Journal
GREEN CHEMISTRY
Volume 19, Issue 4, Pages 1182-1193Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6gc02743a
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Funding
- National Natural Science Foundation of China [21476069, 21676078]
- Natural Science Foundation of Hunan Province for Distinguished Young Scholar [2016JJ1013]
- Scientific Research Fund of Hunan Provincial Education Department [13B072]
- Program for Excellent Talents in Hunan Normal University [ET14103]
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A series of bio-inspired single-chain polymeric nanoparticles (SCPNs) containing a chiral salen TiIV complex in their hydrophobic cavity were constructed from the synthesized amphiphilic copolymers of poly(NIPAAm-co-IL/Ti(salen)) (NIPAAm, N-isopropylacrylamide; IL/Ti(salen), vinylimidazolium ionic liquid-modified chiral salen TiIV complex). These SCPNs behaved as enzyme-mimetic catalysts due to compartmentalization and site isolation, mediating enantioselective oxidation of various sulfides in water with excellent yields (90-99%) and enantioselectivities (ee, 88-99%). In particular, the ee values observed for electron-rich substrates (>95% ee) represented the best results so far in titanium-salen systems. Moreover, the catalysts could be easily recovered for steady reuse by thermo-controlled separation due to thermo-responsive properties. This work first constructed titanium-containing biomimetic SCNPs for biocatalysis of enantioselective sulfoxidation in water.
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