Retraction: Metal-free [2+2+1] cycloaddition polymerization of alkynes, nitriles, and oxygen atoms to functional polyoxazoles.
RSC Adv. 2021 Apr 30;11(27):16200. doi: 10.1039/d1ra90113c. eCollection 2021 Apr 30.
RSC Adv. 2021.
PMID: 35481959
Free PMC article.