Self-assembly and phase separation of amphiphilic dyads based on 4,7-bis(2-thienyl)benzothiodiazole and perylene diimide
作者:Jiang Peng、Feng Zhai、Xinyan Guo、Xinpeng Jiang、Yuguo Ma
DOI:10.1039/c3ra47633b
日期:——
To get highly ordered organic structures at the nanoscale, a series of new electronic donor–acceptor (D–A) dyads were synthesized. The dyads bearing different side chains (lipophilic or amphiphilic) or linkers (Long or Short) showed variable self-assembly behaviour. Long-linker dyads can fold in dilute solution, but the folding of short-linker dyads was not observed. Intermolecular D–A interactions and acceptor–acceptor (A–A) aggregation were proved to co-occur in chloroform for all four dyads. In the bulk state, amphiphilic dyads could overcome the intrinsic D–A interactions and achieve better D–A phase separation than lipophilic ones due to the incompatibility of the side chains. The dyad with a short-linker and amphiphilic side chains, Samphi, had the ability to form a gel, and both of the amphiphilic dyads could form nanofibres.
为获得具有高度有序的有机纳米结构,合成了一系列新型电子给体-受体(D-A)二聚体。具有不同侧链(亲脂性或两亲性)或连接子(长或短)的二聚体表现出不同的自组装行为。长连接子二聚体在稀溶液中可以折叠,但未观察到短连接子二聚体的折叠。在氯仿中,所有四种二聚体均验证了分子间D-A相互作用和受体-受体(A-A)聚集同时发生。在块体状态下,两亲性二聚体能够克服固有的D-A相互作用,由于侧链的不相容性,实现了比亲脂性二聚体更好的D-A相分离。具有短连接子和两亲性侧链的二聚体Samphi具有形成凝胶的能力,并且这两种两亲性二聚体都能形成纳米纤维。