A5001672644- Photochromic and Fluorescence Chemistry
- Advanced Polymer Synthesis and Characterization
- Gold and Silver Nanoparticles Synthesis and Applications
- Surfactants and Colloidal Systems
- Polymer Surface Interaction Studies
- Luminescence and Fluorescent Materials
- Microplastics and Plastic Pollution
- Supramolecular Self-Assembly in Materials
- Dendrimers and Hyperbranched Polymers
- Pickering emulsions and particle stabilization
- Supramolecular Chemistry and Complexes
- Photochemistry and Electron Transfer Studies
- Advanced Nanomaterials in Catalysis
- Quantum Dots Synthesis And Properties
- Radical Photochemical Reactions
- Nanocluster Synthesis and Applications
Friedrich-Alexander-Universität Erlangen-Nürnberg
2017-2025
National Renewable Energy Laboratory
2024
Imperial College London
2024
Leibniz-Institute for New Materials
2024
Environmental Energy & Engineering
2024
University of Colorado Boulder
2024
The University of Adelaide
2024
Bavarian Polymer Institute
2021-2023
pH-responsive polyamidoamine (PAMAM) dendrimers are used as well-defined building blocks to design light-switchable nano-assemblies in solution. The complex interplay between the photoresponsive di-anionic azo dye Acid Yellow 38 (AY38) and cationic PAMAM of different generations is presented this study. Electrostatic self-assembly involving secondary dipole–dipole interactions provides assemblies within a broad size range (10 nm–1 μm) with various shapes. shape these were determined using...
Multi-switchable supramolecular nano-objects that respond to irradiation of different wavelengths with changes in size and shape have been built from two water-soluble molecular switches, joined by attachment the same polyelectrolyte. Accordingly, wavelength-specific reactions, namely excited-state proton dissociation a photoacid cis-trans isomerization an azo dye, are combined one nano-object is stable aqueous solution. The concept has potential fields sensors, motors, transport.
Dendrimer–dye assemblies are used as novel supramolecular nanoreactors for the formation of various gold nanostructures. The organic–inorganic hybrid systems investigated with dynamic light scattering, UV–vis spectroscopy, and transmission electron microscopy (TEM) well cryo-TEM high-resolution TEM (HRTEM). We show that shape is determined by choice ratio building blocks. Shape size nanoparticles within controlled reducing agent. accessible range morphologies extends from small spherical,...
In this study, light-responsive nano-assemblies with light-switchable size based on photoacids are presented. Anionic disulfonated napthol derivates and cationic dendrimer macroions used as building blocks for electrostatic self-assembly. Nanoparticles already formed under the exclusion of light a result interactions. Upon photoexcitation, an excited-state dissociation photoacidic hydroxyl group takes place, which leads to more highly charged linker molecule and, subsequently, change in...
Light- and pH-responsive nano-assemblies with switchable size structure are formed by the association of a photoacid, anthocyanidin, linear polyelectrolyte in aqueous solution. Specifically, anionic disulfonated naphthol derivatives, neutral hydroxyflavylium, cationic poly(allylamine) used as building blocks for ternary electrostatic self-assembly, forming well-defined supramolecular assemblies tunable sizes 50 to 500 nm. Due network possible chemical reactions anthocyanidin excited-state...
Electrostatic self-assembly of macroions is an emerging area with great potential in the development nanoscale functional objects, where photo-irradiation responsiveness can either elevate or suppress self-assembly. The ability to control size and shape macroion assemblies would greatly facilitate fabrication desired nano-objects that be harnessed various applications such as catalysis, drug delivery, bio-sensors, actuators. Here, we demonstrate a polyelectrolyte 5 nm multivalent counterions...
The complementary use of time-resolved and steady-state spectroscopies has made it possible to describe the full reaction coordinate regarding photoisomerization NBDs featuring electron accepting PDIs.
Quadruple-switchable nanoscale assemblies are built by combining two types of water-soluble molecular photoswitches through dipole-dipole interaction. Uniting the wavelength-specific proton dissociation a photoacid and ring-opening an anionic spirooxazine results in assembly that can be addressed irradiation with different wavelengths: pH darkness.
Electrostatic self-assembly of photoacids with oppositely charged macroions yields supramolecular nano-objects in aqueous solutions, whose size is controlled through light irradiation.
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