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1 article(s) from Gröhn, Franziska

Multiswitchable photoacid–hydroxyflavylium–polyelectrolyte nano-assemblies

Alexander Zika and
Franziska Gröhn

Beilstein J. Org. Chem. 2021, 17, 166–185, doi:10.3762/bjoc.17.17

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Graphical Abstract

Scheme 1: The chemical network of reactions for 4-hydroxyflavylium (left) and the write-lock-erase cycle (rig...

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Scheme 2: The building blocks used for the self-assembly in this study: pelargonidin chloride (Flavy), 1-naph...

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Scheme 3: Overview of the different states of the multi-switchable system consisting of Flavy, 1N36S, and pol...

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Figure 1: Top: pelargonidin cation (Flavy) and network of chemical reactions; bottom: corresponding UV–vis sp...

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Figure 2: Characterization of Flavy: a) ¹H NMR spectrum at pH 7.0 (form A) before and after irradiation; b) ¹³...

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Scheme 4: Overview of the different states of the two main cycles switching the system consisting of 1N36S, F...

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Figure 3: UV–vis spectroscopy of the ternary nano-assemblies for cycle I (a) and cycle II (b).

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Figure 4: Dynamic light scattering: Electric field autocorrelation function g₁(τ) and distribution of relaxat...

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Figure 5: Static light scattering data from the assemblies of cycle I; a) A, non-irradiated, spherical partic...

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Figure 6: Comparison of cycle I and cycle II in AFM.

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Figure 7: a) ζ-Potential and b) effective surface charge density for cycle I; c) ζ-potential and d) effective...

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Figure 8: Isothermal titration calorimetry of poly(allylamine) into the cell containing Flavy and 1N36S in aq...

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Figure 9: Polar surface area of Flavy in form of A (left) and B (right).

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Figure 10: Hydrodynamic radii of the nano-assemblies as function of the loading ratio: a) cycle I, b) cycle II....

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Figure 11: UV–vis spectra of the nano-assemblies of cycle II at l = 0.75.

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Figure 12: ζ-Potential of the nano-assemblies of cycle II depending on the concentration ratio.

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Scheme 5: Different mixing orders of the assemblies. The major part of this study focuses on route i.

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Published 19 Jan 2021

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