A5031045890- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Synthesis and Properties of Aromatic Compounds
- Luminescence and Fluorescent Materials
- Supramolecular Chemistry and Complexes
- Porphyrin and Phthalocyanine Chemistry
- Crystallography and molecular interactions
- Polysaccharides and Plant Cell Walls
- Axial and Atropisomeric Chirality Synthesis
- Biofuel production and bioconversion
- Carbon Nanotubes in Composites
- Bee Products Chemical Analysis
- Lignin and Wood Chemistry
- Phytochemicals and Antioxidant Activities
- Boron and Carbon Nanomaterials Research
- Insect and Pesticide Research
University of Wrocław
2014-2022
A cycloparaphenylene-based molecular lemniscate (CPPL) was obtained in a short synthesis involving masked p-phenylene equivalents. The strained figure-eight geometry of CPPL is sustained by the incorporated 9,9′-bicarbazole subunit, which also acts as stereogenic element. shape distorted [16]cycloparaphenylene nanohoop embedded accurately approximated with Booth lemniscate. structure CPPL, investigated using NMR and Raman spectroscopic methods, revealed strain-dependent features, consistent...
Nonclassical nanotube end-caps have been constructed from strain-free heterocyclic precursors using a one-step synthetic procedure, involving multiple nickel-mediated Ullmann couplings. These systems consist of tubular macrocyclic sections that are tightly capped on one side with bridging benzene ring, forming deep, chemically accessible cavities. The characterized by exceptionally high internal strain energies reaching 144 kcal/mol. optical absorption and emission properties these molecules...
Abstract Direct alkylation of 9,9′,9′′‐triethyl[2.2.2](2,7)carbazolophane with dimethoxymethane or paraformaldehyde affords a belt‐like heteroaromatic structure, which forms as kinetic product in acid‐catalyzed condensations. In competing, thermodynamically favored process, polymeric structures are formed by largely regioselective condensation stereochemically rigid “semi‐belts”. The relationship between these reactivity routes is rationalized terms strain release and differential...
Peripheral substitution of a π-extended porphyrin with bulky groups produces curved chromophore four helical stereogenic units. The curvature and stereochemistry such porphyrins can be controlled by varying the substituents, coordinated metal ions, apical ligands. In particular, when achiral saddle-shaped free bases are treated large i.e., Cd
An application of solid 13C nuclear magnetic resonance (NMR) spectroscopy for the determination macronutrients, total polyphenols content, antioxidant activity, N C S elements, and pH in commercially available bee pollens is reported herein. Solid-state NMR spectra were recorded homogenized pollen granules without chemical treatment or dissolution samples. By combining spectral data with results reference analyses, partial least squares models constructed validated separately each studied...
Abstract Peripheral substitution of a π‐extended porphyrin with bulky groups produces curved chromophore four helical stereogenic units. The curvature and stereochemistry such porphyrins can be controlled by varying the substituents, coordinated metal ions, apical ligands. In particular, when achiral saddle‐shaped free bases are treated large i.e., Cd II or Hg , resulting complexes convert to chiral propeller‐like configurations. X‐ray diffraction analyses show that coordination water...