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

2014 ◽  
Vol 118 (24) ◽  
pp. 13118-13125 ◽  
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

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

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.

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

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-(<i>Z</i>)-heptenyl-1’-dimethylammonium-methyl-(3-sulfopropyl)ferrocene<b> </b>(<b>6</b>), 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 <b>6</b> into vesicles; (ii) oxidation to <b>6<sup>+</sup></b>, which changes the lipophilic ferrocene to a hydrophilic ferrocenium entity, thereby broadening the size-distribution of the aggregates; and (iii) exposition of <b>6<sup>+</sup> </b>to an external magnetic field of 0.8 T. Under thease conditions and at sufficient concentration, <b>6</b><sup><b>+</b> </sup>forms large, tubular aggregates with lengths of up to 15 µm, which persist for over 5 min after the field is switched off again. <b>6<sup>+</sup></b> 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. <br>

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

2015 ◽  
Vol 44 (34) ◽  
pp. 15181-15188 ◽  
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.

scholarly journals Self-assembly of photoresponsive azo-containing phospholipids with a polar group as the tail

RSC Advances ◽  
2020 ◽  
Vol 10 (54) ◽  
pp. 32984-32991
Author(s):  
Su Ma ◽  
Seiji Kurihara ◽  
Yasuhiro Tomimori ◽  
Sunnam Kim ◽  
Eunsang Kwon ◽  
...  
Keyword(s):  
Visible Light ◽  
Self Assembly ◽  
Polar Group ◽  
Stimuli Responsive ◽  
Light Stimuli ◽  
Responsive Behavior

A mixture of a nitro- and methoxy-substituted azo-containing phospholipids without long alkyl tails formed vesicles showing visible light stimuli-responsive behavior. Release of encapsulated calcein from the vesicles was triggered by visible light.

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

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.

Responsive filtration membranes by polymer self-assembly

TECHNOLOGY ◽  
2016 ◽  
Vol 04 (04) ◽  
pp. 217-228 ◽  
Author(s):  
Papatya Kaner ◽  
Prity Bengani-Lutz ◽  
Ilin Sadeghi ◽  
Ayse Asatekin
Keyword(s):  
Self Assembly ◽  
Performance Parameters ◽  
Stimuli Responsive ◽  
Membrane Filters ◽  
Filtration Membranes ◽  
Chemical Manufacturing ◽  
Responsive Membranes ◽  
Responsive Behavior ◽  
Scalable Methods ◽  
External Stimuli

Membrane technologies are essential for water treatment, bioprocessing and chemical manufacturing. Stimuli-responsive membranes respond to changes in feed conditions (e.g., temperature, pH) or external stimuli (e.g., magnetic field, light) with a change in performance parameters (permeability, selectivity). This enables new functionalities such as tunable performance, self-cleaning and smart-valve behavior. Polymer self-assembly is a crucial tool for manufacturing such membranes using scalable methods, enabling easier commercialization. This review surveys approaches to impart stimuli responsive behavior to membrane filters using polymer self-assembly.

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

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-(<i>Z</i>)-heptenyl-1’-dimethylammonium-methyl-(3-sulfopropyl)ferrocene<b> </b>(<b>6</b>), 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 <b>6</b> into vesicles; (ii) oxidation to <b>6<sup>+</sup></b>, which changes the lipophilic ferrocene to a hydrophilic ferrocenium entity, thereby broadening the size-distribution of the aggregates; and (iii) exposition of <b>6<sup>+</sup> </b>to an external magnetic field of 0.8 T. Under thease conditions and at sufficient concentration, <b>6</b><sup><b>+</b> </sup>forms large, tubular aggregates with lengths of up to 15 µm, which persist for over 5 min after the field is switched off again. <b>6<sup>+</sup></b> 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. <br>

Self-assembly and multi-stimuli responsive behavior of PAA-b-PAzoMA-b-PNIPAM triblock copolymers

2017 ◽  
Vol 8 (48) ◽  
pp. 7529-7536 ◽  
Author(s):  
Fei Gao ◽  
Yaohui Xing ◽  
Yuan Yao ◽  
Liuying Sun ◽  
Yao Sun ◽  
...  
Keyword(s):  
Self Assembly ◽  
Triblock Copolymer ◽  
Triblock Copolymers ◽  
Temperature Sensitive ◽  
Stimuli Responsive ◽  
Responsive Behavior ◽  
Spherical Micelles

A PAA-b-PAzoMA-b-PNIPAM triblock copolymer containing pH, photo and temperature sensitive groups could self-assemble into spherical micelles or vesicles with multi-stimuli responsiveness.

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