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Authors: Xu, Fugui
Yu, Chunyang
Tries, Alexander
Zhang, Heng
Kläui, Mathias
Basse, Kristoffer
Hansen, Michael Ryan
Bilbao, Nerea
Bonn, Mischa
Wang, Hai I.
Mai, Yiyong
Title: Tunable superstructures of dendronized graphene nanoribbons in liquid phase
Online publication date: 20-Aug-2019
Year of first publication: 2019
Language: english
Abstract: In this Communication, we report the first synthesis of structurally well-defined graphene nanoribbons (gnrs) functionalized with dendritic polymers. the resultant gnrs possess grafting ratios of 0.59-0.68 for the dendrons of different generations. remarkably, the precise 3d branched conformation of the grafted dendrons affords the gnrs unprecedented 1d supramolecular self-assembly behavior in tetrahydrofuran (thf), yielding nanowires, helices and nanofibers depending on the dimension of the dendrons. the gnr superstructures in thf exhibit near-infrared absorption with maxima between 650 and 700 nm, yielding an optical bandgap of 1.2-1.3 ev. ultrafast photoconductivity analyses unveil that the helical structures exhibit the longest free carrier (3.5 ps) and exciton lifetime (several hundred ps) among the three superstructure systems. this study opens pathways for tunable construction of ordered gnr superstructures with promising optoelectronic applications.
DDC: 530 Physik
530 Physics
Institution: Johannes Gutenberg-Universität Mainz
Department: FB 08 Physik, Mathematik u. Informatik
Place: Mainz
URN: urn:nbn:de:hebis:77-publ-592003
Version: Accepted version
Publication type: Zeitschriftenaufsatz
License: In Copyright
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Journal: Journal of the American Chemical Society
Pages or article number: 10972
Publisher: American Chemical Society
Publisher place: Washington, DC
Issue date: 2019
ISSN: 1520-5126
Publisher URL:
Publisher DOI: 10.1021/jacs.9b04927
Appears in collections:JGU-Publikationen

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