Journal
MACROMOLECULES
Volume 54, Issue 8, Pages 3845-3853Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.macromol.0c02708
Keywords
-
Categories
Funding
- U.S. Department of Energy, Office of Basic Energy Sciences, through Catalysis Science [DE-FG02-03ER15459]
Ask authors/readers for more resources
This study reports on thermoresponsive core-shell micelles as catalyst supports, which exhibit different lower critical solution temperature behavior and nanostructure size in water, demonstrating the efficiency by which the molecular brushes self-assemble into micelles. It was also found that molecular brushes with an extended backbone show higher activity and selectivity.
The manipulation and tunability of self-assembled block copolymers through external stimuli present an attractive strategy to develop smart polymer-based nanoreactors as supports for non-orthogonal tandem catalysis. We report on thermoresponsive core-shell micelles based on poly[norbornene-poly(2-methyl-2-oxazoline-block-2-propyl-2-oxazoline)]-graft-poly[norbornene L-proline] (P[NB-P(MeOx-b-PropOx)]-graft-P[NB-L-proline]) as catalyst supports for L-proline. These molecular brushes exhibit large differences in lower critical solution temperature behavior and nanostructure size in water, depending on chain lengths and proline connectivity. L-Proline-mediated aldol reactions expose the efficiency by which the molecular brushes self-assemble into micelles. Molecular brushes with an extended backbone show higher activity and selectivity, suggesting better core-shell segregation of the micelles and exclusion of water from the catalytic site. Catalytic efficiencies are not improved above the cloud point temperature, and the catalytic behavior is rather sensitive to conformational changes of the polymer chains.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available