Hydrogen-Bonded Aggregates of Oligoaramide−Poly(ethylene glycol) Block Copolymers
作者:Anne Bohle、Gunther Brunklaus、Michael R. Hansen、Tobias W. Schleuss、Andreas F. M. Kilbinger、Jens Seltmann、Hans W. Spiess
DOI:10.1021/ma100501j
日期:2010.6.8
Rod−coil copolymers with an oligomeric rod aggregate on a nanometer length scale, which is important for many applications like e.g. organic photovoltaics. However, this aggregation behavior and the driving forces such as hydrogen bonding and π−π interactions, as well as the role of side groups, are not yet fully understood. Here, we investigated these noncovalent interactions in oligo(p-benzamide)−poly(ethylene
带有低聚棒的棒-螺旋共聚物在纳米级尺度上聚集,这对于许多应用(例如有机光伏)很重要。但是,这种聚集行为和驱动力(例如氢键和π-π相互作用)以及侧基的作用尚未完全了解。在这里,我们调查的寡核苷酸,这些非共价相互作用(p-苯甲酰胺)-聚乙二醇(OPBA-PEG)共聚物,使用固态NMR,并由广角X射线散射(WAXS),差示扫描量热法(DSC)和偏振光学显微镜(POM)支持。发现更长的OPBAs形成分层的β-片状聚集体,并且它们在未取代的OPBAs和OPBA-PEG棒-螺旋共聚物中均通过酰胺氢键稳定。PEG的结合还引入液晶相。结果,改善了共聚物中的局部结构顺序。因此,通过结合不同的结构研究方法,我们能够开发液晶和固态的局部聚集和堆积模型。