A5068758971- Fullerene Chemistry and Applications
- Synthesis and Catalytic Reactions
- Porphyrin and Phthalocyanine Chemistry
- Fluorine in Organic Chemistry
- Cyclopropane Reaction Mechanisms
- Organic Chemistry Cycloaddition Reactions
- Catalytic C–H Functionalization Methods
- Conducting polymers and applications
- Advanced Photocatalysis Techniques
- Carbon Nanotubes in Composites
- Chemical Reactions and Mechanisms
- Organic Electronics and Photovoltaics
- Gold and Silver Nanoparticles Synthesis and Applications
- Synthesis and Properties of Aromatic Compounds
- Synthesis of β-Lactam Compounds
- Nonlinear Optical Materials Studies
- TiO2 Photocatalysis and Solar Cells
- Advancements in Battery Materials
- Supercapacitor Materials and Fabrication
- Advanced battery technologies research
- Phenothiazines and Benzothiazines Synthesis and Activities
- Advanced Nanomaterials in Catalysis
- Graphene research and applications
- Synthesis and Reactions of Organic Compounds
- Electrochemical sensors and biosensors
St Petersburg University
2014-2024
Friedrich-Alexander-Universität Erlangen-Nürnberg
2014
Quinone-polythiophene composites show much promise as organic electrode materials for energy storage applications due to combination of conducting properties polythiophene matrix with inherently high specific capacity quinones. To...
Abstract The nickel salen‐type redox polymers represent an interesting class of organometallic frequently used in hybrid supercapacitor electrodes as thin films and carbon material composites. However, the suitability these compounds for application electrode materials rechargeable batteries has not yet been tested. In this study, processes monocomponent based on a series are investigated 1 m LiPF 6 1:1 ethylene carbonate (EC)/diethyl (DEC) electrolyte Li‐ion battery. oxidation potentials...
Abstract The quantum‐chemical calculations of the thermal ring opening 1‐methyl‐2,3‐diphenyl‐ and 1,2,3‐triphenylaziridine with formation corresponding azomethine ylides S‐, U‐, W‐type as well their cycloaddition to dimethyl acetylenedicarboxylate (DMAD) 2,3‐dicyanobut‐2‐enedioate, were performed at DFT B3LYP/6‐31G(d) level theory PCM solvation model. are in complete accordance experimental results explain switch from concerted non‐concerted pathway depending on substituents dipolarophile...
Cycloaddition of dibenzoxazepinium ylides to acetylene carboxylates leads cis-3-aryl-3,13b-dihydrodibenzo[b,f]pyrrolo[1,2-d][1,4]oxazepinecarboxylates, which smoothly dehydrogenate the corresponding pyrrole derivatives. The o-bromophenyl-substituted pyrrole, in contrast pyrroline analogue, demonstrates atropoisomerism. Stereoselective cycloaddition fullerene C60 gives rise fulleropyrrolidines with cis-configuration. Restricted Ph group rotation is found phenyl derivative. Only one two...
An effective approach to azepino-fused heterocycles is described. trans-1-Aryl-7,11b-dihydro-1H-azirino[1,2-a]dibenzo[c,f]azepines were synthesised via a domino sequence: isomerization of gem-dichloroaziridine–intramolecular Friedel–Crafts acylation the tethered benzene ring catalysed by SnCl4 and subsequent hydride induced intramolecular cyclization. Cycloaddition dibenzazepinium ylides, generated heating these aziridines, activated CC, CC dipolarophiles fullerene C60, leads derivatives...
The synthesis of alkoxycarbonyl-substituted bisaziridines with the two aziridine units connected by conjugated p-phenylene, partly 1,1'-biphenyl-4,4'-diyl, and nonconjugated 4,4'-methylenediphenyl linkers was developed. reaction azomethine ylides derived from fullerene C(60) optimized used for stereoselective preparation both monoadducts (C(60)-linker-aziridine dicarboxylate), dumbbell bisadducts (C(60)-linker-C(60)). reasons observed selectivity ylide formation cycloaddition were...
Abstract Electroactive and conductive polymers based on transition metal complexes with salen‐type ligands are of interest as potential materials for energy storage solar conversion. The easily tunable structure monomers allows to modify polymer properties by changing either the central atom or ligand substituents. Herein we report photoelectrocatalytic activity [M II (L)] n complexes, where M is Ni, Cu Pd, L a tetradentate N,N,O,O ligand, in reduction molecular oxygen hydrogen peroxide...
A new approach to porphyrinofullerene donor–acceptor dyads, based on consecutive 1,3-dipolar cycloaddition of azomethine ylides, generated from bis-aziridinedicarboxylate, C60 and porphyrin with a maleimidophenyl substituent, was developed. synthesis the axially symmetric porphyrin–fullerene–C60 ensemble 5 novel rigid pyrrolo[3,4-c]pyrrolic linker realized. Theoretical, electrochemical, spectroscopic studies compound showed that it is capable forming charge-separated state.
Abstract A series of covalently linked axially symmetric porphyrin–fullerene dyads with a rigid pyrrolo[3,4‐ c ]pyrrolic linker enabling fixed and orthogonal arrangement the chromophores has been synthesized studied by means transient absorption spectroscopy cyclic voltammetry. The lifetime charge‐separated state found to depend on substituents porphyrin core, reaching up 4 μs for species meso ‐( p ‐MeOC 6 H ) substituents. ground excited electronic states model compounds have calculated at...
We have synthesized a new water-stable [Ni(salen)]-type electrode material, which was found to be stacked polymer due the presence of substituents, preventing oxidative coupling phenyl rings.
Abstract Specially designed porphyrin–fullerene dyads have been synthesized to verify literature predictions based on quantum chemistry calculations that certain are able self‐arrange into specific structures providing channels for charge transport in a bulk mass of organic compound. According AFM and SEM data, the newly compounds were indeed prone some kind self‐arrangement, although lesser degree than was expected. A dispersion corrected DFT study molecular non‐covalent interactions...
Porphyrin-fullerene dyads were intensively studied as molecular donor-acceptor systems providing efficient photoinduced charge separation (CS). A practical advantage of the is possibility to tune its CS process by porphyrin periphery modification, which allows one optimize dyad for particular applications. However, this tuning typically composed a series trial stages involving development complex synthetic schemes. To address issue, we synthesized with properties switching between electron...
Building blocks for the synthesis of monofluorinated organic compounds are reviewed. The synthetic potential polyhalomethanes, sulfur- and phosphorus-containing building blocks, difluoroethene, polyhaloethanes, fluoroacetic acid derivatives, other described. Pericyclic reactions involving fluorinated application methodology to pharmaceuticals analogs natural considered. review with 317 references covers mainly literature from 1996 through 2007.
The diastereospecific and highly site-selective cycloaddition of N-arylazomethine ylides generated in situ from diethyl N-arylaziridine-2,3-dicarboxylates to C70 fullerene is reported. reaction provides fulleropyrrolidines up hundreds on a milligram scale as α- β-adducts 4:1 ratio with controlled stereochemical outcome: cis-aziridines give exclusively trans-adducts, trans-aziridines only cis-adducts. 1H 13C{1H} NMR spectra for different isomeric adducts were recorded analyzed identify some...
In this work, the influence of substituents in structure diimine bridge nickel polymer complexes with salen-type ligands on rate loss their electroactivity dried and water-containing electrolyte solutions was studied. It is shown that presence four methyl groups, which leaves complex plane, can significantly reduce during cycling a (residual capacity 37% relative to initial one after 50 cycles) compared unsubstituted poly[Ni(salen)] 15%), containing only group groups alpha positions...