Qingshi Wu, Han Cheng, Aiping Chang, Xue Bai, Fan Lu and Weitai Wu
Chem. Commun., 2014,50, 14217-14220
DOI:
10.1039/C4CC06436D,
Communication
Copper has been immobilized on a chitosan-based responsive polymer microgel by simply stirring the microgel dispersion with copper sulfate. The ensuing catalyst is highly active for a model azide-alkyne [3+2]-cycloaddition reaction, and can be recycled at least 5 times; the catalytic activity can be tuned via swelling–deswelling transitions of the polymer gels.