Uniform two-dimensional square assemblies from conjugated block copolymers driven by π–π interactions with controllable sizes

Han, Liang; Wang, Meijing; Jia, Xiangmeng; Chen, Wei; Qian, Hujun; He, Feng

doi:10.1038/s41467-018-03195-y

Uniform two-dimensional square assemblies from conjugated block copolymers driven by π–π interactions with controllable sizes

Journal Article · Wed Feb 28 00:00:00 EST 2018 · Nature Communications

DOI:https://doi.org/10.1038/s41467-018-03195-y· OSTI ID:1426240

Han, Liang ^[1]; Wang, Meijing ^[1]; Jia, Xiangmeng ^[2]; ^[3]; Qian, Hujun ^[2]; ^[1]

Southern Univ. of Science and Technology, Shenzhen (China). Dept. of Chemistry
Jilin Univ., Changchun (China). State Key Lab. of Supramolecular Structure and Materials, Inst. of Theoretical Chemistry
Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division; Univ. of Chicago, IL (United States). Inst. of Molecular Engineering

Two-dimensional (2-D) micro- and nano- architectures are attractive because of their unique properties caused by their ultrathin and flat morphologies. However, the formation of 2-D supramolecular highly symmetrical structures with considerable control is still a major challenge. Here, we presented a simple approach for the preparation of regular and homogeneous 2-D fluorescent square noncrystallization micelles with conjugated diblock copolymers PPV₁₂-b-P2VP_n through a process of dissolving-cooling-aging. The scale of the formed micelles could be controlled by the ratio of PPV/P2VP blocks and the concentration of the solution. The forming process of the platelet square micelles was analyzed by UV-Vis, DLS and SLS, while the molecular arrangement was characterized by GIXD. The results revealed that the micelles of PPV₁₂-b-P2VP_n initially form 1-D structures and then grow into 2-D structures in solution, and the growth is driven by intermolecular π-π interactions with the PPV₁₂ blocks. The formation of 2-D square micelles is induced by herringbone arrangement of the molecules, which is closely related to the presence of the branched alkyl chains attached to conjugated PPV₁₂ cores.

View Accepted Manuscript (DOE)

Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: National Natural Science Foundation of China (NSFC); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 1426240

Journal Information:: Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 9; ISSN 2041-1723

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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