Influences of Fluorine Substituents on Iminopyridine Fe(II)- and Co(II)-Catalyzed Isoprene Polymerization
文献类型：期刊论文
| 作者 | Zhu, Guangqian1; Zhang, Xianhui2,3; Zhao, Mengmeng2; Wang, Liang2; Jing, Chuyang2,3; Wang, Peng1; Wang, Xiaowu2; Wang, Qinggang2
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| 刊名 | POLYMERS
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| 出版日期 | 2018-09-01 |
| 卷号 | 10期号:9页码:15 |
| 关键词 | iminopyridine ligands Fe(II) Co(II) complexes isoprene polymerization fluorinated aryl substituents |
| ISSN号 | 2073-4360 |
| DOI | 10.3390/polym10090934 |
| 英文摘要 | A series of iminopyridine complexes of Fe(II) and Co(II) complexes bearing fluorinated aryl substituents were synthesized for the polymerization of isoprene. The structures of complexes 3a, 2b and 3b were determined by X-ray diffraction analysis. Complex 3a contained two iminopyridine ligands coordinated to the iron metal center forming an octahedral geometry, whereas 2b adopted a chloro-bridged dimer, and 3b featured with two patterns of cobalt centers bridged via chlorine atoms. Complexes 2b and 3b represented rare examples of chlorine bridged bimetallic Co(II) complexes. The fluorine substituents effects, particularly on catalytic activity and polymer properties such as molecular weight and regio -/ stereo-selectivity were investigated when these complexes were employed for isoprene polymerization. Among the Fe(II)/methylaluminoxane (MAO) systems, the 4-CF3 substituted iminopyridine Fe(II) complex 1a was found as a highly active isoprene polymerization catalyst exhibiting the highest activity of 10(6) g . (mol of Fe)(-1) . h(-1). The resultant polymer displayed lower molecular weight (Mn = 3.5 x 10(4) g/mol) and moderate polydispersity index (PDI = 2.1). Furthermore, the ratio of cis-1,4-/3,4 was not affected by the F substituents. In the series of Co(II)/AlEt2Cl binary systems, complexes containing electron-withdrawing N-aryl substituents (R = 4-CF3, 2,6-2F) afforded higher molecular weights polyisoprene than that was obtained by the complex containing electron-donating N-alkyl substituents (R = octyl). However, ternary components system, complex/MAO/[Ph3C][B(C6F5)(4)] resulted in low molecular weight polyisoprene (M-n < 2000) with high trans-1,4-unit (> 95%). |
| WOS关键词 | OF-THE-ART ; ETHYLENE OLIGOMERIZATION ; CATIONIC-POLYMERIZATION ; CONJUGATED DIENES ; COBALT COMPLEXES ; CATALYSTS ; IRON ; LIGANDS ; STEREOSELECTIVITY ; POLYISOPRENE |
| 资助项目 | "135" Projects Fund of CAS-QIBEBT Director Innovation Foundation ; National Natural Science Foundation of China (NSFC)[21702215] ; DICP& QIBEBT United Foundation[UN 201701] |
| WOS研究方向 | Polymer Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000449988800003 |
| 出版者 | MDPI |
| 资助机构 | "135" Projects Fund of CAS-QIBEBT Director Innovation Foundation ; National Natural Science Foundation of China (NSFC) ; DICP& QIBEBT United Foundation |
| 源URL | [http://ir.qibebt.ac.cn/handle/337004/10995]  |
| 专题 | 中国科学院青岛生物能源与过程研究所 |
| 通讯作者 | Wang, Peng; Wang, Xiaowu; Wang, Qinggang |
| 作者单位 | 1.Shandong Univ Sci & Technol, Sch Chem & Environm Engn, Qingdao 266590, Peoples R China 2.Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Key Lab Biobased Mat, Qingdao 266101, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhu, Guangqian,Zhang, Xianhui,Zhao, Mengmeng,et al. Influences of Fluorine Substituents on Iminopyridine Fe(II)- and Co(II)-Catalyzed Isoprene Polymerization[J]. POLYMERS,2018,10(9):15. |
| APA | Zhu, Guangqian.,Zhang, Xianhui.,Zhao, Mengmeng.,Wang, Liang.,Jing, Chuyang.,...&Wang, Qinggang.(2018).Influences of Fluorine Substituents on Iminopyridine Fe(II)- and Co(II)-Catalyzed Isoprene Polymerization.POLYMERS,10(9),15. |
| MLA | Zhu, Guangqian,et al."Influences of Fluorine Substituents on Iminopyridine Fe(II)- and Co(II)-Catalyzed Isoprene Polymerization".POLYMERS 10.9(2018):15. |
入库方式： OAI收割
来源：青岛生物能源与过程研究所
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