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Thermal Electrocyclic Reactions: Stereochemistry

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Related Experiment Video

Updated: Apr 20, 2026

Chemical Synthesis of Porous Barium Titanate Thin Film and Thermal Stabilization of Ferroelectric Phase by Porosity-Induced Strain

Chemical Synthesis of Porous Barium Titanate Thin Film and Thermal Stabilization of Ferroelectric Phase by Porosity-Induced Strain

Published on: March 27, 2018

A bistable catanionic system with reinforced thermal stability.

Antoine Simon¹, Nicolas Martin², Jesús Fermín Ontiveros¹

¹Université De Lille, CNRS, Centrale Lille, Université Artois, UMR 8181 - UCCS - Unité De Catalyse Et Chimie Du Solide, F-59000 Lille, France.

Journal of Colloid and Interface Science

|April 18, 2026

Summary

This summary is machine-generated.

We reveal how surfactant ratios control catanionic nanodisc structure and thermal behavior. Adjusting these ratios enables a reversible transition between nanodiscs and vesicles, crucial for material design.

Keywords:

Bilayer interdigitation Bistability of self-assembly Catanionic surfactant Nanodisc

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Chemical Synthesis of Porous Barium Titanate Thin Film and Thermal Stabilization of Ferroelectric Phase by Porosity-Induced Strain

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Published on: March 27, 2018

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High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal

High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal

Published on: October 31, 2019

Area of Science:

Colloid and Surface Chemistry
Supramolecular Chemistry
Materials Science

Background:

Catanionic nanodiscs are self-assembled aggregates formed from oppositely charged surfactants.
Understanding their formation and behavior is key for developing advanced materials.
Previous studies often involved salt, complicating the interpretation of intrinsic behaviors.

Purpose of the Study:

To investigate the structural and thermal properties of true catanionic nanodiscs in a salt-free system.
To elucidate the role of molar ratio on nanodisc stability and morphology.
To establish a link between molecular packing, segregation, and structural transitions.

Main Methods:

Small-angle neutron scattering (SANS)
Static and dynamic light scattering (SLS/DLS)
Differential scanning calorimetry (DSC)
Preparation of dispersions at 1 wt% over a molar ratio range (0.25 ≤ r ≤ 0.75)

Main Results:

Nanodisc size and stability are governed by molecular edge-face segregation.
Compositional asymmetry and chain interdigitation stabilize flat nanodiscs in the crystalline state.
Heating induces a reversible transition from discs to vesicles due to suppressed interdigitation and segregation.

Conclusions:

Establishes a direct link between interdigitation, compositional segregation, and reversible structural bistability in salt-free catanionic systems.
Provides a thermodynamic framework connecting stoichiometry, molecular packing, and aggregate morphology.
Enables predictive design of stable catanionic nanodiscs by controlling surfactant ratios.