A5040997531- Conducting polymers and applications
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Advanced Polymer Synthesis and Characterization
- biodegradable polymer synthesis and properties
- Polyoxometalates: Synthesis and Applications
- Electrochemical sensors and biosensors
- Advanced Photocatalysis Techniques
- Synthesis and properties of polymers
- Polymer Surface Interaction Studies
- Covalent Organic Framework Applications
- Analytical Chemistry and Sensors
- Polydiacetylene-based materials and applications
- Metalloenzymes and iron-sulfur proteins
- Nanoparticle-Based Drug Delivery
- MXene and MAX Phase Materials
- Catalysis and Oxidation Reactions
- Additive Manufacturing and 3D Printing Technologies
- Advanced biosensing and bioanalysis techniques
- Microfluidic and Capillary Electrophoresis Applications
- Fuel Cells and Related Materials
- Carbon dioxide utilization in catalysis
- TiO2 Photocatalysis and Solar Cells
- Polymer crystallization and properties
- Oxidative Organic Chemistry Reactions
Friedrich Schiller University Jena
2018-2024
University of Freiburg
2018
Chemical fixation of the greenhouse gas carbon dioxide with diepoxides followed by melt-phase polyaddition resulting difunctional cyclic carbonates 1,12-diaminododecane (DDA) yields semicrystalline polyhydroxurethane (PHU) thermoplastics. Also, 100% biobased PHU thermoplastics are feasible. Opposite to conventional polyurethane syntheses, neither isocyanates nor phosgene required as intermediates. Preferably, is performed in a twin-screw compounder absence catalysts, which also catalyze...
We herein introduce a versatile platform of graft copolymers featuring polyampholytic backbone and side chains varying length polarity using post-polymerization modification polydehydroalanine (PDha).
Abstract In this work, we present a new synthetic strategy for fourfold‐substituted perylene monoimides via tetrabrominated monoanhydrides. X‐ray diffraction analysis unveiled the intramolecular stacking orientation between substituents and semicircular packing behavior. We observed remarkable influence of substituent on longevity nature excited state upon visible light excitation. presence poly(dehydroalanine)‐graft‐poly(ethylene glycol) graft copolymers as solubilizing template,...
Abstract Three triggers result in two measurable outputs from polymeric sensors: multiresponsive polyampholytic graft copolymers respond to pH‐value and temperature, as well the type concentration of metal cations therefore, allow transformation external into simply (cloud point temperature (T CP ) surface plasmon resonance (SPR) encapsulated silver nanoparticles). The synthesis relies on poly(dehydroalanine) (PDha) reactive backbone gives straightforward access materials with tunable...
Polymer templates are a facile way to control the formation, size, and shape of different inorganic nanomaterials by tuning solution behavior, morphology, or density type functional groups. As novel class such templates, we herein introduce polyampholytic graft copolymers, more specifically, poly(dehydroalanine)-graft-poly(ethylene glycol) (PDha-g-PEG), which feature backbone with varying net charge densities at pH values PEG grafts, providing molecular solubility over entire range. PDha...
To obtain a set of polycaprolactones (PCL) with varying crystallinity, the triazabicyclodecene-catalyzed copolymerization two constitutional isomers ε-caprolactone (εCL) and δ-caprolactone (δCL) was carried out at room temperature in toluene. Variation feed fraction εCL from 50% to 80% detailed kinetic studies accompanied by application terminal as well nonterminal models suggested formation random copolymers. Differential scanning calorimetry wide-angle X-ray scattering investigations...
Self-assembly of polyesters like PlLA and PdLA into stereocomplexes (SCs) is an interesting approach to tailor physical properties polymeric nanoparticles without affecting their hydrophilicity. Here, we use the stereocomplexation P(lLA-stat-EtGly) P(dLA-stat-EtGly) (EtGly: 3-ethylglycolide) tune melting temperature (Tm) degree crystallinity (wc) bulk polymer. Using time-dependent blending experiments characterization techniques, such as dynamic light scattering, wide-angle X-ray...
Abstract Two different synthetic pathways give access to the amphiphilic block copolymer poly(ethylene oxide)‐ ‐poly( tert ‐butoxycarbonylaminomethylacrylate). In first approach, two end‐functionalized segments are linked via click chemistry; and in second a oxide) (PEO) based macroinitiator is chain extended atom transfer radical polymerization (ATRP). both cases linking unit consists of an amide group, which necessary effectively deprotect corresponding polymer precursor without cleavage...
We demonstrate the application of amphiphilic ionic poly(n-butylmethacrylate)-block- poly(2-(dimethylamino)ethyl methacrylate) diblock copolymers (PnBMA40-b-PDMAEMA40, PnBMA40-b-PDMAEMA120, PnBMA70-b-PDMAEMA120) for dispersing multiwalled carbon nanotubes (MWCNTs) in aqueous media, a subsequent efficient surface modification screen-printed electrodes (SPEs), and modified SPEs DNA electrochemistry. Stable fine dispersions MWCNTs were obtained with PnBMAx-b-PDMAEMAy copolymers, regardless...
An effective strategy to enhance the performance of inorganic semiconductors is moving towards organic-inorganic hybrid materials. Here, we report design core-shell materials based on a TiO
In current research, molecular light-driven catalytic units are linked to hierarchically structured soft matter matrices and used convert solar radiation into chemical reactivity for photocatalytic water splitting. This article describes the development of a simplified hydrogen evolution reaction that transfers selected results student laboratory in phenomenon-oriented manner. For this purpose, photocatalytically active system - consisting catalyst titanium dioxide, dye Eosin Y electron...
Abstract The use of organic molecules as photosensitizers in photoredox catalysis is an attractive research field it has the potential to replace conventionally used photosensitizers, which are based on rare metals. In context light‐driven hydrogen evolution catalysis, radical formation two perylene monoimide dyes (PMIs) was studied by means electron paramagnetic resonance (EPR) and UV/Vis spectroscopy. PMIs were reduced oxidized both photochemically electrochemically study changes...
Correction for ‘Polyampholytic graft copolymers based on polydehydroalanine (PDha) – synthesis, solution behavior and application as dispersants carbon nanotubes’ by J. B. Max <italic>et al.</italic>, <italic>Polym. Chem.</italic>, 2019, DOI: 10.1039/c8py01390j.