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System for Living ROMP of a Paramagnetic FeCl4–-Based Ionic Liquid Monomer: Direct Synthesis of Magnetically Responsive Block Copolymers
ACS Macro Letters ( IF 5.1 ) Pub Date : 2020-01-09 , DOI: 10.1021/acsmacrolett.9b00902
John J Malecha 1 , Joshua R Biller 2 , Bimala Lama 1 , Douglas L Gin 1
Affiliation  

Direct, living ring-opening metathesis polymerization of a highly paramagnetic, norbornene-based imidazolium FeCl4 ionic liquid monomer was achieved using the Grubbs third-generation catalyst and starting the polymerization off with an uncharged, nonparamagnetic norbornene monomer in a sequential block copolymerization. Preparing the paramagnetic norbornene imidazolium FeCl4 monomer in high purity was found to be crucial for enabling living polymerization behavior and generating paramagnetic diblock copolymers with predictable block lengths and compositions.

中文翻译:

顺磁性 FeCl4 基离子液体单体的活性 ROMP 系统:磁响应嵌段共聚物的直接合成

使用 Grubbs 第三代催化剂并在顺序嵌段共聚中使用不带电荷的非顺磁性降冰片烯单体开始聚合,实现了高度顺磁性、基于降冰片烯的咪唑 FeCl 4离子液体单体的直接、活性开环复分解聚合。发现制备高纯度的顺磁性降冰片烯咪唑鎓 FeCl 4单体对于实现活性聚合行为和生成具有可预测的嵌段长度和组成的顺磁性二嵌段共聚物至关重要。
更新日期:2020-01-10
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