Original title:
Příprava a studium selenanů a seleničitanů tetraalkylamonných
Translated title:
Preparation and characterization of tetraalkylammonium selenates and selenites
Authors:
Stejskal, Jan Document type: Rigorous theses
Year:
2017
Language:
cze Abstract:
[cze][eng] V rámci své práce zaměřené na přípravu a studium nových materiálů vhodných k protonové vodivosti byly připraveny a charakterizovány dvě nové tetraalkylamonné(semi- organické) soli hydrogenselenanů tetrapropylamonného (tetra -n-propylammonium(1+) a tetrabutylamonného (tetra -n-butylammonium(1+) . Hydrogenselenan tetrapropylamonný (Tetra -n-propylammonium(1+) (a = 15.8040(2) Å, b = 15.3900(2) Å, c = 40.4350(5) Å, V = 9834.7(2)3 , pro 5992 pozorovaných odrazů) a hydrogenselenan tetrabutylamonný (tetra tetra - n-butylammonium(1+) (a = 15.0870(3) Å, b = 15.3380(4) Å, c = 17.4750(4) Å, V = 4043.79(16)3 , Z = 8, R = 0.0432 pro 3335 pozorovaných odrazů) krystalizují v centrosymetrickych prostorových grupách Pbcn a Pccn respektive v ortorombické soustavě. Obě soli byli také charakterizované metodami vibrační spektroskopie (FTIR a FT Ramanovou spektroskopii). Interpretace vibračních spekter vychází z ab initio výpočtu. Krystalická struktura třetí analogické sloučeniny, hydrogenselenanu tetraethylamonného (tetra -n-ethylammonium(1+) byla stanovena při 150 K (a = 8.2109(17) Å, b = 9.072(2) , c = 9.431(3) Å, α = 77.13 (3) ž, β = 74.43 (2) ž, γ = 63.62 (3) ř, V = 601.89(3)3 , Z = 2, R = 0,0167 pro 2237 pozorovaných odrazů). Tato sloučenina krystalizuje v centrosymetrické prostorové grupě p-1 trojklonné soustavě...In my work on the preparation and study of new materials suitable for proton conductivity, there were prepared and characterized two novel semi-organic salts of tetra-n- propylammonium (1+) and tetra-n-butylammonium (1+) hydrogen selenate have been prepared and characterised. Tetra-n-propylammonium (1+) hydrogen selenate (a=15.7949(6) Å, b=15.3876(6) Å, c=40.4384(17) Å, V=9828.4(7) Å3 , Z=8 for 8775 observed reflections) and tetra-n-butylammonium (1+) hydrogen selenate (a=15.0870(3) Å, b=15.3380(4) Å, c=17.4750(4) Å, V=4043.79(16) Å3 , Z=8, R=0.0432 for 3335 observed reflections) crystallise in the centrosymmetric space groups Pbcn and Pccn of the orthorhombic system, respectively. Both salts were also characterised by the methods of vibrational spectroscopy (IR and Raman). The interpretation of the vibrational spectra is based on ab initio calculations of the isolated cations. The crystal structure of the third analogous compound, tetra-n-ethylammonium(1+) hydrogen selenate was redetermined at 150 K (a=8.2109(17) Å, b=9.072(2) Å, c=9.431(3) Å, α=77.13(3)ž, β=74.43(2)ž, γ=63.62(3)ž, V=601.89(3) Å3 , Z=2, R=0.0167 for 2237 observed reflections). This compound crystallises in centrosymmetric space group P-1 of the triclinic system and was previously studied only at room temperature. Key word:...
Institution: Charles University Faculties (theses)
(web)
Document availability information: Available in the Charles University Digital Repository. Original record: http://hdl.handle.net/20.500.11956/87743
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