A5024667096- Conducting polymers and applications
- Electrochemical sensors and biosensors
- Analytical Chemistry and Sensors
- Electrochemical Analysis and Applications
- Advanced Sensor and Energy Harvesting Materials
- Luminescence and Fluorescent Materials
- Chemistry and Chemical Engineering
- Organic and Molecular Conductors Research
- Porphyrin and Phthalocyanine Chemistry
- Metal-Organic Frameworks: Synthesis and Applications
- Fuel Cells and Related Materials
- Organic Light-Emitting Diodes Research
- Molecular Sensors and Ion Detection
- Supercapacitor Materials and Fabrication
- Dendrimers and Hyperbranched Polymers
- Supramolecular Chemistry and Complexes
- Synthesis and Properties of Aromatic Compounds
- Graphene and Nanomaterials Applications
- Nanoparticle-Based Drug Delivery
- Magnetism in coordination complexes
- Graphene research and applications
- Chemical Reaction Mechanisms
- Molecular Junctions and Nanostructures
Czech Academy of Sciences, J. Heyrovský Institute of Physical Chemistry
2020-2021
Czech Academy of Sciences, Institute of Macromolecular Chemistry
2013-2019
Czech Academy of Sciences
2015
Charles University
2011-2012
Nanocomposites of graphene materials and conducting polymers have been extensively studied as promising for electrodes supercapacitors. Here, we present a graphene/polyaniline heterostructure consisting CVD-graphene polyaniline monolayer its electrochemical operation in supercapacitor. The synthesis employs functionalization by p-phenylene sulfonic groups oxidative polymerization anilinium ammonium persulfate under reaction conditions, providing no bulk polyaniline. Scanning electron...
Metal-organic frameworks (MOFs) represent a class of porous materials whose properties can be altered by doping with redox-active molecules. Despite advanced such as enhanced electrical conduction that doped MOFs exhibit, understanding physical mechanisms remains challenging because their heterogeneous nature hindering experimental observations host-guest interactions. Here, we show study charge transfer between Mn-MOF-74 and electron acceptors, 7,7,8,8-tetracyanoquinodimethane (TCNQ) XeF2,...
Polyaniline (PANI) and 2,5-dianilino-p-benzoquinone both are formed by oxidation of aniline in an acidic aqueous environment. The aim this study is to understand the impact addition p-benzoquinone on structure PANI prepared hydrochloride with ammonium peroxydisulfate elucidate formation low-molecular-weight byproducts. An increasing yield size-exclusion chromatography, Fourier-transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy, nuclear magnetic resonance analyses...
Abstract The complexation of terpyridine ( tpy ) and its 4′‐ethynyl (E) 4′‐(2‐thienyl) (T) derivatives, as promising chelate end groups for oligomeric components conjugated metallosupramolecular polymers, with Zn 2+ Fe ions ion couplers was investigated in acetonitrile using NMR UV/Vis spectroscopy. binding these ligands shows two distinct steps comparable constants the range 10 6 dm 3 mol –1 , whereas their a strong tendency to form [FeL 2 ] species, which almost do not dissociate...
Stepwise addition of H2O2 in small portions into the polymerization mixture reduces number defects polyaniline (PANI) prepared with Fe3+/H2O2 system, although it does not eliminate them completely. PANIs slightly self-doped phenolic groups are thus obtained, which show conductivity from 2.65 to 0.38 S cm−1 as total H2O2/aniline mole ratio is increased 0.125 1.25. The shows a good correlation AB/A900 UV−visible absorbance PANI emeraldine salt form (PANI ES), much better than AB/AQ...
Abstract Poly( p ‐phenylenediamine) ( PPDA ) and also its ladder‐like analogue were prepared by oxidation of ‐phenylenediamine with ammonium peroxydisulfate in an aqueous solution 0.4 mol L −1 hydrochloric acid converted to bases. These used as reductants silver nitrate nanoparticles 1 methanesulfonic or water at various mole ratios units from 0 1.8. The original conductivity the , 10 −12 S cm increased order 100 for –silver composites containing 27–40 wt% (i.e. 4.5–6.6 vol%) silver. Fourier...
ABSTRACT The conducting form of polyaniline (PANI) is formed by doping non‐conducting PANI base usually protonic acids. An alternative way doping, consisting in an interaction via hydrogen bonding, has been previously proven for H‐phosphonates. In this study, films are exposed to various H‐phosphonates, changes the structure analyzed ultraviolet–visible, infrared, and Raman spectroscopies spectroscopic data compared with quantum chemical calculations. According our results, H‐phosphonates...
Abstract New stable polyacetylenes whose quantum yield of fluorescence is increased up to 62% because the presence pendant 4‐(piperidine‐1‐yl)‐1,8‐naphtalimide groups are described. The polymers prepared by two‐step modification copolymers 1‐(4‐ tert ‐butylphenyl)‐6‐chlorohex‐1‐yne and 1‐phenylhex‐1‐yne consisting exchange chlorine atoms at side for azide subsequent Huisgen click reaction with ethynyl N ‐(prop‐1‐yne‐3‐yl)‐4‐(piperidine‐1‐yl)‐1,8‐naphthalimide. Modification evidenced 1 H NMR,...
The blue thin polyaniline base film changes its color to green after immersion of the into dibutyl phosphonate. converts a greenish-blue heating 200 °C in air, which is characteristic for protonated conducting form polyaniline. This contrast "standard" hydrochloride, transformed cross-linked under such conditions. To explain this unexpected observation, interaction with phosphonate at ambient conditions and was studied using UV-visible, FTIR Raman spectroscopies. On basis these studies, we...