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    Tytuł:
    Katalizatory palladowe immobilizowane w materiałach typu MOF aktywne w reakcjach uwodornienia
    Palladium catalysts immobilized in MOF materials active in hydrogenation reactions
    Autorzy:
    Augustyniak, Adam W.
    Trzeciak, Anna M.
    Powiązania:
    https://bibliotekanauki.pl/articles/172135.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Chemiczne
    Tematy:
    sieci metaliczno-organiczne
    kataliza
    pallad
    uwodornienie
    selektywność
    metal-organic frameworks
    catalysis
    palladium
    hydrogenation
    reaction
    selectivity
    Opis:
    Palladium immobilized in metal-organic frameworks (MOF) exhibit promising catalytic properties in hydrogenation of different unsaturated substrates. Due to the specific porous and crystalline structure MOFs can contribute in bonding and activation of organic substrates, increasing catalytic efficiency of Pd@MOF composites. The superior tunability of MOFs structures enables to design highly selective catalysts for hydrogenation of different substrates, such as olefins, esters, ketones, alcohols or alkynes. Due to the synergistic effects of palladium and MOF not only high activity but also high selectivity can be achieved. The article presents representative examples of MOF-based palladium catalysts for hydrogenation to illustrate perspectives, also technological, of their application.
    Źródło:
    Wiadomości Chemiczne; 2019, 73, 3-4; 221-241
    0043-5104
    2300-0295
    Pojawia się w:
    Wiadomości Chemiczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Polimery koordynacyjne wanadu : stan obecny i perspektywy
    Vanadium coordination polymers : state of art and perspectives
    Autorzy:
    Augustyniak, Adam W.
    Powiązania:
    https://bibliotekanauki.pl/articles/1411134.pdf
    Data publikacji:
    2021
    Wydawca:
    Polskie Towarzystwo Chemiczne
    Tematy:
    wanad
    sieci metaliczno-organiczne
    MOFs
    wielościany metaliczno-organiczne
    MOP
    vanadium
    metal-organic frameworks
    metal-organic polyhedral
    Opis:
    Vanadium ions are very attractive building units owing to their coordination diversity. In recent years, metal-organic polyhedra (MOP) and metal-organic frameworks (MOFs) have gradually become attractive materials in various fields due to their unique properties. However, despite this, structures based on vanadium ions are scarce. This short perspective review paper describes representative examples of MOP and MOFs based vanadium, focusing on their structure and their applications.
    Źródło:
    Wiadomości Chemiczne; 2021, 75, 3-4; 253-269
    0043-5104
    2300-0295
    Pojawia się w:
    Wiadomości Chemiczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Kompozyty z materiałów węglowych i metalo-organicznych (MOF)
    Composites of carbonaceous materials and metal-organic frameworks
    Autorzy:
    Bieniek, A.
    Wiśniewski, M.
    Terzyk, A. P.
    Bolibok, P.
    Dembek, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/297692.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
    Tematy:
    composites
    carbonaceous materials
    MOF
    metal-organic frameworks
    kompozyty
    materiały węglowe
    struktury metaloorganiczne
    Opis:
    The paper presents a brief review of the literature in the field of composites made of carbon materials and MOF structures. It focuses on presenting numerous examples of composites and the positive effects of the merger of these groups of materials. The new class of composites combines carbon materials with the functionality of inorganic materials. These composites offer a chance to eliminate weaknesses and enhance the capacity of each group. These composites proved that integrating MOF materials with carbonaceous materials can not only convert a significant weakness of MOF, but also surprisingly bring many new features such as improved resistance, i.e. for moisture, and electrical conductivity. These composites broaden the horizons of applications in the fields of adsorption, separation, catalysis, electrochemistry and sensors. In the future, using a variety of MOF structures and carbonaceous materials, newly formed composites will probably push the boundaries of cognition in many fields.
    Praca przedstawia krótki przegląd literaturowy z zakresu kompozytów złożonych z materiałów węglowych oraz materiałów metalo-organicznych (ang. metal-organic frameworks, MOF). Skupia się na zaprezentowaniu licznych przykładów tworzenia kompozytów z powyższych grup materiałów oraz ukazaniu pozytywnych efektów takiego postępowania. Nowa klasa kompozytów łączy cechy materiałów węglowych z funkcjonalnością materiałów nieorganicznych. Kompozyty te dają szansę na wyeliminowanie wad i lepsze wykorzystanie potencjału każdej z grup. Poprzez integrację materiałów MOF z materiałami węglowymi można nie tylko znacząco zminimalizować wady MOF, ale, co więcej, uzyskać wiele nowych funkcji, takich jak poprawa odporności, np. na wilgoć, czy przewodności elektrycznej. Dzięki tym kompozytom poszerzają się horyzonty aplikacyjne w dziedzinach adsorpcji, separacji, katalizy, a także elektrochemii i sensorów. W przyszłości korzystając z różnorodności struktur MOF i materiałów węglowych, nowo powstałe kompozyty, podobnie jak MOF i materiały węglowe, być może pozwolą przesunąć granice poznawcze w wielu dziedzinach.
    Źródło:
    Inżynieria i Ochrona Środowiska; 2016, 19, 3; 319-329
    1505-3695
    2391-7253
    Pojawia się w:
    Inżynieria i Ochrona Środowiska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Znaczenie mikroporowatych materiałów metaloorganicznych (MOF ) dla potrzeb magazynowania wodoru
    Microporous metal-organic frameworks for hydrogen storage
    Autorzy:
    Czub, J.
    Gondek, Ł
    Figiel, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/172476.pdf
    Data publikacji:
    2012
    Wydawca:
    Polskie Towarzystwo Chemiczne
    Tematy:
    materiały metalo-organiczne
    materiały mikroporowate
    MOF
    adsorpcja
    magazynowanie wodoru
    metal-organic frameworks
    microporous materials
    adsorption
    hydrogen storage
    Opis:
    Currently, the metal-organic frameworks (MOF s) are considered among the most promising materials for hydrogen storage. In this paper, the properties of MOF s that are particularly important for application purposes are presented. Examples include simplicity of their syntheses on an industrial scale, low synthesis costs, high thermal stability and durability, an excellent repeatability and very low degree of degradation during cyclic hydrogen loading and recovery. On the other hand, the potential use of MOF s as hydrogen reservoirs is to some extent limited due to the fact that the low temperatures of 77 K are required for effective adsorption of hydrogen in the microporous structures of MOF s. Nowadays, the research on MOF s is carried in two directions. In particular, there are intensive studies on increasing of the concentration of hydrogen adsorbed at low temperatures in order to determine the limiting value for which maintaining the reservoir at the temperature of liquid hydrogen would be economically viable. It seems that the limiting concentration is being currently reached. The second direction of research is to increase the limiting value of temperature at which the concentration of adsorbed hydrogen is acceptable.
    Źródło:
    Wiadomości Chemiczne; 2012, 66, 3-4; 227-247
    0043-5104
    2300-0295
    Pojawia się w:
    Wiadomości Chemiczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Metal-organic frameworks for efficient drug adsorption and delivery
    Autorzy:
    Hyjek, Kornelia
    Jodłowski, Przemysław
    Powiązania:
    https://bibliotekanauki.pl/articles/35134841.pdf
    Data publikacji:
    2023
    Wydawca:
    Radomskie Towarzystwo Naukowe
    Tematy:
    drug delivery systems
    metal-organic frameworks
    synthesis
    characterization
    drug loading
    biocompatibility
    systemy dostarczania leków
    sieć metalo-organiczna
    synteza
    charakterystyka
    akumulacja leku
    biokompatybilność
    Opis:
    In recent years, the number of materials used as drug delivery systems (DDS) has increased dramatically. The widespread use of DDSs has improved both the safety and efficacy of therapy. The systems currently in use pose numerous drawbacks and require proper improvements. Although many modern materials are being developed, metal-organic frameworks (MOFs) deserve special attention. Thermal and chemical stability, high specific surface area, low toxicity, high biocompatibility, and great potential for modification are the main features enabling MOFs to be used as DDS. In this review, we describe MOFs, their structure, synthesis, and characterization, as well as drug loading, drug release kinetics, and bioassays. A critical approach is to outline the disadvantages as well as the limitations of MOFs and to identify areas that need to be studied more thoroughly. Nonetheless, the prospective nature of MOFs as DDS and potential adsorbents in overdose or poisoning is presented and highlighted.
    Źródło:
    Scientiae Radices; 2023, 2, 2; 115-189
    2956-4808
    Pojawia się w:
    Scientiae Radices
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sieci metalo-organiczne jako multifunkcjonalne materiały przyszłości : mechanochemiczne podejście do syntezy
    Metal-organic frameworks as multifunctional materials of the future : mechanochemical approach to synthesis
    Autorzy:
    Jędrzejowski, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/171620.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Chemiczne
    Tematy:
    sieć metalo-organiczna
    mechanochemia
    mechanosynteza
    polimery koordynacyjne
    chemia koordynacyjna
    materiały porowate
    materiały multifunkcjonalne
    metal-organic frameworks
    mechanochemistry
    mechanosynthesis
    coordination polymer
    coordination chemistry
    porous materials
    multifunctional materials
    Opis:
    Metal-organic frameworks (MOFs) are a relatively new class of advanced inorganic-organic materials. Due to their modular structures and possible incorporation of various properties, that materials find more and more applications in many fields of science and industry. MOFs are coordination polymers, i.e. compounds with coordination bonds propagating infinitely in at least one dimension. Their characteristic feature is the presence of potential free spaces, i.e. pores. The free spaces often appear after proper activation, e.g. thermal activation. Other common properties of MOFs include for instance large specific surface areas and pore volumes, modifiable size and chemical environment of the pores, and network flexibility. All these properties result in the use of MOFs in e.g. selective sorption, separation or storage of gases, heterogeneous catalysis, design and fabrication of sensors, etc. During more than twenty years of the history of MOFs, many methods of their synthesis have been developed, including the most popular in solution at elevated temperatures (e.g. solvothermal method). Nevertheless, the activity of pro-ecological environments and the requirements set by international organizations encourage scientists to create new methods of synthesis, which, according to the guidelines presented by the 12 principles of green chemistry, will be safer, less aggressive, less toxic and less energy-consuming. One of the answers to meet these requirements is the use of mechanosynthesis. Mechanochemical synthesis relies on the supply of energy to a system by mechanical force, by grinding or milling. By combining or transforming solids in this way, the presence of a solvent, which is most often the main source of contamination and waste, can be minimised or completely excluded. Mechanical force is typically used for purposes other than MOF synthesis, e. g. catalyst grinding. Nevertheless, the use of mechanical force in synthesis is becoming more and more popular. The most important advantages of this approach, apart from its environmental impact, are very high efficiency (usually close to 100%) and drastically reduced reaction time. Of course, there are examples where these advantages are not observed. In such cases, mechanosynthetic modifications are introduced, such as e.g. addition of small amount of liquid (Liquid-Assisted Grinding) and/or a small addition of simple inorganic salt (Ion- and Liquid-Assisted Grinding). Furthermore, new instrument setups are being developed to monitor reaction mixtures in situ during mechanosynthesis, e.g. by use of such techniques as powder X-ray diffraction and Raman spectroscopy. This enables valuable insights into mechanisms and allows for mechanosynthesis optimization.
    Źródło:
    Wiadomości Chemiczne; 2018, 72, 9-10; 645-666
    0043-5104
    2300-0295
    Pojawia się w:
    Wiadomości Chemiczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A method for production of nanoMOF and prelimiary characterization by selected analytical techniques
    Autorzy:
    Starosta, W.
    Sartowska, B.
    Łyczko, K.
    Maurin, J.
    Pawlukojć, A.
    Waliś, L.
    Buczkowski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/146902.pdf
    Data publikacji:
    2012
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    HKUST-1
    metal-organic frameworks (MOFs)
    solvothermal method
    template synthesis
    Opis:
    Metal-organic frameworks (MOFs) are a class of porous hybrid materials comprising metal ion-based vertices and multitopic organic ligands (linkers). The possibility of combining a wide range of metals with similarly large number of available ligands opens ways to design the structures meeting specific purposes. At present, many potential applications of MOFs may require them to be constructed at the nanometer length scale (nanoMOFs). The possibility of filling the track-etched membrane pores with MOF HKUST-1 has been demonstrated in this work.
    Źródło:
    Nukleonika; 2012, 57, 4; 581-583
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Otrzymywanie i właściwości adsorpcyjne sieci metaloorganicznych
    Synthesis and adsorption properties of metal-organic frameworks
    Autorzy:
    Szeligowska, S.
    Choma, J.
    Jaroniec, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/171540.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Chemiczne
    Tematy:
    sieci metaloorganicze
    MOF
    synteza materiałów MOF
    adsorpcja
    CO2
    adsorpcja H2
    metal-organic frameworks
    synthesis of MOF materials
    adsorption
    H2 adsorption
    Opis:
    MOF materials or metal-organic frameworks are compounds consisting of metal ions or clusters (metal junctions) and organic ligands (bridging groups) connected via coordination bonds. Since a variety of organic ligands and metal junctions is available, metal-organic frameworks of desired composition and structures can be synthesized. These compounds are relatively new, intensively studied, their number is continuously growing from year to year. Metalorganic frameworks may also possess elastic properties due to the presence of coordination bonds in their structure. A distinct feature of MOF materials, which differentiates them from other sorbents, is the possibility of changing their pore structure under influence of external stimuli and the ability of adjusting their pore size to the dimensions of the adsorbed molecules. An interesting phenomenon observed in these materials is the so-called “breathing” effect that is manifested by drastic changes in the pore volume upon external stimuli such as temperature, pressure, type of adsorbate, presence of solvent. There are numerous methods for the preparation of MOF materials: solvothermal, electrochemical, mechanochemical, sonochemical and microwave-assisted syntheses. An additional activation of these materials is often required to remove the remaining solvents from pores and consequently, increase their adsorption capacity. The latter can be also increased by additional modifications that can be used to tune their physicochemical properties, and especially porosity. Due to the excellent adsorption properties of MOF, especially very high BET specific surface area (up to 6200 m2/g) and large pore volume, these materials have been intensively studied for capture or storage of various gases such as CO2, H2 and CH4. Applications of metal-organic frameworks are continuously growing and range from gas storage, chemical sensors and phosphors to medicine, where they are used as drug carriers.
    Źródło:
    Wiadomości Chemiczne; 2017, 71, 5-6; 299-322
    0043-5104
    2300-0295
    Pojawia się w:
    Wiadomości Chemiczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Przewodnictwo protonowe w sieciach metalo-organicznych : nowe możliwości w technologii ogniw paliwowych
    Proton conduction in metal-organic frameworks : new possibilities in fuel cell technology
    Autorzy:
    Szufla, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/171542.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Chemiczne
    Tematy:
    sieć metalo-organiczna
    przewodnictwo protonowe
    ogniwo paliwowe
    metal-organic frameworks
    proton conduction
    fuel cell
    Opis:
    Nowadays energy demands are huge and still increasing. This fact drives the search for modern technologies which are economically advantageous and environmentally friendly. A fuel cell technology is one of many solutions and hydrogen fuel cells are especially important. The essential element of such a cell is the electrolytic membrane which makes proton transfer possible. In this article, selected examples of metal-organic frameworks (MOFs) that can be used as proton-conducting membranes are described. Porous structure of such materials as well as the existence of proton-donating and accepting groups on their pore walls allow for creation of hydrogen bonding network enabling the proton hopping (Grotthuss’s conduction mechanism). The conduction can also occur on the way of diffusion of bigger ions, e.g. H3O+ (vehicular conduction mechanism) Proton conducting MOFs can be divided according to temperature in which these materials can operate. There are two regimes – below 100°C – conductivity in MOFs is aided by the presence of water molecules, and above 100°C – conductivity does not depend on humidity. Important group among MOFs conductive under low-temperature conditions are oxalate-based frameworks. Taking into account synthetic methods, interesting case is the MOF reported by Matoga and co-workers, which was obtained on the way of economically and environmentally friendly mechanosynthesis. High proton conductivity in metal-organic frameworks can be achieved not only when channels are filled with water molecules but also by introduction of non- -volatile organic compounds to framework voids or by incorporating them into the framework. Imidazole, 1,2,4-triazole, pyrazoline or histamine may play the role of such compounds. Remarkable examples of this strategy include the MOF reported by Kitagawa and co-workers, where 1,2,4-triazole molecules are incorporated into the framework as well as the material in which proton conduction occurs owing to the presence of imidazole guest molecules.
    Źródło:
    Wiadomości Chemiczne; 2018, 72, 3-4; 147-163
    0043-5104
    2300-0295
    Pojawia się w:
    Wiadomości Chemiczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zastosowanie polikarboksylanowych związków kompleksowych w tworzeniu sieci metaloorganicznych typu MOF
    Application of polycarboxylate comlexes in the formation of metal-organic frameworks
    Autorzy:
    Zych, Dominika
    Drzeżdżon, Joanna
    Jacewicz, Dagmara
    Chmurzyński, Lech
    Powiązania:
    https://bibliotekanauki.pl/articles/171746.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Chemiczne
    Tematy:
    związki metaloorganiczne typu MOF
    trójwymiarowa struktura
    fizykochemiczne właściwości związków typu MOF
    zastosowanie związków typu MOF
    Metal–Organic Frameworks
    MOF
    three-dimensional framework structure
    physicochemical properties of MOF
    applications MOFs
    Opis:
    The first research on Coordination Polymers began at the beginning of the 20th century. Wider understanding of their structure has enabled the development of crystallography. Since then compounds, which belong to this group, have been the subject of broad-spectrum scientific research. A particular class of these compounds, known relatively recently, are Metal–Organic Frameworks (MOF). The MOF structure is based on negatively charged organic linkers, e.g. polycarboxylic anions connected to various metal cations or metal clusters. MOFs are mainly built up from metal cations: transition, alkaline earth, main groups of the periodic table, as well as rare earth metals. Moreover, organic ligands used in the construction of MOF materials should contain electron donors. A characteristic bond, that allows the formation of hybrids, through the interactions of nodes and bridges is the coordination bond. It allows to synthesize a three-dimensional framework structure. Modern synthesis leads to the generation of porous materials with a very large surface area of pores and unique properties. Considering their synthesis, crystalline structures and physicochemical properties of MOF, as well as broad MOFs applications including gas storage, separation, catalysts, luminescence, magnetism and others, it is reasonable to state that MOFs can be used in many areas, not only in science, but also in environmental protection and in industry, for example, energy industry, chemical and biochemical industry.
    Źródło:
    Wiadomości Chemiczne; 2019, 73, 5-6; 401-423
    0043-5104
    2300-0295
    Pojawia się w:
    Wiadomości Chemiczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-10 z 10

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