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

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Chemical Science. Royal Society of Chemistry (RSC). 2021, 12(1), pp. 270-281. ISSN 2041-6520. eISSN 2041-6539. Available under: doi: 10.26434/chemrxiv.12370406.v1

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Metallosurfactants are molecular compounds which combine the unique features of amphiphiles, like their capability of self-organization, with the peculiar properties of metal complexes like magnetism and a rich redox chemistry. Considering the high relevance of surfactants in industry and science, amphiphiles that change their properties on applying an external trigger are highly desirable. A special feature of the surfactant reported here, 1-(Z)-heptenyl-1′-dimethylammonium-methyl-(3-sulfopropyl)ferrocene (6), is that the redox-active ferrocene constituent is in a gemini-position. Oxidation to 6+ induces a drastic change of the surfactant's properties accompanied by the emergence of paramagnetism. The effects of an external magnetic field on vesicles formed by 6+ and the associated dynamics were monitored in situ using a custom-made optical birefringence and dual dynamic light scattering setup. This allowed us to observe the optical anisotropy as well as the anisotropy of the diffusion coefficient and revealed the field-induced formation of oriented string-of-pearls-like aggregates and their delayed disappearance after the field is switched off.

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ISO 690BITTER, Stefan, Moritz SCHLÖTTER, Markus SCHILLING, Marina KRUMOVA, Sebastian POLARZ, Rainer F. WINTER, 2021. Ferro-self-assembly : magnetic and electrochemical adaptation of a multiresponsive zwitterionic metalloamphiphile showing a shape-hysteresis effect. In: Chemical Science. Royal Society of Chemistry (RSC). 2021, 12(1), pp. 270-281. ISSN 2041-6520. eISSN 2041-6539. Available under: doi: 10.26434/chemrxiv.12370406.v1
BibTex
@article{Bitter2021Ferro-51321,
  year={2021},
  doi={10.26434/chemrxiv.12370406.v1},
  title={Ferro-self-assembly : magnetic and electrochemical adaptation of a multiresponsive zwitterionic metalloamphiphile showing a shape-hysteresis effect},
  number={1},
  volume={12},
  issn={2041-6520},
  journal={Chemical Science},
  pages={270--281},
  author={Bitter, Stefan and Schlötter, Moritz and Schilling, Markus and Krumova, Marina and Polarz, Sebastian and Winter, Rainer F.}
}
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