Chinese Journal of Organic Chemistry ›› 2019, Vol. 39 ›› Issue (10): 2973-2979.DOI: 10.6023/cjoc201904038 Previous Articles     Next Articles

Special Issue: 有机超分子化学合辑



王婧琳a, 沈程硕b, 唐颂超a*(), 姚远a*()   

  1. a 华东理工大学材料科学与工程学院 高分子材料与工程教研室 上海 200237
    b 上海交通大学化学化工学院 上海 200240
  • 收稿日期:2019-04-15 修回日期:2019-05-07 发布日期:2019-05-21
  • 通讯作者: 唐颂超,姚远;
  • 基金资助:
    国家自然科学基金(No. 51573088)

Study of Charge-Conjugated Self-Assembly Behavior of Amphiphilic Block Copolypeptides/Helicene

Wang, Jinglina, Shen, Chengshuob, Tang, Songchaoa*(), Yao, Yuana*()   

  1. a Teaching and Research Department of Polymer Materials and Engineering, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237
    b School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240
  • Received:2019-04-15 Revised:2019-05-07 Published:2019-05-21
  • Contact: Tang, Songchao,Yao, Yuan;
  • Supported by:
    Project supported by the National Natural Science Foundation of China(No. 51573088)

Amphiphilic block copolypeptides of polyethylene glycol-b-poly(L-glutamic acid) (PEG-b-PGlu) were synthesized to self-assemble with 4-methyl-4-aza[4]helicene onium ion (Me[4]H) in water through charge-conjugation. The morphology of the assemblies was studied by varying PGlu block length, the molar ratio of Glu unit/Me[4]H and pH value. It was found that when rigid-flexible block copolymers were assembled together with small molecules which had rigid, large size and inductive effect, they would follow a completely different law from the charge-conjugated assembly of flexible macromolecules. The self-assemblies were controlled by the π-π stacking of helicene, together with the volume fraction of the hydrophobic parts and the rigidity of PGlu segments. These effects restricted each other in the assembly process. When π-π stacking was dominant, assembly morphologies with pointer-like and strip-like planar structures were obtained.

Key words: charge-conjugated self-assembly, amphiphilic block copolymer, helicene