期刊
MACROMOLECULES
卷 44, 期 18, 页码 7233-7241出版社
AMER CHEMICAL SOC
DOI: 10.1021/ma201256m
关键词
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资金
- EPSRC
- Royal Society
- Homerton College
- Department of Chemistry
- NIH-NCRR COBRE [P20RR017716]
- NIST, U.S. Department of Commerce [70NANB7H6178]
- Advantage West Midlands (AWM)
- European Regional Development Fund (ERDF)
- Engineering and Physical Sciences Research Council [EP/G004897/1] Funding Source: researchfish
- EPSRC [EP/G004897/1] Funding Source: UKRI
We have prepared a range of well-defined copolymers of styrene and L-proline functionalized styrene (5-11 kDa) using reversible addition-fragmentation chain transfer (RAFT) polymerization techniques and explored their use in supported catalysis. Upon deprotection of the L-proline functionalities, the solution self-assembly of these copolymers was investigated in mixed solvent systems. The resulting assemblies were characterized by dynamic light scattering, transmission electron microscopy (on graphene oxide substrates, along with cryo-TEM and tomography), and scanning electron microscopy. The application of these functional assemblies as supported catalysts for the aldol condensation reaction was explored using cyclohexanone and 4-nitrobenzaldehyde. The rate and selectivity of solution catalysis in our self-assembled system were comparable to those of L-proline, and a significant advantage of our system was that the polymer support could be utilized at lower catalyst loadings with comparable activity and also could be recycled a number of times while maintaining activity and selectivity.
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