Complex assembly from planar and twisted π-conjugated molecules towards alloy helices and core-shell structures

Yilong Lei, Yanqiu Sun, Yi Zhang, Hongyang Zhang, Haihua Zhang, Zhengong Meng, Wai-Yeung Wong (), Jiannian Yao () and Hongbing Fu ()
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Yilong Lei: Tianjin University
Yanqiu Sun: Institute of Chemistry, Chinese Academy of Sciences (ICCAS)
Yi Zhang: Institute of Chemistry, Chinese Academy of Sciences (ICCAS)
Hongyang Zhang: Hong Kong Baptist University
Haihua Zhang: Tianjin University
Zhengong Meng: Hong Kong Baptist University
Wai-Yeung Wong: The Hong Kong Polytechnic University
Jiannian Yao: Institute of Chemistry, Chinese Academy of Sciences (ICCAS)
Hongbing Fu: Tianjin University

Nature Communications, 2018, vol. 9, issue 1, 1-10

Abstract: Abstract Integrating together two dissimilar π-conjugated molecules into controlled complex topological configurations remains a largely unsolved problem owing to the diversity of organic species and their respective different assembly features. Here, we find that two structurally similar organic semiconductors, 9,10-bis(phenylethynyl)anthracene (BA) and 5,12-bis(phenylethynyl)naphthacene (BN), co-assemble into two-component helices by control of the growth kinetics as well as the molar ratio of BA/BN. The helical superstructures made of planar and twisted bis(phenylethynyl) derivatives can be regarded as (BA)x(BN)1−x alloys, which are formed due to compatible structural relationship between BA and BN. Moreover, epitaxial growth of (BA)x(BN)1−x alloy layer on the surface of BA tube to form BA@(BA)x(BN)1−x core-shell structure is also achieved via a solute exchange process. The precise control over composition and morphology towards organic alloy helices and core-shell microstructures opens a door for understanding the complex co-assembly features of two or more different material partners with similar structures.

Date: 2018
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DOI: 10.1038/s41467-018-06489-3

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