Stimuli-responsive Supramolecular Gels Based on the Self-Assembly of stigmasterol-ferrocene derivative

Gels prepared from low-molecular-weight gelators (LMWGs) represent versatile soft materials. Self-assembly of LMWGs forms nanofibers and above critical gelation concentrations, the entanglement of which leads to self-supporting gels. Owing to the dynamic properties of the self-assembly process, stimuli-responsive LMWGs have prospered in the last decade. In addition, incorporating multiple LMWGs into one system brings the opportunity to achieve sophisticated designs and functions. This review covers recent advances in the field of supramolecular gels, from stimuli-responsive gelators to multicomponent systems that are self-sorting and/or co-assembling.

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Ferro-self-assembly: magnetic and electrochemical adaptation of a multiresponsive zwitterionic metalloamphiphile showing a shape-hysteresis effect

Chemical Science ◽

10.1039/d0sc05249c ◽

2021 ◽

Vol 12 (1) ◽

pp. 270-281

Author(s):

Stefan Bitter ◽

Moritz Schlötter ◽

Markus Schilling ◽

Marina Krumova ◽

Sebastian Polarz ◽

...

Keyword(s):

Magnetic Field ◽

Light Scattering ◽

Dynamic Light Scattering ◽

Real Time ◽

Self Assembly ◽

Hysteresis Effect ◽

The Self ◽

Self Organization ◽

Stimuli Responsive ◽

Optical Birefringence

The self-organization properties of a stimuli responsive amphiphile can be altered by subjecting the paramagnetic oxidized form to a magnetic field of 0.8 T and monitored in real time by coupling optical birefringence with dynamic light scattering.

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Ferro-Self-Assembly: Magnetic and Electrochemical Adaptation of a Multiresponsive Zwitterionic Metalloamphiphile Showing a Shape-Hysteresis Effect

10.26434/chemrxiv.12370406 ◽

2020 ◽

Author(s):

Stefan Bitter ◽

Moritz Schlötter ◽

Markus Schilling ◽

Rainer Winter ◽

Sebastian Polarz

Keyword(s):

Magnetic Field ◽

External Magnetic Field ◽

Self Assembly ◽

Hysteresis Effect ◽

The Self ◽

Stimuli Responsive ◽

Tubular Aggregates ◽

Optical Birefringence ◽

Sufficient Concentration

We report on a novel multi-stimuli-responsive amphiphile, 1-(Z)-heptenyl-1’-dimethylammonium-methyl-(3-sulfopropyl)ferrocene (6), whose self-assembly properties can be altered by three different stimuli, namely: (i) the addition of external salts which serve to unfold the sultone headgroup, thus triggering self-assembly of 6 into vesicles; (ii) oxidation to 6+, which changes the lipophilic ferrocene to a hydrophilic ferrocenium entity, thereby broadening the size-distribution of the aggregates; and (iii) exposition of 6+ to an external magnetic field of 0.8 T. Under thease conditions and at sufficient concentration, 6+ forms large, tubular aggregates with lengths of up to 15 µm, which persist for over 5 min after the field is switched off again. 6+ is thus the first amphiphile to exhibit a shape-hysteresis effect. The self-assembly/disassembly processes and their dynamics were studied live and in situ by optical birefringence measurements coupled to light scattering.

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Nanoscale metallogel via self-assembly of self-assembled trinuclear coordination rings: multi-stimuli-responsive soft materials

Dalton Transactions ◽

10.1039/c4dt03715d ◽

2015 ◽

Vol 44 (34) ◽

pp. 15181-15188 ◽

Cited By ~ 23

Author(s):

Sudhakar Ganta ◽

Dillip Kumar Chand

Keyword(s):

Self Assembly ◽

Soft Materials ◽

The Self ◽

Stimuli Responsive ◽

Self Assembled

A multi-stimuli-responsive metallogel is obtained by the self-assembly of an already self-assembled trinuclear palladium(ii) based coordination ring of the rare M3L6 composition.

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Healable terpyridine-based supramolecular gels and the luminescent properties of the rare earth metal complex

New Journal of Chemistry ◽

10.1039/c7nj03175k ◽

2017 ◽

Vol 41 (24) ◽

pp. 15173-15179 ◽

Cited By ~ 6

Author(s):

Hewei Yang ◽

An Wang ◽

Limin Zhang ◽

Xinyu Zhou ◽

Guang Yang ◽

...

Keyword(s):

Rare Earth ◽

Metal Complex ◽

Rare Earth Metal ◽

Self Assembly ◽

Earth Metal ◽

Luminescent Properties ◽

The Self ◽

Supramolecular Gels ◽

Rare Earth Metal Complex ◽

The Rare Earth

The self-assembly pattern of terpyridine-based gelator C6S is proposed and the multicolor luminescent metallogel C6S–Eu/Tb investigated.

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Stimuli-Responsive Supramolecular Gels Constructed by Hierarchical Self-Assembly Based on Metal-Ligand Coordination and Host-Guest Recognition

Macromolecular Rapid Communications ◽

10.1002/marc.201800465 ◽

2018 ◽

Vol 39 (22) ◽

pp. 1800465 ◽

Cited By ~ 2

Author(s):

Yin-Hsuan Lee ◽

Lipeng He ◽

Yi-Tsu Chan

Keyword(s):

Self Assembly ◽

Stimuli Responsive ◽

Supramolecular Gels ◽

Ligand Coordination ◽

Metal Ligand

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Modulating the Self-Assembly of Calix[4]azacrowns to Design Materials with Improved Emission and Stimuli-Responsive Behavior

The Journal of Physical Chemistry C ◽

10.1021/jp5039392 ◽

2014 ◽

Vol 118 (24) ◽

pp. 13118-13125 ◽

Cited By ~ 8

Author(s):

Issam Oueslati ◽

José A. Paixão ◽

Vitor H. Rodrigues ◽

Aleksander Shkurenko ◽

Barbara Leśniewska ◽

...

Keyword(s):

Self Assembly ◽

The Self ◽

Stimuli Responsive ◽

Responsive Behavior ◽

Design Materials

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Synthesis and Self-Assembly Properties of Bola-Amphiphilic Glycosylated Lipopeptide-Type Supramolecular Hydrogels Showing Colour Changes Along with Gel–Sol Transition

International Journal of Molecular Sciences ◽

10.3390/ijms22041860 ◽

2021 ◽

Vol 22 (4) ◽

pp. 1860

Author(s):

Naoki Tsutsumi ◽

Akitaka Ito ◽

Azumi Ishigamori ◽

Masato Ikeda ◽

Masayuki Izumi ◽

...

Keyword(s):

Self Assembly ◽

Soft Materials ◽

The Self ◽

Low Molecular Weight ◽

Stimuli Responsive ◽

Short Peptide ◽

Peptide Moiety ◽

Colour Changes ◽

Reversible Thermochromism ◽

Significant Attention

Supramolecular hydrogels formed by self-assembly of low-molecular-weight amphiphiles (hydrogelators) have attracted significant attention, as smart and soft materials. However, most of the observed stimuli-responsive behaviour of these supramolecular hydrogels are limited to gel–sol transitions. In this study, we present bola-amphiphilic glycosylated lipopeptide-type supramolecular hydrogelators that exhibit reversible thermochromism along with a gel–sol transition. The bola-amphiphiles have mono-, di-, tri- or tetra-phenylalanine (F) as a short peptide moiety. We investigate and discuss the effects of the number of F residues on the gelation ability and the morphology of the self-assembled nanostructures.

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