A5047717273- Supramolecular Self-Assembly in Materials
- Luminescence and Fluorescent Materials
- Diatoms and Algae Research
- Photochromic and Fluorescence Chemistry
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Photoreceptor and optogenetics research
- Advanced Polymer Synthesis and Characterization
- Molecular Sensors and Ion Detection
- Metal complexes synthesis and properties
- Gold and Silver Nanoparticles Synthesis and Applications
- Metal-Catalyzed Oxygenation Mechanisms
- Photochemistry and Electron Transfer Studies
- Electron Spin Resonance Studies
- Nanoplatforms for cancer theranostics
- Insect and Pesticide Research
- 3D Printing in Biomedical Research
- Polymer Surface Interaction Studies
- Synthesis and Biological Evaluation
- Innovative Microfluidic and Catalytic Techniques Innovation
- Pickering emulsions and particle stabilization
- Additive Manufacturing and 3D Printing Technologies
- Dendrimers and Hyperbranched Polymers
- Mycotoxins in Agriculture and Food
- Polydiacetylene-based materials and applications
Federal Institute For Materials Research and Testing
2017-2020
Friedrich-Alexander-Universität Erlangen-Nürnberg
2013-2018
The rational design of supramolecular nanoparticles by self-assembly is a crucial field research due to the wide applications and possibility control through external triggers. Understanding shape-determining factors key for tailoring with desired properties. Here, we show how thermodynamics interaction shape nanoparticle. We highlight connection between molecular structure building blocks, strength, nanoassembly shape. Nanoparticles are prepared electrostatic cationic polyelectrolyte...
A new type of light responsive nanoscale assemblies based on water-soluble spiropyrans is presented. We have synthesized four anionic bearing multiple sulfonate groups and investigated their photochromic behavior in aqueous solution. Depending the pH, either inverse photochromism (acidic conditions) or normal (alkaline found. Kinetic data for interconversion spiropyran merocyanine isomers including subsequent slow hydrolysis been obtained by UV/Vis spectroscopy. The results show that undergo...
Novel light-responsive nanoassemblies with switchable size and enzymatic activity are built from a protein water-soluble spiropyran. Assemblies created by electrostatic self-assembly in aqueous solution such that the photochromic property of spiropyran enables light responsiveness. Upon visible exposure, aggregate increases 200 to 400 nm. The enzyme retains its upon aggregation into assembly, while it decreases through irradiation. Fundamentally, we show how two different isomers, open-ring...
Abstract This study presents electrostatically self‐assembled nanoparticles from linear flexible polyelectrolytes (poly(diallyldimethylammonium chloride or quarternized poly(4‐vinylpyridine)) and an ionic photo‐isomerizable azo dye (Acid Yellow 38) that can change their size upon UV‐light irradiation. Assemblies with narrow distribution are stable in aqueous solution. For samples under‐stoichiometric load, exposure triggers a decrease, e.g. hydrodynamic radius of R h = 94 nm to 62 for...
Five newly functionalized pentaazamacrocyclic manganese complexes, with variable lengths and amounts of the aliphatic groups (three compounds one linear chain containing 12, 16, 22 carbon atoms, i.e., MnL1, MnL2, MnL3, respectively, as well two C12 C16 chains, MnL4 MnL5, respectively) that are derivatives known SOD mimetic, Mn(Me2-Pyane), have been synthesized. These amphiphilic complexes were characterized by ESI mass spectrometry, potentiometric titrations, light scattering, cyclic...
A light-triggered shape change of supramolecular nanostructures is achieved through electrostatically self-assembly linear polyelectrolytes and oppositely charged dyes in aqueous solution: Upon UV-irradiation, 1-µm-long, flexible cylinders with a cross-section 10 nm convert into ellipsoids 400 × 40 nm. The nano-object encoded the molecular dye structure.
We present a comparative study of the spectroscopic properties donor–acceptor–donor substituted dyes triphenylamine-allylidenemalononitrile-julolidine (<bold>TMJ</bold>) and triphenylamine-allylidenemalononitrile-triphenylamine (<bold>TMT</bold>), bearing one two propeller-like triphenylamine donor moieties, in solvents varying polarity viscosity aggregated solid state.
The sensitive detection of the mycotoxin citrinin (CIT) utilizing its fluorescence requires approaches to enhance emission. In this respect, we studied complexation CIT and ochratoxin A (OTA) with Al3+ in methanol using absorption spectroscopy. context, an isocratic high performance liquid chromatography (HPLC) method a polymer column detector was also developed that enables separation metal ion complexes from free ligands non-complexed Al3+. OTA showed distinct changes their properties upon...
Front Cover: Switching Shape through Light: The front cover illustrates a versatile, triggerable self-organization presented by Franziska Gröhn and colleagues in article number 1700860. Electrostatic self-assembly of polyelectrolytes light-switchable counterions leads to micrometer-long, flexible cylinders with defined nanoscale diameter, exhibiting tremendous shape change upon irradiation.