Bis-Bipyridinium Gemini Surfactant-Based Supramolecular Helical Fibers and Solid State Thermochromism

Chemistry : a European Journal
Yan XuMark A Olson

Abstract

The processability and functional performance of stimuli-responsive supramolecular materials are key factors in determining their utility and potential for mass adoption, usage, and profitability. However, it is difficult to predict how structural changes to the molecular components of these systems will impact their operation. Here, a series of π-electron-deficient bis-bipyridinium gemini surfactants were synthesized and evaluated to elucidate the structure-property relationships that govern their ability to form helical-fiber-based donor-acceptor hydrogels, impact hydrogel strength, and influence their solid-state thermochromism. When combined with the π-electron-rich donor melatonin, the helical-fiber- and hydrogel-forming ability of the gemini surfactants was largely influenced by the dimensions of the rigid bridging group that connects the two bis-bipyridinium units. Dynamic viscoelastic rheology and linear sweep voltammetric analysis revealed a positive correlation between the length of the gemini-surfactant bridging group and both the hydrogel strength and the magnitude of the charge-transfer interaction between the donor-acceptor pair. Solid-state thermochromic transition temperatures of processed aerogels, xerogel film...Continue Reading

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Citations

Aug 25, 2020·Chemistry : a European Journal·Isabel S OliveiraEduardo F Marques
Jun 11, 2021·Chemical Communications : Chem Comm·Zhimin SunMark A Olson
Sep 9, 2020·Journal of the American Chemical Society·Christopher D WightBrent L Iverson
Oct 23, 2021·The Journal of Physical Chemistry. B·Shagor ChowdhuryThomas Gibaud

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