Direct synthesis of cucurbit[5]uril-anchored polyacrylic acid microspheres and potential applications in selective sorptionElectronic supplementary information (ESI) available. See DOI: 10.1039/c5ra03418c

• Main Authors: Xiao, Bo, Fan, Ying, Gao, Rui-han, Chen, Peng, Zhang, Jian-xin, Zhou, Qing-di, Xue, Sai-Feng, Zhu, Qian-Jiang, Tao, Zhu
• Format: Article
• Language: English
• ISSN: 2046-2069
• DOI: 10.1039/c5ra03418c

A one-pot strategy was employed to synthesize a series of cucurbit[5]uril-anchored (Q[5]-anchored) polymers with high yields. The acrylic acid (AA) monomer, an ammonium persulfate salt (APS) initiator, and an oxidant were used in the polymerization. The Q[5]-anchored polyacrylic acid aggregates (Q[5]-PAA) have been characterized by 1 H NMR, 13 C NMR, 2D NMR, FTIR, TGA, GPC, TEM and SEM measurements. The experimental results confirm that PAA chains can be grafted to Q[5] in a controlled manner through an in situ radical polymerization approach. The effects of acrylic acid and Q[5] feed mass and APS concentration on the formation of polymer nanocapsules have been investigated. The experiments reveal that the feed mass of acrylic acid greatly influences the properties of Q[5]-PAA when the ratio of Q[5]/APS is fixed at 0.5. In particular, when APS/Q[5] = 46 and 72, vesicle structures are observed in the Q[5]-anchored polymers. Moreover, such polymer nanocapsules show selective absorption of some volatile compounds, particularly methanol. A one-pot strategy was employed to synthesize cucurbit[5]uril-anchored polymers which show high selective sorption for methanol.