Solvent and catalyst-free modification of hyperbranched polyethyleneimines by ring-opening-addition or ring-opening-polymerization of: N -sulfonyl aziridines
KAUST DepartmentChemical Science Program
KAUST Catalysis Center (KCC)
Physical Science and Engineering (PSE) Division
Embargo End Date2022-04-11
Permanent link to this recordhttp://hdl.handle.net/10754/668624
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AbstractAn easy, efficient, and solvent/catalyst-free synthetic methodology was developed for the modification of hyperbranched polyethyleneimines (PEI) by ring-opening-addition or ring-opening-polymerization of N-sulfonyl aziridines. Under melting and open-flask conditions, the nucleophilic primary and secondary amino groups of PEI attack the N-sulfonyl aziridines to afford, depending on the ratio of aziridine/PEI, sulfonamide-functionalized PEIs or PEI grafted by poly(sulfonamide)s, either by ring-opening-addition or ring-opening-polymerization. Surprisingly, without any conjugated fluorophore in the system, the grafted PEIs show strong fluorescence in the solution. Besides, the amphiphilic poly(ethyleneimine sulfonamide)s present good removal efficiency of metal ions (Fe3+, Co2+, Cu2+, and Zn2+) from aqueous solutions and can be recycled without losing their adsorption efficiency after desorption. This work provides an atom-economical and facile synthetic method toward polyethyleneimine modified materials, which have unique fluorescence properties and the ability to remove hazardous metals.
CitationLi, Z., Chen, R., Wang, Y., Zhu, L., Luo, W., Zhang, Z., & Hadjichristidis, N. (2021). Solvent and catalyst-free modification of hyperbranched polyethyleneimines by ring-opening-addition or ring-opening-polymerization of N-sulfonyl aziridines. Polymer Chemistry, 12(12), 1787–1796. doi:10.1039/d1py00125f
SponsorsThis work is financially supported by the National Natural Science Foundation of China (Grant No. 21801049) and the start-up funding of Guangdong University of Technology. N.H. acknowledges the support of King Abdullah University of Science and Technology.
PublisherRoyal Society of Chemistry (RSC)