Search results for "Polyhedra"

showing 3 items of 43 documents

Silseskwioksany i ich zastosowanie w syntezie materiałów polimerowych

2015

Artykuł stanowi przegląd literatury dotyczącej syntezy oraz charakterystyki materiałów polimerowych zawierających silseskwioksany (POSS). Przedstawiono metody otrzymywania hybrydowych materiałów polimerowych z udziałem funkcjonalizowanych POSS na drodze click chemistry, polikondensacji, poliaddycji, metatezy z otwarciem pierścienia ipolimeryzacji rodnikowej zarówno konwencjonalnej, jak i kontrolowanej (ATRP).

poliedryczne oligomeryczne silseskwioksany (POSS)ring opening metathesis polymerizationpolimeryzacja wolnorodnikowamateriały hybrydoweATRPpoliaddycjapolikondensacjametateza z otwarciem pierścieniaclick chemistryhybrid materialspolycondensationpolyadditionfree-radical polymerizationpolyhedral oligomeric silsesquioxane (POSS)Polimery
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Low-temperature single crystal X-ray diffraction and high-pressure Raman studies on [(CH3)2NH2]2[SbCl5]

2007

The structure of bis(dimethylammonium) pentachloroantimonate(III), [(CH{sub 3}){sub 2}NH{sub 2}]{sub 2}[SbCl{sub 5}], BDP, was studied at 15 K and ambient pressure by single-crystal X-ray diffraction as well as at ambient temperature and high pressures up to 4.87(5) GPa by Raman spectroscopy. BDP crystallizes in the orthorhombic Pnma space group with a=8.4069(4), b=11.7973(7), c=14.8496(7) A, and Z=4; R{sub 1}=0.0381, wR{sub 2}=0.0764. The structure consists of distorted [SbCl{sub 6}]{sup 3-} octahedra forming zig-zag [{l_brace}SbCl{sub 5}{r_brace}{sub n}]{sup 2n-} chains that are cross-linked by dimethylammonium [(CH{sub 3}){sub 2}NH{sub 2}]{sup +} cations. The organic and inorganic substr…

polyhedral distortionsChemistrySpace groupCrystal structureCondensed Matter Physicshydrogen bondingElectronic Optical and Magnetic MaterialsInorganic ChemistryCrystallographysymbols.namesakechloroantimonates(III)Chemical bondOctahedronphase transitionX-ray crystallographyMaterials ChemistryCeramics and CompositessymbolsOrthorhombic crystal systemPhysical and Theoretical ChemistryRaman spectroscopySingle crystalJournal of Solid State Chemistry
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A library of monoalkenylsilsesquioxanes as potential comonomers for synthesis of hybrid materials

2018

In this paper we demonstrate a facile and efficient synthesis of monoalkenylsubstituted POSS compounds, i.e., R7(Si8O12)-alkenyl and R7(Si8O12)(OSiMe2)-alkenyl with a functional alkenyl group of chain length (from vinyl to dec-9-enyl, with or without additional –OSiMe2– spacer between the silsesquioxane core and alkenyl moiety) and with five types of inert groups (Et, iBu, iOc, Cy, Ph) at the POSS core. These compounds constitute a library of monosubstituted POSS systems, including thorough spectroscopic and thermal characteristics. These findings could be especially useful for material chemists applying the compounds as modifiers or comonomers for copolymerization reaction, e.g., with olef…

thermal propertiespolyhedral oligomeric silsesquioxanes02 engineering and technology010402 general chemistry021001 nanoscience & nanotechnologyCondensed Matter Physics01 natural sciencesalkenylsubstituted silsesquioxanesthermal stabilitySilsesquioxane0104 chemical scienceschemistry.chemical_compoundChain lengthchemistryCopolymerOrganic chemistryMoietyPhysical and Theoretical Chemistry0210 nano-technologyHybrid materialJournal of Thermal Analysis and Calorimetry
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