A5044556962- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Molecular Sensors and Ion Detection
- Analytical Chemistry and Sensors
- Supramolecular Chemistry and Complexes
- Dendrimers and Hyperbranched Polymers
- Luminescence and Fluorescent Materials
- Electrochemical Analysis and Applications
- Chemical Synthesis and Reactions
- Dyeing and Modifying Textile Fibers
- Fullerene Chemistry and Applications
- Metal-Organic Frameworks: Synthesis and Applications
- Organic Electronics and Photovoltaics
- Mass Spectrometry Techniques and Applications
- Chemical Synthesis and Analysis
- Photochromic and Fluorescence Chemistry
- Bamboo properties and applications
- Organometallic Complex Synthesis and Catalysis
- Sulfur-Based Synthesis Techniques
- Photochemistry and Electron Transfer Studies
- Radical Photochemical Reactions
- Catalytic Cross-Coupling Reactions
- Click Chemistry and Applications
- Organic Light-Emitting Diodes Research
Czech Academy of Sciences, J. Heyrovský Institute of Physical Chemistry
2020-2024
University of Chemistry and Technology, Prague
2020-2024
Czech Academy of Sciences, Institute of Chemical Process Fundamentals
2020-2024
Masaryk University
2018
Driving forces of anion binding in water contrast to nonpolar environments are high interest because their relevance biology and medicine. Here we report a neutral bambusuril macrocycle (1), soluble both solvents due decoration with 12 polyethylene glycol-based substituents. The new has the highest affinity for I– pure ever reported synthetic relying on hydrogen bonding interactions rather than metal coordination or Coulombic forces. Isothermal titration calorimetry (ITC) experiments nine...
Abstract A sulphonamidic moiety was utilized as an electron‐withdrawing group for enhancement of anion complexation features urea‐based receptors. series receptors varying in acidity and urea N H groups synthesized thoroughly tested. The individual properties reflect deprotonation/complexation equilibrium a given molecule function the substitution. containing electron‐donating conjugation to showed higher association constants towards 2 PO 4 − carboxylate anions, while those inclined...
Coupling of electron-deficient urea units with aliphatic chains gives rise to amphiphilic compounds that bind phosphate and benzoate anions in the hydrogen bonding competitive solvent (DMSO) KAss = 6 580 M–1 4 100 M–1, respectively. The anchoring these receptor moieties dendritic support does not result a loss anion binding enables new applications. Due formation microenvironment dendrimer, high selectivity prepared compound toward is maintained even presence aqueous media during extraction...
A new method for selective cleavage of sulfonimides into sulfonamides in high yields using a simple electrochemical approach is shown. As revealed by the study, aromatic can be selectively cleaved electrolysis starting compound at given potential (only −0.9 V vs SCE nosyl group). The chemoselectivity was confirmed preparative electrolysis, and results were supported with DFT calculations set substances bearing different sulfonimide functions. Moreover, various experimental setups together...
A Sonogashira coupling of meta-iodocalix[4]arene with various terminal acetylenes confirmed that the meta position calixarene is well addressable, and both thermal microwave protocols led to good yields alkynylcalixarenes. Alkynes thus obtained were subjected ferric chloride diphenyl diselenide-promoted electrophilic closure. It turns out calix[4]arenes give completely different bridging products than those described for non-macrocyclic starting compounds. This can be demonstrated not only...
The bisureas demonstrated interesting differences in complexation: the meta , and para isomers preferred 2 : 1 complexes, while analogous isomer formed a complex.
The repetition of urea-based binding units within the receptor structure does not only lead to monomer properties multiplication. As confirmed by spectroscopic studies, UV-Vis and 1H-NMR in classical or competitive titration mode, attachment a carrier allocates active moieties mutual positions predetermining function whole molecule. Bivalent receptors form self-aggregates. Dendritic with low dihydrogen phosphate loadings offer cooperative complexation mode associated positive dendritic...
Abstract Homovanillate (HVA) and vanilmandelate (VMA) are recognized markers of diseases, including neuroblastoma. However, their detection in urine represents a challenging task due to the complexity matrix. Here, design, synthesis thorough investigation polymerizable urea‐based receptors interacting with HVA VMA reported. The selection receptor best anion recognition properties for electrode coating is based on 1 H‐NMR UV‐Vis complexation studies. sensor prepared by electropolymerization...
A novel approach to calix[5-7]arenes possessing mixed (S and CH2) bridges within the skeleton is based on reaction of thiacalix[4]arene monosulfoxide with BuLi leading a linear phenolic tetramer in essentially quantitative yield. This key intermediate then cyclized suitable building blocks give macrocyclic calixarene analogues. Compared traditional stepwise construction similar systems, this procedure thiacalixarene cleavage represents scalable, robust, straightforward synthesis enables...
Nowadays, there are efforts to apply alternative sources of renewable energy. One these is solar Solar energy represents a free source that sustainable and totally inexhaustible. The standard efficiency cells now below 30 %. Singlet fission has attracted rising attention because it promises increase the maximum theoretical single-junction cells. While after absorption one photon generates electron, singlet photophysical process, whereby exciton generated by irradiation splits into two...
Anions play an important role in biological systems. At the same time, many of them are major environmental pollutants and substances endangering living organisms [1]. For these purposes anion recognition, elimination sensing would find application branches including medicine or chemistry. Suitable examples phosphates, which could cause eutrophication water they also known for their limited removal from body fluids, lead to serious health problems. Therefore, aim our research group is design...