Patryk Bielecki

Volume: 18

Page Numbers: 309-312

Publication Date: 2016

Publication Name: Osadnictwo wielokulturowe w Napachaniu, stan. 59, gm. Rokietnica, pow. poznański, woj. wielkopolskie Wyniki badań archeologicznych. In: BIBLIOTHECA FONTES ARCHAEOLOGICI POSNANIENSES

Research Interests:
Archaeology, Prehistoric Archaeology, Bronze Age Europe (Archaeology), X-Ray Fluorescence (XRF) Spectroscopy, Late Bronze Age archaeology, and 6 moreArchaeometallurgy, Bronze Age (Archaeology), Urnfield Culture, Non Destructive Testing, Lusatian Culture, and Copper Alloys

New macrocyclic stationary chemically bonded phases were synthesized and tested in gas chromatography conditions. The complexes of 1,4,8,11-tetraazacyclotetradecane with Cu(II) and Co(II) were bonded to the silica support through the... more

New macrocyclic stationary chemically bonded phases were synthesized and tested in gas chromatography conditions. The complexes of 1,4,8,11-tetraazacyclotetradecane with Cu(II) and Co(II) were bonded to the silica support through the (3-chloropropyl)triethoxysilane reactant. The packings obtained were analyzed by diffuse-reflectance ultraviolet-visible spectroscopy (DRUV-Vis), differential thermal gravimetry (DTG), porosimetry, and elementary analysis. Preliminary study of the novel silica gas chromatography (GC) stationary phases containing cyclam complexes was carried out using packed 1/8in. i.d. columns. The study was conducted on: cyclic, linear and branched olefins, aromatic hydrocarbons and ethers. Characterization of interactions between the compounds mentioned and new stationary phases was based upon analysis of Kováts retention indices (I), difference between retention indices for two phases (DeltaI), and molecular retention indices (DeltaM(e)). Results have shown that the new stationary phases interact sufficiently strongly with molecules of high electron density and can be applied in capillary gas chromatography for the analysis of light hydrocarbons.

Publication Date: 2010

Publication Name: Journal of Chromatography A

Research Interests:
Engineering, Technology, Macrocycle, Copper, Temperature, and 14 moreGas Chromatography, Cobalt, Electron Density, Thermogravimetry, CHEMICAL SCIENCES, HYDROCARBONS, Thermal Analysis, Diffuse reflectance, Ether, Molecular weight, Retention Time, Ethers, Heterocyclic compounds, and Diffuse Reflection

In this paper, Kováts retention indices determined on stationary phases with chemically bonded copper complexes were correlated with molecular structural parameters for aromatic compounds. Principal component regression (PCR) was applied... more

In this paper, Kováts retention indices determined on stationary phases with chemically bonded copper complexes were correlated with molecular structural parameters for aromatic compounds. Principal component regression (PCR) was applied to extract principal components from the set of 13 descriptors compiled in 5 theoretical models. Extracted components were used to model theoretical retention indices. Significant correlations were found among the retention indices of these compounds and, among others: molecular surface and molecule area, boiling point, HOMO and LUMO energies, dipole moment, dielectric energy, and double bond count. These correlations provide insights into the mechanism of chromatographic retention at the molecular level for the packings and the compounds under study.

Publication Date: 2010

Publication Name: Journal of Chromatography A

Research Interests:
Engineering, Technology, Chromatography, Principal Component Analysis, Quantum Theory, and 6 moreLinear models, Copper, Gas Chromatography, CHEMICAL SCIENCES, Polycyclic aromatic hydrocarbons (PAHs), and Molecular Structure

The paper gives a short review of the most important research results published recently in the field of the applications of supramolecular nanocarriers in modern pharmaceutical and analytical chemistry. The main attention has been paid... more

The paper gives a short review of the most important research results published recently in the field of the applications of supramolecular nanocarriers in modern pharmaceutical and analytical chemistry. The main attention has been paid to the fast developing technology of chemical sensors, ion-selective electrodes and separation methods, in particular to newly designed packing in high-performance liquid chromatography employing supramolecularly aided and membrane mimicking processes.