Wyniki wyszukiwania - BazTech

1

Nagroda Nobla w dziedzinie chemii za 2025 r.

Polaczek Jerzy

Przemysł Chemiczny

|

2025

|

T. 104, nr 11

1055--1057

2

From Waste to Resource: Upcycling PET into High-Performance MOFs for Advanced Applications

Ma Rumeng, Wang Song

Green Sciences

|

2025

|

Vol. 27, nr 3

10--23

EN

Due to the non-degradable nature of polyethylene terephthalate (PET) and the widespread use in food packaging, clothing, and other fields of PET, discarded PET waste continues to accumulate globally, posing significant risks to both the environment and human health. Through chemical recycling methods, PET waste can be decomposed into terephthalic acid (TPA), which serves as an organic linker of metal-organic frameworks (MOFs) and demonstrates potential for achieving PET waste upcycling, thus garnering considerable attention. MOFs prepared from PET waste have been extensively applied in fields such as adsorption, catalysis, and energy storage. This review aims to analyze the latest research advancements concerning the MOFs prepared from PET waste to provide insights for further development in both the preparation and application of MOFs prepared from PET waste. The comprehensive analysis of this review highlights the innovative pathways toward addressing environmental challenges while enhancing the utility of recycled resources.

3

Synthesis, properties and prospective medical applications of metal-organic frameworks

Hyjek Kornelia, Jodłowski Przemysław J., Kuterasiński Łukasz, Piskorz Witold

Chemical and Process Engineering : New Frontiers

|

2025

|

Vol. 46, nr 2

art. no. e89

EN

Researchers strive to develop novel delivery systems for therapeutic substances and new therapies. The aim is to maximize the efficacy of conducted therapy while maintaining controlled drug delivery profiles and minimizing the side effects of therapy. Currently, numerous methods of drug administration are in use. Simultaneously, novel potential drug cargos, such as metal-organic frameworks, quantum dots, carbon nanotubes, or dendrimers, are under vigorous investigation. This paper aims to consider metal-organic frameworks (MOFs), which are composed of metal ions/clusters coordinated to organic linkers forming one-, two-, or three-dimensional materials with unprecedentedly large specific surface areas, high porosity, and a capability of a high degree of modifications. They have many potential applications, and due to their low toxicity, high biocompatibility, and bioavailability, they are considered materials of the “medicine of the future”. This review presents the state-of-the-art concerning the recent progress on the metal-organic frameworks, particularly on synthesis and characterization of MOFs, including their classification and possibilities of their modification. In the present paper, the recent state-of-the-art of biomedical applications, such as innovative cancer therapy, bone regeneration, bioimaging, biosensing, and upgrade delivery system based on MOFs is provided. Furthermore, MOF’s toxicity and forward-looking perspectives have been thoroughly discussed.

4

Molecular Interactions Between Polyurethane and UiO-66 in Polymer-MOF Nanocomposites: Microstructural and Mechanical Effects

Ahmad Syazwana, Omar Mohd Firdaus, Mahdi E. M., Halim Khairul Anwar Abdul, Abd Rahim Shayfull Zamree, Akil Hazizan Md, Nosbi Norlin, Yudasari Nurfina, Hassan Muhammad Hafiz, Saleh Siti Shuhadah Md, Othman M. B. H.

Archives of Metallurgy and Materials

|

2025

|

Vol. 70, iss. 1

199-209

EN

The demand for polymer-based nanocomposite-reinforced nanoporous materials is becoming essential in sustainable development studies. Integrating nanoporous materials such as Metal-Organic Frameworks (MOFs) in polymer matrices is essential for developing sustainable advanced materials. Combining MOFs and polymer matrices can produce a hybrid material with improved mechanical strength and stability relative to its constituents. This study aims to elucidate the effect of synthesised UiO-66 nanoparticles in a polyurethane (PU) matrix on the subsequent hybrid materials’ microstructural and mechanical properties. UiO-66 nanoparticles were synthesised at 120°C, 130°C, and 140°C. The nanoparticles and subsequent nanocomposite were characterised using X-ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FT-IR), Brunauer-Emmett-Teller (BET), and Field Emission-Secondary Electron Microscopy (FE-SEM). The experimental findings indicate that the UiO-66 nanoparticles synthesised at 130°C exhibited a highly desirable crystal structure and effective adsorption properties, and the nanoparticles synthesised at this temperature were then used to reinforce PU, forming a polymer-MOF nanocomposite. The mechanical properties of the resulting nanocomposite were determined using tensile and nanoindentation tests. The UiO-66 nanoparticles were incorporated into PU matrices at various weight percentages (10 wt.%, 20 wt.%, 30 wt.%, and 40 wt.%) via the solution casting technique. The results indicated that 30 wt.% UiO-66 in the polymer nanocomposite exhibits the best mechanical properties, and loading the polymer nanocomposite beyond 30 wt.% is more likely to result in nanoparticle agglomeration and brittle behaviours.

5

Szkielety metalo-organiczne do zastosowań w zakresie ochrony środowiska

Baluk Mateusz Adam, Trzebiatowska Patrycja Jutrzenka, Pieczyńska Aleksandra

Wiadomości Chemiczne

|

2024

|

[Z] 78, 3-4

189--217

EN

Current challenges related to climate change, environmental degradation, and the increasing energy demand impose an urgent need for society to seek innovative solutions in environmental protection. In response to these issues, scientists have been developing areas related to novel functional nanomaterials for years. Among these materials, particular attention is drawn to metal-organic frameworks (MOFs), a new type of porous coordination polymers built from metal centers and organic ligands. The exceptional properties of MOFs come from their porous structure exhibiting high surface area, low density, large pore volume, also recyclability and the ability to regulate pore size and activity by selecting appropriate building blocks. MOFs can be synthesized by various routes and the most popular methods are the following: solvo-(hydro)thermal, mechanochemical, electrochemical, sonochemical or microwave-assisted synthesis. The type of synthesis influences the MOFs properties such as crystal size, specific surface area or possibility of scalable. Furthermore, MOFs activity in sorption or catalysis can be enhanced by postsynthetic modification (PSM), which enables the introduction of new functional groups or particles on/into MOF. Thanks to these properties and tunability, MOFs are finding increasingly broad applications in various processes that can serve different functions such as catalysts, photocatalysts, or sorbents. Due to the possibility of control of pore structure, their adsorption properties, and the nature of active sites, lately, MOFs and MOF-based materials have been investigated in gas adsorption and separation, hydrogen storage, CO2 capture, chemical sensing, electrochemical water splitting, biomass conversion, polymerization and drug delivery. This article will provide general information about the structure and key properties of MOFs, as well as methods of their synthesis and possibilities for modification. However, the focus will primarily be on indicating the various applications of MOFs in environmental applications (Figure 1). The use of MOFs in processes for removing organic and inorganic pollutants from water, air purification, gas separation, pollutant detection, and fuel generation and storage will be discussed. Additionally, the potential uses of MOFs as catalysts in transesterification processes, CO2 fixation, depolymerization, or biomass conversion will be highlighted.

6

Od mofów „w pigułce” do pigułek w mofie : przewodnik teoretyczno-praktyczny

Pander Marzena, Skałecka Natalia, Prus Julia, Stani Oliwia, Bury Wojciech

Wiadomości Chemiczne

|

2024

|

[Z] 78, 11-12

1697--1729

EN

The design, synthesis, and characterization of novel materials with unique properties represent an important field of modern chemistry. Metal-Organic Frameworks (MOFs) [1], a class of porous coordination polymers, exemplify such innovative materials. Despite their initial discovery less than 30 years ago, the field of MOFs has expanded rapidly, and is represented now by over 100 000 different structures [2]. The precise design of organic and inorganic building blocks (metal nodes and organic linkers), which can be regarded as chemical Lego® bricks, enables the realization of an almost limitless array of structural architectures, limited only by the imagination of a chemist. This versatility offers the potential to create advanced materials with tailored properties for specific applications, which include sorption and separation processes [3], heterogenous catalysis [4], drug delivery [5], sensing [6] or energy storage [7]. The aim of this tutorial review is to explore and highlight key aspects of modern porous materials, with a particular focus on MOFs. Basic definitions and classification of this class of materials are provided, alongside an overview of its dynamic development in recent years. The structural composition of these materials is discussed in relation to the principles of reticular chemistry, including nomenclature and topological representations. The increasing complexity within this field and the evolution of MOFs is addressed through the introduction of their generations. The main part of this paper focuses on Zr-based MOFs, a distinctive group known for their unique stability and structural versatility, as well as the ability to endure various post-synthetic modifications. The broad spectrum of their applications, from controlled drug delivery to highly efficient heterogeneous catalysis, is presented to showcase the main achievements in this area. This review aims to highlight how advancements in MOF research are paving the way for new developments in material science, encouraging readers for further in-depth exploration of this compelling area of modern chemistry.

7

Adsorption of selected GHG on metal-organic frameworks in the context of accompanying thermal effects

Gajda Aleksandra, Jodłowski Przemysław, Kozieł Katarzyna, Kurowski Grzegorz, Hyjek Kornelia, Skoczylas Norbert, Pajdak Anna

Archives of Environmental Protection

|

2024

|

Vol. 50, no. 4

51--63

EN

Thermal effects accompanying gas sorption on micro- and mesoporous materials provide unique insights into the type, course, and efficiency of sorption. In this study, metal-organic frameworks (MOFs) with different topologies and chemical structures were synthesized and investigated: HKUST-1, Ni-MOF-74, UiO-66, and MIL-140A. These MOFs were characterized structurally and sorptively with respect to selected greenhouse gases (GHGs). Sorption capacities for CO2 and CH4 were determined at several temperatures and measurement pressures, and the maximum sorption capacity was determined using the Langmuir-Freundlich model. Thermal effects accompanying adsorption were quantified through the isosteric heat of adsorption parameter. For each MOF, the values of isosteric heat of adsorption were higher for CO2 than for CH4. The values of this parameter was determined in the following order: HKUST-1 > Ni-MOF-74 > UiO-66 > MIL-140A. Energy homogeneity of the adsorbent surface was observed in nearly all cases, except for UiO-66 during CO2 adsorption. Changes in the determined isosteric heat of adsorption of CO2 with increasing sorption capacity were in the range of 5-15 kJ/mol, while for CH4 they ranged from 1.4 to 17 kJ/mol, respectively. The level of thermal selectivity of CO2 over CH4 was determined in the following order: UiO-66 (1.9) > Ni-MOF-64 (1.7) > MIL-140A (1.5) > HKUST-1 (1.1).

PL

Efekty termiczne towarzyszące sorpcji gazu na materiałach mikro- i mezoporowatych dostarczają unikalnych spostrzeżeń na temat rodzaju, przebiegu i efektywności sorpcji. W niniejszym artykule zsyntetyzowano i zbadano związki metaloorganiczne (MOF) o skrajnie różnej topografii i budowie chemicznej: HKUST-1, Ni-MOF-74, UiO-66 i MIL-140A. MOFy te scharakteryzowano strukturalnie i sorpcyjnie względem wybranych GHG. Określono pojemności sorpcyjne względem CO2 i CH4 w kilku temperaturach i ciśnieniach pomiaru oraz określono maksymalną pojemność sorpcyjną zgodnie z modelem Langmuira-Freundlicha. Wyznaczono efekty cieplne towarzyszące adsorpcji poprzez parametr izosterycznego ciepła sorpcji. Dla każdego z MOFów wartości izosterycznego ciepła adsorpcji były wyższe względem CO2, niż względem CH4. Wartości tego parametru określono w następującej kolejności: HKUST-1 > Ni-MOF-74 > UiO-66 > MIL-140A. W prawie każdym przypadku zaobserwowano jednorodność energetyczną powierzchni adsorbentu, poza UiO-66 podczas adsorpcji CO2. Zmiany wyznaczonego izosterycznego ciepła sorpcji CO2 wraz ze wzrostem pojemności sorpcyjnej były w zakresie 5-15 kJ/mol, natomiast względem CH4 wyniosły odpowiednio 1.4-17 kJ/mol. Określono poziom selektywności cieplnej CO2 względem CH4. Najwyższą selektywność posiadały UiO-66 (1.9) oraz Ni-MOF-74 (1.7), natomiast najniższą MIL-140A (1.5) i HKUST-1 (1.1).

8

Metal-organic frameworks for efficient drug adsorption and delivery

Hyjek Kornelia, Jodłowski Przemysław

Scientiae Radices

|

2023

|

Vol. 2, Iss. 2

115-189

EN

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.

9

Badania syntezy i wykorzystania związków metaloorganicznych MOF, przegląd prac z udziałem Instytutu Mechaniki Górotworu PAN

Gajda Aleksandra, Pajdak Patrycja, Niekowal Paulina, Kurowski Grzegorz, Hyjek Kornelia, Jodłowski Przemysław

Prace Instytutu Mechaniki Górotworu PAN

|

2023

|

T. 25, nr 1-4

15--22

PL

W artykule zaprezentowano przegląd wybranych aktywności naukowych dotyczących związków metaloorganicznych MOF, w których uczestniczył Instytut Mechaniki Górotworu PAN we współpracy z innymi jednostkami naukowymi, w tym z Wydziałem Inżynierii i Technologii Chemicznej Politechniki Krakowskiej. Wspólnym pierwiastkiem wszystkich prac jest wykorzystanie związków MOF różnego typu do procesów transportu, magazynowania, wychwytu i usuwania wybranych związków chemicznych. Prace podejmują zagadnienia transportu pochodnych chlorochiny za pośrednictwem związków MOF do celowanych komórek w organizmie Danio rerio, zmniejszając tym samym kardiotoksyczność tej substancji. Inne prace poruszają problematykę skutecznego i bezpiecznego usuwania różnych toksyn z organizmu przy użyciu MOFów. Wykonano badania nad stworzeniem biobójczego kompozytu w oparciu o związki MOF, czy udoskonaleniem metody syntezy nowego typu MOF na bazie hafnu. W kontekście badań sorpcji w układzie ciało stałe – gaz, zbadano efektywność zastosowania MOFów jako systemów do magazynowania metanu.

EN

The article presents an overview of selected scientific activities concerning MOF metal-organic frameworks, in which the Strata Mechanics Research Institute of the Polish Academy of Sciences participated in cooperation with other scientific units, including the Faculty of Chemical Engineering and Technology, Cracow University of Technology. The common element in all the works is the use of MOF compounds of various types for the transport, storage, capture and removal processes of selected chemical compounds. The works address the issues of transport of chloroquine derivatives via MOF compounds to targeted cells in the body, thus reducing the cardiotoxicity of this substance. Other works address the issue of effective and safe removal of various toxins from the body using MOFs. Research has been carried out on the creation of a biocidal composite based on MOF compounds, or the improvement of a method for the synthesis of a new type of MOF based on hafnium. In the context of sorption studies in the solid-gas system, the effectiveness of using MOFs as methane storage systems was investigated.

10

Polimery koordynacyjne wanadu : stan obecny i perspektywy

Augustyniak Adam W.

Wiadomości Chemiczne

|

2021

|

[Z] 75, 3-4

253--269

EN

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.

11

Modelling of porous metal-organic framework (MOF) materials used in catalysis

Kurzydym Izabela, Czekaj Izabela

Technical Transactions

|

2020

|

Vol. 117, iss. 1

art. no. e2020012

EN

This paper presents a review of modern modelling of porous materials such as metal-organic frameworks used in catalysis. The authors’ own research approach using the nano-design of metal-organic frameworks is included in this review.

PL

W niniejszym artykule przedstawiamy przegląd nowoczesnego modelowania materiałów porowatych, takich jak struktury metaloorganiczne, stosowanych w katalizie. Uwzględnione zostały również nasze własne prace badawcze wykorzystujące projektowanie struktur metaloorganicznych.

12

Katalizatory palladowe immobilizowane w materiałach typu MOF aktywne w reakcjach uwodornienia

Augustyniak Adam W., Trzeciak Anna M.

Wiadomości Chemiczne

|

2019

|

[Z] 73, 3-4

221--241

EN

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.

13

Sieci metalo-organiczne jako multifunkcjonalne materiały przyszłości : mechanochemiczne podejście do syntezy

Jędrzejowski D.

Wiadomości Chemiczne

|

2018

|

[Z] 72, 9-10

645--666

EN

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.

14

Przewodnictwo protonowe w sieciach metalo-organicznych : nowe możliwości w technologii ogniw paliwowych

Szufla M.

Wiadomości Chemiczne

|

2018

|

[Z] 72, 3-4

147--163

EN

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.

15

An in Situ Crystal Growth of Metal Organic Frameworks-5 on Electrospun PVA Nanofibers

Talmoudi H., Khenoussi N., Adolphe D., Said A. H., Schacher L.

Autex Research Journal

|

2018

|

Vol. 18, no. 3

308--313

EN

In this study, a simple, general and straightforward method for growing metal-organic frameworks (MOFs) crystals directly on nanofibers is presented. A chelating polymer was first blent with metal cation and then electrospun. The obtained nanofibers were immersed in a linker solution. Metal cations were released and the metal-organic frameworks crystals were grown on the fibers’ surface. In this work, this method was tested with polyvinyl alcohol as chelating polymer, Zn2+ as metal cation and Terephthalic acid as linker. The pair cation/linker corresponds to the MOF-5. The latter is a robust metal organic framework formed from Zn4O nodes with 1,4-benzodicarboxylic acid struts between the nodes. SEM images revealed that the MOF-5 nanocrystals have grown along the PVA/Zn2+ nanofibers that served as the crystals’ growth template by providing the Zn2+ ions. This result was also confirmed by infrared spectroscopy, which indicates the presence of characteristic bands of MOF-5 in the modified nanofibers spectrum. Moreover, the X-ray diffraction showed that MOF-5 material was well crystallized on the nanofibers surface according to a cubic symmetry with a space group Fm-3m and a lattice constant a = 25.8849 Å.

16

Otrzymywanie i właściwości adsorpcyjne sieci metaloorganicznych

Szeligowska S., Choma J., Jaroniec M.

Wiadomości Chemiczne

|

2017

|

[Z] 71, 5-6

299--322

EN

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.

17

Kompozyty z materiałów węglowych i metalo-organicznych (MOF)

Bieniek A., Wiśniewski M., Terzyk A. P., Bolibok P., Dembek M.

Inżynieria i Ochrona Środowiska

|

2016

|

T. 19, nr 3

319--329

EN

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.

PL

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.

18

Homochiral metal-organic framework [Zn2(d-Cam)2(4,4′-bpy)]n for high-resolution gas chromatographic separations

Xue X. D, Zhang M., Xie S. M, Yuan L. M

Acta Chromatographica

|

2015

|

Vol. 27, no. 1

15--26

EN

The metal-organic framework (MOF) is a kind of new type self-assembly porous coordination polymer, which possesses many characteristics such as homologic hole, controllable size of cave, high specific surface area, and good chemical stability. In this study, a three-dimensional framework [Zn2(d-Cam)2(4,4′-bpy)]n with large homochiral channel and the orderly arrangement of left- and right-handed helices was used as chiral stationary phases (CSPs) in gas chromatography (GC). [Zn2(d-Cam)2 (4,4′-bpy)]n-coated open tubular column was prepared by a dynamic coating method for high-resolution GC. Some racemates, isomers, linear alkanes, and alcohols are used as the targets for separation. The column coating properties efficiency, polarity, and selectivity were studied. The experimental results show that the stationary phase has outstanding selectivity and also possesses good recognition ability toward these compounds.

19

Znaczenie mikroporowatych materiałów metaloorganicznych (MOF ) dla potrzeb magazynowania wodoru

Czub J., Gondek Ł, Figiel H.

Wiadomości Chemiczne

|

2012

|

[Z] 66, 3-4

227-247

EN

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.