-4360 |
| DOI | 10.3390/polym10070764 |
| 英文摘要 | Six examples of aluminum 5,6-dihydro-7,7-dimethylquinolin-8-olates, [{2-R-1-7,7-Me-2-8 -(RC9H6N)-C-2-8-O}AlR23](2) (R-1 R-2 H, R-3 = Me C1; R-1 = R-2 = H, R-3 = Et C2; R-1 = R-2 = H, R-3 = i-Bu C3; R-1 = C1, R-2 = H, R-3 = Me C4; R-1 = H, R-2 = R-3 = Me C5; R-1 = Cl, R-2 = R-3 = Me C6), have been prepared by treating the corresponding pro-ligand (L1-L4) with either AlMe3, AlEt3 or Al(i-Bu)(3). All complexes have been characterized by H-1 and C-13 NMR spectroscopy and in the case of C1 and C4 by single crystal X-ray diffraction; dimeric species are a feature of their molecular structures. In the presence of PhCH2OH (BnOH), C1-C6 displayed good control and efficiency for the ROP of epsilon-CL with almost 100% conversion achievable in 10 min at 90 degrees C; the chloro-substituted C4 and C6 notably exhibited the lowest activity of the series. However, in the absence of BnOH, C1 showed only low activity with 15% conversion achieved in 30 min forming a linear polymer capped with either a methyl or a L1 group. By contrast, when one or more equivalents of BnOH was employed in combination with C1, the resulting catalyst was not only more active but gave linear polymers capped with BnO end-groups. By using H-1 and Al-27 NMR spectroscopy to monitor solutions of C1, C1/BnOH and C1/BnOH/10 epsilon-CL over a range of temperatures, some support for a monomeric species being the active initiator at the operational temperature is presented. |
| 语种 | 英语 |
| WOS记录号 | WOS:000442528400075 |
| 出版者 | MDPI |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/41968]  |
| 专题 | 化学研究所_工程塑料实验室 |
| 作者单位 | 1.Zhang, WJ (reprint author), Beijing Inst Fash Technol, Beijing Key Lab Clothing Mat R&D & Assessment, Beijing Engn Res Ctr Text Nanofiber, Sch Mat Sci & Engn, Beijing 100029, Peoples R China. 2.Zhang, WJ 3.Solan, GA 4.Sun, WH (reprint author), Chinese Acad Sci, Inst Chem, Key Lab Engn Plast, Beijing 100190, Peoples R China. 5.Zhang, WJ 6.Solan, GA 7.Sun, WH (reprint author), Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China. 8.Solan, GA (reprint author), Univ Leicester, Dept Chem, Univ Rd, Leicester LE1 7RH, Leics, England. |
| 推荐引用方式 GB/T 7714 | Zhang, QR,Zhang, WJ,Solan, GA,et al. Bimetallic Aluminum 5,6-Dihydro-7,7-dimethyl quinolin-8-olates as Pro-Initiators for the ROP of epsilon-CL; Probing the Nuclearity of the Active Initiator[J]. POLYMERS,2018,10(7). |
| APA | Zhang, QR,Zhang, WJ,Solan, GA,Liang, TL,&Sun, WH.(2018).Bimetallic Aluminum 5,6-Dihydro-7,7-dimethyl quinolin-8-olates as Pro-Initiators for the ROP of epsilon-CL; Probing the Nuclearity of the Active Initiator.POLYMERS,10(7). |
| MLA | Zhang, QR,et al."Bimetallic Aluminum 5,6-Dihydro-7,7-dimethyl quinolin-8-olates as Pro-Initiators for the ROP of epsilon-CL; Probing the Nuclearity of the Active Initiator".POLYMERS 10.7(2018). |
入库方式： OAI收割
来源：化学研究所
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