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Identifier 000410646
Title Ανάπτυξη νέων πορωδών πολυμερών συναρμογής (MOFs) βασισμένων σε λειτουργικούς οργανικούς υποκαταστάτες
Alternative Title Development of new porous coordination polymers (MOFs) based on functionalized organic linkers
Author Βλαχάκη, Στυλιανή Μ.
Thesis advisor Τρικαλίτης, Παντελής Ν.
Reviewer Μήλιος, Κωνσταντίνος
Φρουδάκης, Γεώργιος
Abstract Traditional porous materials, such as activated carbons and zeolites, have extensively been studied for several years as adsorbents in various applications. However, modern key applications require specific characteristics in terms of gas uptake, separation and storage, including high surface areas, functional groups and the ability for further chemical modification of the framework. All these are not fulfilled in the above materials. Metal Organic Frameworks (MOFs), are novel crystalline porous materials that have attracted considerable attention due to their unique properties, including high surface areas and porosities, and thermal and chemical stability. These materials have the advantage that they can be extensively modified, in order to acquire desired properties. MOFs have applications in many fields. Two of these are gas storage and gas separation for gases that are environmentally relevant. These gases are CO2, H2 and CH4. In this research, MOFs have been studied for these applications. In this work, fourteen new MOFs were synthesized and characterized. Their synthesis was based on their targeted design following a judicious selection and careful combination of organic and inorganic components. All MOFs were characterized using powder X-ray diffraction. Single crystal X-ray diffraction measurements were performed in the case of single crystalline materials. Where was necessary, elemental analysis, EDS was performed. In most materials their porosity have been studied, and in three of them detailed gas adsorption measurements under specific conditions of pressure and temperature, which allow direct comparison with the literature, were performed. These three materials have shown very good results in gas adsorption, but for different application each of them. Material 1, DMA2 [Dy63-OH) 8L6] exhibits high uptake values for CO2, H2 and CH4 compared to other similar non-functionalized materials. Materials 12, (DMA) 4 [Mg3 (OH) 2L2] and 13, Mg-L have shown quite high interactions with CO2. Material 12 exhibits also a very good selectivity of CO2 over CH2 at 273Κ and 298K, while material 13 exhibits a quite good selectivity of CO2 over N2 at 298Κ. Furthermore, many trials have been made to fully activate three quite promising materials that had already been synthesized in the laboratory. In the present Thesis, after we present the scope of our work, an introduction about MOFs takes place, followed by the results and discussion of the synthesized materials.
Language Greek
Subject Gas separation
Gas storage
Porous materials
Reticular chemistry
Targeted design of materials
Αποθήκευση αερίων
Διαχωρισμός αερίων
Διχτυωτή χημεία
Πορώδη υλικά
Στοχευμένος σχεδιασμός υλικών
Issue date 2017-07-21
Collection   School/Department--School of Sciences and Engineering--Department of Chemistry--Post-graduate theses
  Type of Work--Post-graduate theses
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