|
|
Synthesis of novel porous coordination polymers, their characterization and solvothermal stability
Ondrušová, Soňa ; Lang, Kamil (advisor) ; Tyrpekl, Václav (referee)
This diploma thesis builds on the already published work, in which phosphinate analogs of terephthalic acid were used to prepare new stable metal-organic frameworks (MOFs) Fe-ICR- 2 and Fe-ICR-4. With the use of analogous biphenylene linkers, two new Fe-MOFs were prepared - Fe-ICR-6 and Fe-ICR-7. Isoreticular MOFs were also prepared using Al3+ metal centers. These materials were characterized by X-ray powder diffraction and adsorption isotherm measurements. Their solvothermal stability was measured after shaking and refluxing in water, ethanol, and toluene and activation from water. Furthermore, their thermal stability and the disintegration mechanism in air were determined by thermal analysis. Keywords: coordination polymer, metal-organic framework, stability, phosphinate
|
|
|
Synthesis of novel porous coordination polymers, their characterization and solvothermal stability
Ondrušová, Soňa ; Lang, Kamil (advisor) ; Tyrpekl, Václav (referee)
This diploma thesis builds on the already published work, in which phosphinate analogs of terephthalic acid were used to prepare new stable metal-organic frameworks (MOFs) Fe-ICR- 2 and Fe-ICR-4. With the use of analogous biphenylene linkers, two new Fe-MOFs were prepared - Fe-ICR-6 and Fe-ICR-7. Isoreticular MOFs were also prepared using Al3+ metal centers. These materials were characterized by X-ray powder diffraction and adsorption isotherm measurements. Their solvothermal stability was measured after shaking and refluxing in water, ethanol, and toluene and activation from water. Furthermore, their thermal stability and the disintegration mechanism in air were determined by thermal analysis. Keywords: coordination polymer, metal-organic framework, stability, phosphinate
|
|
|
Production of singlet oxygen by metal-organic frameworks
Ondrušová, Soňa ; Lang, Kamil (advisor) ; Kubíček, Vojtěch (referee)
In the presented thesis, metal-organic framework (MOF) PCN-222 was post-synthetically modified with diphenylphosphinic acid. The parent PCN-222 and modified MOFs were characterized by powder X-ray diffractions and nitrogen adsorption isotherms. The presence of bound diphenylphosphinic acid in the modified MOFs was documented by inductively coupled plasma optical emission spectrometry, infrared spectroscopy, and 13 C and 31 P solid- state NMR. The modified MOFs have greater water-drying stability and up to four times higher singlet oxygen productivity under visible light irradiation than the parent PCN-222. Keywords: metal-organic framework, porphyrin, post-synthetic modifications, diphenylphosphinic acid, singlet oxygen, stability
|
guest ::
