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System for Living ROMP of a Paramagnetic FeCl4--Based Ionic Liquid Monomer: Direct Synthesis of Magnetically
John J Malecha1, Joshua R Biller2, Bimala Lama1
1Department of Chemistry, University of Colorado, Boulder, Colorado 80309, United States.
Abstract:
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.
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