Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China.
Macromol Rapid Commun. 2022 Sep;43(18):e2200191. doi: 10.1002/marc.202200191. Epub 2022 Jun 8.
Complex coacervates are usually formed through electrostatic attraction between oppositely charged polyelectrolytes, with a few exceptions such as coacervates of like-charge proteins and polyelectrolytes, both in vivo and in vitro. Understanding of the preparation and mechanisms of these coacervates is limited. Here, a positively charged poly(ionic liquid), poly(1-vinyl-3-benzylimidazolium chloride) (PILben), is designed that bears benzene rings in repeating units. Fluidic coacervates are prepared by mixing the PILben aqueous solution with a like-charge poly(ionic liquid) named poly(dimethyl diallyl ammonium chloride) (PDDA). The effects of polymer concentration, temperature, and ionic strength in the PILben-PDDA coacervate are studied. Raman spectroscopy and 2D H- C heteronuclear single quantum coherence ( H- C HSQC) characterizations verify that the coacervate formation benefits from the cation-π interaction between PILben and PDDA. This work provides principles and understandings of designing coacervates derived from like-charge poly(ionic liquids) with high charge density.
复杂凝聚物通常通过带相反电荷的聚电解质之间的静电吸引形成，也有一些例外，如体内和体外的带相同电荷的蛋白质和聚电解质的凝聚物。对这些凝聚物的制备和机制的理解有限。在这里，设计了一种带正电荷的聚（离子液体），聚（1-乙烯基-3-苄基咪唑氯化物）（PILben），其重复单元中带有苯环。通过将 PILben 水溶液与带相同电荷的聚（离子液体）聚（二甲基二烯丙基氯化铵）（PDDA）混合来制备流变体凝聚物。研究了聚合物浓度、温度和 PILben-PDDA 凝聚物中离子强度的影响。拉曼光谱和 2D H- C 异核单量子相干（ H- C HSQC）特性证实了凝聚物的形成得益于 PILben 和 PDDA 之间的阳离子-π相互作用。这项工作为设计具有高电荷密度的带相同电荷的聚（离子液体）凝聚物提供了原理和理解。
