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Two helices from one chiral centre – self organization of disc shaped chiral nanoparticles

Mehl, Georg H.; Yu, Huanan; Qu, Wentao; Liu, Feng


Huanan Yu

Wentao Qu

Feng Liu


Gold nanoparticles (AuNPs) have been prepared and surfacefunctionalized
with a mixture of 1-hexanethiol co-ligands and chiral
discogen ligands separated from a disulfide function via a flexible
spacer. Polarized optical microscopy together with differential
scanning calorimetry showed that the organic corona of the
nanocomposite forms a stable chiral discotic nematic (ND*) phase
with a wide thermal range. Synchrotron X-ray diffraction showed
that gold NPs form a superlattice with p2 plane symmetry. Analysis
indicated that the corona takes up the shape of a flexible
macrodisk. Synchrotron radiation-based circular dichroism signals
of thin films are significantly enhanced on the isotropic-LC
transition in line with the formation of a chiral nematic phase of the
organic corona. At lower temperatures the appearance of CD
signals associated with the NPs is indicative of the formation of a
second helical structure. The decreased volume required and the
chiral environment of the disc ligands drives the nanoparticles into
columns that arrange helically parallel to the shortest axis of the
two dimensional lattice.


Mehl, G. H., Yu, H., Qu, W., & Liu, F. (2020). Two helices from one chiral centre – self organization of disc shaped chiral nanoparticles. Chemical science, 12(5), 1778-1782.

Journal Article Type Article
Acceptance Date Nov 30, 2020
Online Publication Date Dec 8, 2020
Publication Date Dec 8, 2020
Deposit Date Dec 8, 2020
Publicly Available Date Oct 27, 2022
Journal Chemical Science
Print ISSN 2041-6520
Electronic ISSN 2041-6539
Publisher Royal Society of Chemistry
Peer Reviewed Peer Reviewed
Volume 12
Issue 5
Pages 1778-1782
Public URL
Publisher URL!divAbstract


Accepted article (1.9 Mb)

Copyright Statement
© The Royal Society of Chemistry 2021. This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence.View Article OnlineDOI: 10.1039/D0SC05100D

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