Page 94 - 《精细化工》2023年第2期
P. 94
第 40 卷第 2 期 精 细 化 工 Vol.40, No.2
20 23 年 2 月 FINE CHEMICALS Feb. 2023
催化与分离提纯技术
双核胺亚胺铝配合物的合成、结构及其
在 ε-己内酯开环聚合中的应用
3
3
3*
3
高爱红 1,2 ,赵修贤 ,游 淇 ,刘晓磊 ,姚 伟 1,3* ,蒋绪川
(1. 济南大学 水利与环境学院,山东 济南 250022;2. 青岛科技大学 山东化工研究院,山东 济南
250014;3. 济南大学 材料科学与工程学院,山东 济南 250022)
摘要:利用四齿胺亚胺配体(1R,2R)-[(NHAr)C 6 H 4 CH==N] 2 C 6 H 10 (Ⅱ:Ar=苯基,Ⅲ:Ar=2,6-二甲基苯基)与三
13
1
甲基铝反应得到了双核胺亚胺铝配合物(Ⅳ、Ⅴ)。利用 HNMR、 CNMR 和 X 射线单晶衍射仪对配合物Ⅳ、
Ⅴ结构进行了表征。通过Ⅳ、Ⅴ在苄醇(BnOH)的存在下催化 ε-己内酯开环聚合制备聚己内酯,并对反应条件
进行了优化。结果表明,配合物Ⅳ、Ⅴ具有单配体双金属中心结构,当 n(ε-己内酯)∶n(BnOH)∶n(Ⅳ或Ⅴ)=200∶
–1
4∶1 时,在 1.5 min 内 ε-己内酯转化率>97%,Ⅳ和Ⅴ的转化频率分别为 7840、9700 h ,远高于乙基桥联双核
–1
–1
胺亚胺铝配合物(1152 h )和单核胺亚胺铝配合物(2550 h );得到的聚合物相对分子质量可控,聚合反应
具有活性聚合的特点。
关键词:催化剂;铝配合物;ε-己内酯;开环聚合;胺-亚胺配体;催化技术
中图分类号:O641.4;TQ426;TQ316.3 文献标识码:A 文章编号:1003-5214 (2023) 02-0316-06
Dinuclear aluminum complexes bearing anilido-aldimine ligands:
Synthesis, structure and application in ring-opening
polymerization of ε-caprolactone
3
3*
3
3
1,2
GAO Aihong , ZHAO Xiuxian , YOU Qi , LIU Xiaolei , YAO Wei 1,3* , JIANG Xuchuan
(1. School of Water Conservancy and Environment, University of Jinan, Jinan 250022, Shandong China; 2. Chemical
Technology Academy of Shandong Province, Qingdao University of Science & Technology, Jinan 250014, Shandong,
China; 3. School of Materials Science and Engineering, University of Jinan, Jinan 250022, Shandong, China)
Abstract: Dinuclear anilido-aldimine aluminum complexes (Ⅳ, Ⅴ) were synthesized from tetradentate
anilido-aldimine chelating ligands (1R,2R)-[(NHAr)C 6H 4CH==N] 2C 6H 10 ( Ⅱ : Ar=phenyl; Ⅲ : Ar=2,
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1
6-dimethylphenyl) and Al(CH 3) 3, and characterized by HNMR, CNMR and X ray single crystal
diffractometer. The complexes Ⅳ and Ⅴ obtained were then employed to catalyze the ring-opening
polymerization of ε-caprolactone in the presence of benzyl alcohol (BnOH) to produce poly(ε-caprolactone),
and the reaction conditions were optimized. The results showed that both complexes Ⅳ and Ⅴ displayed
single ligand bimetallic center structure. The conversion rate exceeded 97% within 1.5 min when
n(ε-caprolactone)∶n(BnOH)∶n(Ⅳ or Ⅴ)=200∶4∶1. Moreover, the turn over frequency for Ⅳ was
–1
7840 and 9700 h for Ⅴ, much higher than those of ethyl-bridged binuclear anilido-aldimine aluminum
–1
–1
complex (1152 h ) and mononuclear amine-imine aluminum complex (2550 h ). The relative molecular
mass of the polymer obtained was controllable, and the polymerization reaction showed the characteristics
of active polymerization.
Key words: catalyst; aluminum complex; ε-caprolactone; ring-opening polymerization; anilido-aldimine
ligands; catalysis technology
收稿日期:2022-05-17; 定用日期:2022-09-22; DOI: 10.10.13550/j.jxhg.20220469
作者简介:高爱红(1980—),女,博士,高级工程师,E-mail:hg078@qust.edu.cn。联系人:姚 伟(1980—),男,博士,副教授,
E-mail:stu_yaow@ujn.edu.cn;蒋绪川(1969—),男,博士,教授,E-mail:ism_jiangxc@ujn.edu.cn。