Search results for: Marcin Oszajca

Items from 1 to 20 out of 22 results

article

Cover Image, Volume 140, Issue 7

Monika Flejszar, Paweł Chmielarz, Marcin Oszajca

Journal of Applied Polymer Science > 140 > 7 > n/a - n/a

The cover designed by the Chmielarz Research Group refers to wine‐based miniemulsion used as a polymerization medium for the synthesis of non water‐miscible polymethacrylates for the first time. Various types of wines were presented as antioxidant‐rich solvents, which enabled the controlled synthesis of hydrophobic (co)polymers. Dry wine was characterized as the best candidate for double‐controlled...

article

Red is the new green: Dry wine‐based miniemulsion as eco‐friendly reaction medium for sustainable atom transfer radical polymerization

Monika Flejszar, Paweł Chmielarz, Marcin Oszajca

Journal of Applied Polymer Science > 140 > 7 > n/a - n/a

Wine‐based miniemulsion was used as polymerization medium for the synthesis of non water‐miscible polymethacrylates for the first time. The solution, inspired by green chemistry principles, is an interesting alternative to the use organic solvent application in polymer synthesis. The paper presents an unusual but cost‐effective solution, which, due to the presence of reducing agents present in wine,...

article

Non‐invasive surface analysis of ancient bronze arrowheads with scanning electron microscopy and X‐ray powder diffractometry

Michał Duda, Marcin Oszajca, Wiesław Łasocha

Surface and Interface Analysis > 54 > 8 > 873 - 880

In this research, surfaces of eight ancient metal arrowheads were investigated regarding chemical composition, homogeneity, and products of corrosion. To perform that, two nondestructive techniques were applied: Scanning electron microscopy coupled with energy dispersive spectroscopy (SEM‐EDS), and X‐ray powder diffractometry (XRPD). Importantly, both methods did not require sampling, cutting, nor...

article

Spectroscopic Evidence for Ligand Substitution Reactions at the Solid–Liquid Interface of a Sub‐micrometer Gold(I) Carbene Complex

Daniel Langford, Mirjana Đurović, Marcin Oszajca, Joanna Kuncewicz, more

Angewandte Chemie > 130 > 3 > 671 - 675

Colloidal coordination compounds in the sub‐micrometer range were synthesized from a chloro gold(I) carbene complex via the anti‐solvent procedure and stabilized by a surfactant shell of Tween 20. This compound was successfully applied as model system to monitor heterogeneous multiphase ligand substitution reactions at the solid–liquid interface.

article

Spectroscopic Evidence for Ligand Substitution Reactions at the Solid–Liquid Interface of a Sub‐micrometer Gold(I) Carbene Complex

Daniel Langford, Mirjana Đurović, Marcin Oszajca, Joanna Kuncewicz, more

Angewandte Chemie International Edition > 57 > 3 > 663 - 667

article

Influence of preparation method on dispersion of cobalt spinel over alumina extrudates and the catalyst deN2O activity

Gabriela Grzybek, Sylwia Wójcik, Klaudia Ciura, Joanna Gryboś, more

Applied Catalysis B: Environmental > 2017 > 210 > C > 34-44

A series of supported catalysts of the Co₃O₄ spinel active phase dispersed over alumina extrudates (9×25mm) was prepared by several methods (incipient wetness impregnation with Co(NO₃)₂ and CoCl₂, with glycerol-assisted impregnation with Co(NO₃)₂, combustion synthesis, and two variants of spray deposition with Co(NO₃)₂ on pristine and ammonia soaked extrudates). The catalysts were characterized by...

article

Ladder-chain zinc coordination polymers based on adipic acid dihydrazide precursor: Synthesis and structural transformations

Piotr Zabierowski, Marcin Oszajca, Maciej Hodorowicz, Dariusz Matoga

Polyhedron > 2017 > 121 > C > 25-32

Two ladder-chain zinc coordination polymers were synthesized in aqueous or N,N-dimethylformamide (DMF) solution by use of adipic acid dihydrazide (adih) precursor: {[Zn₂(H₂aph)(pim)₂]·4H₂O}_n (pim=pimelate, H₂aph=adipic bis(2-picolinylidene)hydrazide) and {[Zn₂(adih)₃][NO₃]₄·2DMF}_n. X-ray crystal structures of the polymers were determined and the lattice solvent removal was investigated. The structural,...

article

Molybdenum Complexes as Catalysts for the Oxidation of Cycloalkanes with Molecular Oxygen

Anna Szymańska, Wojciech Nitek, Marcin Oszajca, Wiesław Łasocha, more

Catalysis Letters > 2016 > 146 > 5 > 998-1010

A group of new polymolybdates was synthesized and tested in the catalytic oxidation of cycloalkanes. Investigated compounds exhibit broad structural diversity including polymolybdates with isolated anionic clusters (0-dim), polymeric anions (1-dim), Mo–O layers (2-dim) as well as hexagonal and orthorhombic molybdenum oxides (3-dim). All studied molybdenum complexes were found to be active in the reaction...

article

Mesoporous carbon-containing voltammetric biosensor for determination of tyramine in food products

Jolanta Kochana, Karolina Wapiennik, Paweł Knihnicki, Aleksandra Pollap, more

Analytical and Bioanalytical Chemistry > 2016 > 408 > 19 > 5199-5210

A voltammetric biosensor based on tyrosinase (TYR) was developed for determination of tyramine. Carbon material (multi-walled carbon nanotubes or mesoporous carbon CMK-3-type), polycationic polymer—i.e., poly(diallyldimethylammonium chloride) (PDDA), and Nafion were incorporated into titania dioxide sol (TiO₂) to create an immobilization matrix. The features of the formed matrix were studied by scanning...

article

Crystal structures of 1,8‐bis(dimethylamino)naphthalene (DMAN) and dicarboxylic acids complexes determined from single‐crystal and powder diffraction data

Marcin Oszajca, Wojciech Nitek, Alicja Rafalska‐Łasocha, Wiesław Łasocha

Crystal Research and Technology > 50 > 9-10 > 781 - 790

New complexes of DMAN proton sponge with 3 dicarboxylic acids (dca): glutaric {1}, suberic {2} and dodecanedioic acid {3} were obtained. The structures of the complexes {1,2} were solved on the basis of laboratory powder data, while the structure of {3} was solved using single crystal methods. The additional goal of the study was to test some new approaches to organic crystal structure solution from...

article

Fine refinement of solid state structure of racemic form of phospho-tyrosine employing NMR Crystallography approach

Piotr Paluch, Tomasz Pawlak, Marcin Oszajca, Wieslaw Lasocha, more

Solid State Nuclear Magnetic Resonance > 2015 > 65 > C > 2-11

We present step by step facets important in NMR Crystallography strategy employing O-phospho-dl-tyrosine as model sample. The significance of three major techniques being components of this approach: solid state NMR (SS NMR), X-ray diffraction of powdered sample (PXRD) and theoretical calculations (Gauge Invariant Projector Augmented Wave; GIPAW) is discussed. Each experimental technique provides...

article

Bis(4‐methylanilinium) and bis(4‐iodoanilinium) pentamolybdates from laboratory X‐ray powder data and total energy minimization

Marcin Oszajca, Ľubomír Smrčok, Wiesław Łasocha

Acta Crystallographica Section C > 69 > 11 > 1367 - 1372

The crystal structures of poly[bis(4‐methylanilinium) [tetra‐μ₃‐oxido‐hexa‐μ₂‐oxido‐hexaoxidopentamolybdenum(VI)]], {(C₇H₁₀N)₂[Mo₅O₁₆]}_n, (I), and poly[bis(4‐iodoanilinium) [tetra‐μ₃‐oxido‐hexa‐μ₂‐oxido‐hexaoxidopentamolybdenum(VI)]], {(C₆H₇IN)₂[Mo₅O₁₆]}_n, (II), were determined from laboratory X‐ray powder diffraction data using the direct‐space parallel‐tempering approach and refined by total energy...

article

Synthesis and structure determination of tetrakis(4-iodoanilinum) β-octamolybdate dihydrate

Marcin Oszajca, Ľubomír Smrčok, Helena Pálková, Wiesław Łasocha

Journal of Molecular Structure > 2012 > 1021 > Complete > 70-75

Tetrakis(4-iodoanilinum) β-octamolybdate dihydrate (I) was synthesized and its structure was solved using powder diffraction methods and the atoms positions optimized by the solid state DFT calculations. The structure is triclinic (P-1) with cell parameters: a=9.7099(4)Å, b=9.8169(3)Å, c=14.9842(6)Å, α=97.349(3)°, β=102.989(3)°, γ=113.335(3)°, V=1239.79Å ³ . The anion type was determined based...

article

Humidity-Driven Reversible Transformation and Guest Inclusion in a Two-Dimensional Coordination Framework Tailored by Organic Polyamine Cation

Robert Podgajny, Szymon Choraży, Wojciech Nitek, Andrzej Budziak, more

Crystal Growth & Design > 2011 > 11 > 9 > 3866 - 3876

article

Rücktitelbild: Double Switching of a Magnetic Coordination Framework through Intraskeletal Molecular Rearrangement (Angew. Chem. 17/2011)

Dawid Pinkowicz, Robert Podgajny, Bartłomiej Gaweł, Wojciech Nitek, more

Angewandte Chemie > 123 > 17 > 3902 - 3902

Das reversible Entfernen von Gastmolekülen in magnetischen Mn₂Nb‐Koordinationspolymeren, über das D. Pinkowicz, B. Sieklucka et al. in der Zuschrift auf S. 4059 ff. berichten, bewirkt eine zweistufige Umlagerung des Gerüsts unter topotaktischer Bildung einer weiteren molekularen Brücke und Verschiebung des eingebauten organischen Liganden. Im Zuge dieser Strukturänderungen lässt sich die Curie‐Temperatur...

article

Double Switching of a Magnetic Coordination Framework through Intraskeletal Molecular Rearrangement

Dawid Pinkowicz, Robert Podgajny, Bartłomiej Gaweł, Wojciech Nitek, more

Angewandte Chemie > 123 > 17 > 4059 - 4063

Auf den Stufen zum Olymp: Ein Mn₂Nb‐Koordinationsnetzwerk zeigt ein ausgeprägtes Schalten der Curie‐Temperatur mit zwei wohldefinierten Stufen, wobei in der wasserfreien Form 100 K erreicht werden. Das durch das Entfernen/Aufnehmen von Gastmolekülen gesteuerte Schalten geht mit einer Gerüstumlagerung durch reversible Bildung/Spaltung von molekularen Brücken und Translokation eines organischen Liganden...

article

Double Switching of a Magnetic Coordination Framework through Intraskeletal Molecular Rearrangement

Dawid Pinkowicz, Robert Podgajny, Bartłomiej Gaweł, Wojciech Nitek, more

Angewandte Chemie International Edition > 50 > 17 > 3973 - 3977

Stairway to heaven: An Mn₂Nb coordination framework shows huge switching of the magnetic ordering temperature in two well‐defined steps, finally reaching 100 K in its anhydrous form. The switching, controlled by removal/uptake of guest molecules, is related to an intraskeletal molecular rearrangement involving reversible formation/breaking of molecular bridges and translocation of an organic ligand...

article

Back Cover: Double Switching of a Magnetic Coordination Framework through Intraskeletal Molecular Rearrangement (Angew. Chem. Int. Ed. 17/2011)

Dawid Pinkowicz, Robert Podgajny, Bartłomiej Gaweł, Wojciech Nitek, more

Angewandte Chemie International Edition > 50 > 17 > 3818 - 3818

The reversible removal of guest molecules in Mn₂Nb magnetic coordination framework materials, as described by D. Pinkowicz, B. Sieklucka et al. in their Communication on page 3973 ff., causes a spectacular two‐step molecular rearrangement of their skeleton involving the topotactic formation of an additional molecular bridge and the translocation of the incorporated organic ligand. These structural...

article

Rentgenowska dyfraktometria proszkowa w badaniach zabytkowych obiektów. Nowe możliwości badawcze na Wydziale Chemii UJ

Alicja Rafalska-Łasocha, Marta Grzesiak, Marcin Oszajca, Wiesław Łasocha

Opuscula Musealia. Czasopismo muzeologiczne > 2011 > 19 > 25-36

Powder diffraction techniques in studies of historical objects can be applied to the investigations of such substances as pigments, corrosion products of metals and other crystalline artistic materials. Unlike techniques such as X-ray fluorescence (XRF) and other methods of chemical analysis that provide information on elemental composition, XRPD enables the identification and differentiation of materials...

article

Silica covered porphyrin microstructures obtained in sol–gel processes

Magdalena Staszewska, Monika Dzieciuch, Joanna Lewandowska, Mariusz Kepczynski, more

Journal of Sol-Gel Science and Technology > 2011 > 59 > 2 > 276-282

In this article, we report on the formation of well-defined highly emissive silica-covered porphyrin microstructures in base-catalyzed sol–gel processes. The microstructures were obtained by self-assembly of 5,10,15,20-tetrakis(4-hydroxyphenyl)porphyrin (mTHPP) at room temperature. Tetraethoxysilane (TEOS) was used as a silica precursor. The hybrid mTHPP- silica particles were characterized by means...

Publication date

Last 3 years (3)

Close

Date range setting

Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.

From:

To:
Set your own date range

INFONA - science communication portal

Search results for: Marcin Oszajca

Cover Image, Volume 140, Issue 7

Red is the new green: Dry wine‐based miniemulsion as eco‐friendly reaction medium for sustainable atom transfer radical polymerization

Non‐invasive surface analysis of ancient bronze arrowheads with scanning electron microscopy and X‐ray powder diffractometry

Spectroscopic Evidence for Ligand Substitution Reactions at the Solid–Liquid Interface of a Sub‐micrometer Gold(I) Carbene Complex

Spectroscopic Evidence for Ligand Substitution Reactions at the Solid–Liquid Interface of a Sub‐micrometer Gold(I) Carbene Complex

Influence of preparation method on dispersion of cobalt spinel over alumina extrudates and the catalyst deN2O activity

Ladder-chain zinc coordination polymers based on adipic acid dihydrazide precursor: Synthesis and structural transformations

Molybdenum Complexes as Catalysts for the Oxidation of Cycloalkanes with Molecular Oxygen

Mesoporous carbon-containing voltammetric biosensor for determination of tyramine in food products

Crystal structures of 1,8‐bis(dimethylamino)naphthalene (DMAN) and dicarboxylic acids complexes determined from single‐crystal and powder diffraction data

Fine refinement of solid state structure of racemic form of phospho-tyrosine employing NMR Crystallography approach

Bis(4‐methylanilinium) and bis(4‐iodoanilinium) pentamolybdates from laboratory X‐ray powder data and total energy minimization

Synthesis and structure determination of tetrakis(4-iodoanilinum) β-octamolybdate dihydrate

Humidity-Driven Reversible Transformation and Guest Inclusion in a Two-Dimensional Coordination Framework Tailored by Organic Polyamine Cation

Rücktitelbild: Double Switching of a Magnetic Coordination Framework through Intraskeletal Molecular Rearrangement (Angew. Chem. 17/2011)

Double Switching of a Magnetic Coordination Framework through Intraskeletal Molecular Rearrangement

Double Switching of a Magnetic Coordination Framework through Intraskeletal Molecular Rearrangement

Back Cover: Double Switching of a Magnetic Coordination Framework through Intraskeletal Molecular Rearrangement (Angew. Chem. Int. Ed. 17/2011)

Rentgenowska dyfraktometria proszkowa w badaniach zabytkowych obiektów. Nowe możliwości badawcze na Wydziale Chemii UJ

Silica covered porphyrin microstructures obtained in sol–gel processes

Filter options

Publication date

Content availability

Publication language

Keywords

Data set

Journal

INFONA - science communication portal

Search results for: Marcin Oszajca

Add recipient

Sending message cancelled

Are you sure you want to cancel sending this message?

Send message

Filter options

Publication date

Date range setting

Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.

Content availability

Publication language

Keywords

Data set

Journal

Reporting an error / abuse

Sending the report failed

Accessibility options