TY - JOUR
T1 - Tunable Superstructures of Dendronized Graphene Nanoribbons in Liquid Phase
AU - Xu, Fugui
AU - Yu, Chunyang
AU - Tries, Alexander
AU - Zhang, Heng
AU - Kläui, Mathias
AU - Basse, K
AU - Hansen, Michael Ryan
AU - Bilbao, Nerea
AU - Bonn, Mischa
AU - Wang, Hai I.
AU - Mai, Yiyong
PY - 2019/7/17
Y1 - 2019/7/17
N2 - 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.
AB - 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.
UR - http://europepmc.org/abstract/med/31268310
U2 - 10.1021/jacs.9b04927
DO - 10.1021/jacs.9b04927
M3 - Article
C2 - 31268310
SN - 0002-7863
VL - 141
SP - 10972
EP - 10977
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
IS - 28
ER -