Jan Richtár

ORCID: 0000-0003-1422-9917
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Research Areas
  • Crystallization and Solubility Studies
  • Conducting polymers and applications
  • X-ray Diffraction in Crystallography
  • Photochemistry and Electron Transfer Studies
  • Analytical Chemistry and Chromatography
  • Luminescence and Fluorescent Materials
  • Organic Electronics and Photovoltaics
  • Photochromic and Fluorescence Chemistry
  • Porphyrin and Phthalocyanine Chemistry
  • Antibiotics Pharmacokinetics and Efficacy
  • Crystallography and molecular interactions
  • Phenothiazines and Benzothiazines Synthesis and Activities
  • Analytical Methods in Pharmaceuticals
  • Bioactive Compounds and Antitumor Agents
  • biodegradable polymer synthesis and properties
  • Electrochemical sensors and biosensors
  • Global Peace and Security Dynamics
  • Electrochemical Analysis and Applications
  • Supramolecular Self-Assembly in Materials
  • Advanced Sensor and Energy Harvesting Materials
  • Fullerene Chemistry and Applications
  • Orthopaedic implants and arthroplasty
  • Synthesis and Properties of Aromatic Compounds

Brno University of Technology
2018-2023

Flavins are known to be extremely versatile, thus enabling routes innumerable modifications in order obtain desired properties. Thus, the present paper, group of bio-inspired conjugated materials based on alloxazine core is synthetized using two efficient novel synthetic approaches providing relatively high reaction yields. The comprehensive characterization materials, evaluate properties and application potential, has shown that modification initial with aromatic substituents allows fine...

10.3390/molecules23092271 article EN cc-by Molecules 2018-09-05

A series of novel soluble nature-inspired flavin derivatives substituted with short butyl and bulky ethyl-adamantyl alkyl groups was prepared via simple straightforward synthetic approach moderate to good yields. The comprehensive characterization the materials, assess their application potential, has demonstrated that modification conjugated core enables delicate tuning absorption emission properties, optical bandgap, frontier molecular orbital energies, melting points, thermal stability....

10.3390/molecules26010027 article EN cc-by Molecules 2020-12-23

Abstract Natural or nature‐inspired molecules play a key role in many modern applications as they may imitate nature the efficiency with which it works different spectrum of biological processes. One biggest challenges today is to make efficient use renewable energy sources, that are lagging behind conventional technologies on global scale. form this solar can be garnered by organic photovoltaics (OPV). The golden wave OPV observed advent non‐fullerene acceptors (NFAs). Chemical...

10.1002/ijch.202100061 article EN Israel Journal of Chemistry 2021-10-01

Abstract The synthesis, experimental and theoretical study of the novel air‐stable four adamantane‐bearing dyes based on trans‐ epindolidione ( EPI ) quinacridone QA cores are presented. Compared to parent , methyl‐/ethyladamantyl substitution ensures that their structural stability in crystals is preserved due self‐organizing properties adamantyl groups. investigated materials solution‐processable common organic solvents possess excellent thermal stability. very good solubility was achieved...

10.1002/cptc.202100127 article EN ChemPhotoChem 2021-09-14

Abstract Hydrogen peroxide (H 2 O ) is identified as a promising reagent for fuel cells, reducing the dependency on carbon‐based fuels. In this work, electrochemically synthesized polymers are employed to improve efficiency of oxygen (O reduction reaction, thus producing H in an environmentally friendly way. Two aminoanthraquinones, well riboflavin (vitamin B2), successfully immobilized via oxidative electropolymerization onto both glassy carbon and paper. Of investigated compounds,...

10.1002/adsu.202300352 article EN cc-by Advanced Sustainable Systems 2023-12-27

The absorption and emission spectra were investigated for lumazine alloxazine, their cyanated fluorinated derivatives, respectively. spectroscopic properties modulated by varying water concentration in dimethyl sulfoxide (DMSO). Some intriguing results found the samples containing 65 % of water, 35 DMSO. In this case, a notable decrease both intensities was registered, even larger than quenching observed other cases. Experiments indicated that only isoalloxazine isolumazine forms are present...

10.2139/ssrn.4373116 article EN 2023-01-01

Abstract A systematic study of (7,8-dimethylated) alloxazine, isoalloxazine, and their derivatives with substituted N(1) N(10) positions was conducted using the density functional theory. The main aim this work direct investigation substituent effect on molecular structure. Furthermore, HOMED aromaticity indices were calculated to describe scope geometry changes. Frontier orbitals reference isoalloxazine lumichrome discussed by means changes in shape energy levels. Photophysical properties...

10.2478/acs-2020-0017 article EN Acta Chimica Slovaca 2020-10-01
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