10.1021/acs.langmuir.7b01259.s001
Jing Zhang
Jing
Zhang
Xiaofei Chen
Xiaofei
Chen
Wen Li
Wen
Li
Bao Li
Bao
Li
Lixin Wu
Lixin
Wu
Solvent Dielectricity-Modulated Helical Assembly and
Morphologic Transformation of Achiral Surfactant-Inorganic Cluster
Ionic Complexes
American Chemical Society
2017
cluster
SEM
helical self-assemblies
TEM
Solvent Dielectricity-Modulated Helical Assembly
Achiral Surfactant-Inorganic Cluster
Morphologic Transformation
lamellar aggregations
IR spectra
assembly
XRD
bilayer substructure
Lindqvist-type polyoxomolybdate
complexes self-assembled
helical ribbons
1 H NMR
flower-like assemblies
self-assembled morphology
dielectric
helical assemblies
chirality-directed functionalization
achiral polyoxometalate complexes
2017-10-19 00:00:00
Journal contribution
https://acs.figshare.com/articles/journal_contribution/Solvent_Dielectricity-Modulated_Helical_Assembly_and_Morphologic_Transformation_of_Achiral_Surfactant-Inorganic_Cluster_Ionic_Complexes/5545354
Ionic
complexes comprising single/double chain cationic surfactant
and Lindqvist-type polyoxomolybdate anionic cluster were used for
controlled self-assembly in organic solutions. In the solvent with
low dielectric constant the complexes self-assembled into flat ribbon
like lamellar aggregations with an inverse bilayer substructure where
the cluster located at the middle. Under the condition of increased
dielectric constant, the solvent triggered the formation of helical
self-assemblies, which finally transformed from helical ribbons to
the flower-like assemblies due to the bilayer becoming excessively
twisted. The self-assembled morphology and the substructure were characterized
by SEM, TEM, and XRD. The solvent dielectricity-controlled morphologic
transformations modulated by the variation of electrostatic interactions
between organic cations and inorganic polyanions were demonstrated
by <sup>1</sup>H NMR and IR spectra. The strategy in this work represents
an effective route in targeting the chirality-directed functionalization
of inorganic clusters by combining controllable and helical assemblies
of achiral polyoxometalate complexes in one system.