Alternating Copolymerization of Cyclohexene Oxide and Carbon Dioxide Catalyzed by Noncyclopentadienyl Rare-Earth Metal Bis(alkyl) Complexes
文献类型：期刊论文
| 作者 | Zhang, Zhichao1,2; Cui, Dongmei1; Liu, Xinli1 |
| 刊名 | JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
 |
| 出版日期 | 2008-10-15 |
| 卷号 | 46期号:20页码:6810-6818 |
| 关键词 | Catalysts Co2 Copolymerization Cyclohexene Oxide Polycarbonates Rare-earth Metals |
| ISSN号 | 0887-624X |
| DOI | 10.1002/pola.22989 |
| 英文摘要 | The syntheses of several dialkyl complexes based on rare-earth metal were described. Three beta-diimine compounds with varying N-aryl substituents (HL1 = (2-CH3O(C6H4))N=C(CH3)CH=C(CH3)NH(2-CH3O(C6H4)), HL2 = (2,4,6-(CH3)(3) (C6H2))N=C(CH3)CH=C(CH3)NH(2,4,6-(CH3)(3)(C6H2)), HL3 = PhN=C(CH3)CH(CH3) NHPh) were treated with Ln(CH2SiMe3)(3)(THF)(2) to give dialkyl complexes L(1)Ln (CH2SiMe3)(2) (Ln = Y (1a), Lu (1b), Sc (1c)), L(2)Ln(CH2SiMe3)(2)(THF) (Ln = Y (2a), Lu (2b)), and (LLu)-Lu-3(CH2SiMe3)(2)(THF) (3). All these complexes were applied to the copolymerization of cyclohexene oxide (CHO) and carbon dioxide as single-component catalysts. Systematic investigation revealed that the central metal with larger radii and less steric bulkiness were beneficial for the copolymerization of CHO and CO2. Thus, methoxy-modified beta-diiminato yttrium bis(alkyl) complex 1a, (LY)-Y-1(CH2SiMe3)(2), was identified as the optimal catalyst, which converted CHO and CO2 to polycarbonate with a TOF of 47.4 h(-1) in 1,4-dioxane under a 15 bar of CO2 atmosphere (T-p = 130 degrees C), representing the highest catalytic activity achieved by rare-earth metal catalyst. The resultant copolymer contained high carbonate linkages (> 99%) with molar mass up to 1.9 x 10(4) as well as narrow molar mass distribution (M-w/M-n = 1.7). (c) 2008 Wiley Periodicals, Inc. |
| 语种 | 英语 |
| WOS记录号 | WOS:000260071300014 |
| 出版者 | JOHN WILEY & SONS INC |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/65471]  |
| 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.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Zhichao,Cui, Dongmei,Liu, Xinli. Alternating Copolymerization of Cyclohexene Oxide and Carbon Dioxide Catalyzed by Noncyclopentadienyl Rare-Earth Metal Bis(alkyl) Complexes[J]. JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY,2008,46(20):6810-6818. |
| APA | Zhang, Zhichao,Cui, Dongmei,&Liu, Xinli.(2008).Alternating Copolymerization of Cyclohexene Oxide and Carbon Dioxide Catalyzed by Noncyclopentadienyl Rare-Earth Metal Bis(alkyl) Complexes.JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY,46(20),6810-6818. |
| MLA | Zhang, Zhichao,et al."Alternating Copolymerization of Cyclohexene Oxide and Carbon Dioxide Catalyzed by Noncyclopentadienyl Rare-Earth Metal Bis(alkyl) Complexes".JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY 46.20(2008):6810-6818. |
入库方式： OAI收割
来源：化学研究所
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