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Lamač M, Urbán B, Horáček M, Bůžek D, Leonová L, Stýskalík A, Vykydalová A, Škoch K, Kloda M, Mahun A, Kobera L, Lang K, Londesborough MGS, Demel J. "Activated Borane": A Porous Borane Cluster Polymer as an Efficient Lewis Acid-Based Catalyst. ACS Catal 2023; 13:14614-14626. [PMID: 38026813 PMCID: PMC10660343 DOI: 10.1021/acscatal.3c04011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Revised: 10/14/2023] [Accepted: 10/16/2023] [Indexed: 12/01/2023]
Abstract
Borane cluster-based porous covalent networks, named activated borane (ActB), were prepared by cothermolysis of decaborane(14) (nido-B10H14) and selected hydrocarbons (toluene, ActB-Tol; cyclohexane, ActB-cyHx; and n-hexane, ActB-nHx) under anaerobic conditions. These amorphous solid powders exhibit different textural and Lewis acid (LA) properties that vary depending on the nature of the constituent organic linker. For ActB-Tol, its LA strength even approaches that of the commonly used molecular LA, B(C6F5)3. Most notably, ActBs can act as heterogeneous LA catalysts in hydrosilylation/deoxygenation reactions with various carbonyl substrates as well as in the gas-phase dehydration of ethanol. These studies reveal the potential of ActBs in catalytic applications, showing (a) the possibility for tuning catalytic reaction outcomes (selectivity) in hydrosilylation/deoxygenation reactions by changing the material's composition and (b) the very high activity toward ethanol dehydration that exceeds the commonly used γ-Al2O3 by achieving a stable conversion of ∼93% with a selectivity for ethylene production of ∼78% during a 17 h continuous period on stream at 240 °C.
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Affiliation(s)
- Martin Lamač
- Department
of Molecular Electrochemistry and Catalysis, J. Heyrovsky Institute of Physical Chemistry of the Czech Academy
of Sciences Dolejškova 2155, 182 00 Prague 8, Czech Republic
| | - Béla Urbán
- Department
of Molecular Electrochemistry and Catalysis, J. Heyrovsky Institute of Physical Chemistry of the Czech Academy
of Sciences Dolejškova 2155, 182 00 Prague 8, Czech Republic
| | - Michal Horáček
- Department
of Molecular Electrochemistry and Catalysis, J. Heyrovsky Institute of Physical Chemistry of the Czech Academy
of Sciences Dolejškova 2155, 182 00 Prague 8, Czech Republic
| | - Daniel Bůžek
- Department
of Materials Chemistry, Institute of Inorganic
Chemistry of the Czech Academy of Sciences, Husinec-Řež 1001, 250 68 Řež, Czech Republic
| | - Lucie Leonová
- Department
of Chemistry, Masaryk University, Kotlářská 2, 611 37 Brno, Czech Republic
| | - Aleš Stýskalík
- Department
of Chemistry, Masaryk University, Kotlářská 2, 611 37 Brno, Czech Republic
| | - Anna Vykydalová
- Department
of Materials Chemistry, Institute of Inorganic
Chemistry of the Czech Academy of Sciences, Husinec-Řež 1001, 250 68 Řež, Czech Republic
| | - Karel Škoch
- Department
of Materials Chemistry, Institute of Inorganic
Chemistry of the Czech Academy of Sciences, Husinec-Řež 1001, 250 68 Řež, Czech Republic
| | - Matouš Kloda
- Department
of Materials Chemistry, Institute of Inorganic
Chemistry of the Czech Academy of Sciences, Husinec-Řež 1001, 250 68 Řež, Czech Republic
| | - Andrii Mahun
- Department
of Structural Analysis, Institute of Macromolecular
Chemistry of the Czech Academy of Sciences, Heyrovského nám. 2, 162 06 Prague 6, Czech Republic
| | - Libor Kobera
- Department
of Structural Analysis, Institute of Macromolecular
Chemistry of the Czech Academy of Sciences, Heyrovského nám. 2, 162 06 Prague 6, Czech Republic
| | - Kamil Lang
- Department
of Materials Chemistry, Institute of Inorganic
Chemistry of the Czech Academy of Sciences, Husinec-Řež 1001, 250 68 Řež, Czech Republic
| | - Michael G. S. Londesborough
- Department
of Materials Chemistry, Institute of Inorganic
Chemistry of the Czech Academy of Sciences, Husinec-Řež 1001, 250 68 Řež, Czech Republic
| | - Jan Demel
- Department
of Materials Chemistry, Institute of Inorganic
Chemistry of the Czech Academy of Sciences, Husinec-Řež 1001, 250 68 Řež, Czech Republic
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2
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Ondrušová S, Bůžek D, Kloda M, Rohlíček J, Adamec S, Pospíšil M, Janoš P, Demel J, Hynek J. Linker-Functionalized Phosphinate Metal-Organic Frameworks: Adsorbents for the Removal of Emerging Pollutants. Inorg Chem 2023; 62:15479-15489. [PMID: 37682020 PMCID: PMC10523435 DOI: 10.1021/acs.inorgchem.3c01810] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Indexed: 09/09/2023]
Abstract
Metal-organic frameworks (MOFs) are attracting increasing attention as adsorbents of contaminants of emerging concern that are difficult to remove by conventional processes. This paper examines how functional groups covering the pore walls of phosphinate-based MOFs affect the adsorption of specific pharmaceutical pollutants (diclofenac, cephalexin, and sulfamethoxazole) and their hydrolytic stability. New structures, isoreticular to the phosphinate MOF ICR-7, are presented. The phenyl ring facing the pore wall of the presented MOFs is modified with dimethylamino groups (ICR-8) and ethyl carboxylate groups (ICR-14). These functionalized MOFs were obtained from two newly synthesized phosphinate linkers containing the respective functional groups. The presence of additional functional groups resulted in higher affinity toward the tested pollutants compared to ICR-7 or activated carbon. However, this modification also comes with a reduced adsorption capacity. Importantly, the introduction of the functional groups enhanced the hydrolytic stability of the MOFs.
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Affiliation(s)
- Soňa Ondrušová
- Institute
of Inorganic Chemistry of the Czech Academy of Sciences, Husinec-Řež 1001, Řež 250 68, Czech Republic
- Department
of Inorganic Chemistry, Faculty of Science, Charles University, Hlavova 2030, Prague 128
40, Czech Republic
| | - Daniel Bůžek
- Institute
of Inorganic Chemistry of the Czech Academy of Sciences, Husinec-Řež 1001, Řež 250 68, Czech Republic
- Department
of Environmental Chemistry and Technology, Faculty of Environment, Jan Evangelista Purkyně University in Ústí
nad Labem, Pasteurova
3632/15, Ústí nad Labem 400 96, Czech Republic
| | - Matouš Kloda
- Institute
of Inorganic Chemistry of the Czech Academy of Sciences, Husinec-Řež 1001, Řež 250 68, Czech Republic
| | - Jan Rohlíček
- Institute
of Physics of the Czech Academy of Sciences, Na Slovance 1999/2, Prague 182 21, Czech Republic
| | - Slavomír Adamec
- Department
of Environmental Chemistry and Technology, Faculty of Environment, Jan Evangelista Purkyně University in Ústí
nad Labem, Pasteurova
3632/15, Ústí nad Labem 400 96, Czech Republic
| | - Miroslav Pospíšil
- Department
of Chemical Physics and Optics, Faculty of Mathematics and Physics, Charles University, Ke Karlovu 3, Prague 121
16, Czech Republic
| | - Pavel Janoš
- Department
of Environmental Chemistry and Technology, Faculty of Environment, Jan Evangelista Purkyně University in Ústí
nad Labem, Pasteurova
3632/15, Ústí nad Labem 400 96, Czech Republic
| | - Jan Demel
- Institute
of Inorganic Chemistry of the Czech Academy of Sciences, Husinec-Řež 1001, Řež 250 68, Czech Republic
| | - Jan Hynek
- Institute
of Inorganic Chemistry of the Czech Academy of Sciences, Husinec-Řež 1001, Řež 250 68, Czech Republic
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Abodunrin TO, Kloda M, Demel J, Taddei M. Water-based synthesis and nitrate release properties of a Zr IV-based metal-organic framework derived from L-aspartic acid. Dalton Trans 2023; 52:5865-5869. [PMID: 37102679 DOI: 10.1039/d3dt00380a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/28/2023]
Abstract
We report the synthesis and characterisation of a cationic metal-organic framework (MOF) based on ZrIV and L-aspartate and containing nitrate as an extra framework counteranion, named MIP-202-NO3. The ion exchange properties of MIP-202-NO3 were preliminarily investigated to evaluate its potential as a platform for controlled release of nitrate, finding that it readily releases nitrate in aqueous solution.
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Affiliation(s)
- Temitope Olabisi Abodunrin
- Department of Physical Sciences, College of Pure and Applied Sciences, Landmark University, P.M.B. 1001, Omu-aran, Kwara State, Nigeria
- Dipartimento di Chimica e Chimica Industriale, Unità di Ricerca INSTM, Università di Pisa, Via Giuseppe Moruzzi 13, 56124 Pisa, Italy.
| | - Matouŝ Kloda
- Institute of Inorganic Chemistry of the Czech Academy of Sciences, Husinec-Řež-1001, 250 68 Řež, Czech Republic
| | - Jan Demel
- Institute of Inorganic Chemistry of the Czech Academy of Sciences, Husinec-Řež-1001, 250 68 Řež, Czech Republic
| | - Marco Taddei
- Dipartimento di Chimica e Chimica Industriale, Unità di Ricerca INSTM, Università di Pisa, Via Giuseppe Moruzzi 13, 56124 Pisa, Italy.
- Centro per l'Integrazione della Strumentazione Scientifica dell'Università di Pisa (CISUP), Pisa, Italy
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Demel J, Planka L, Stichhauer R, Vrtkova A, Bajor G, Havlicek M, Pleva L. 5th Metatarsal Jones Fracture - To Treat Conservatively, or Surgically Using Headless Double-Threaded Herbert Screw? Acta Chir Orthop Traumatol Cech 2023; 90:53-58. [PMID: 36907584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 03/14/2023]
Abstract
PURPOSE OF THE STUDY Fifth metatarsal fractures, in particular so-called Jones fractures, are relatively common injuries both in the general population and athletes. Although discussions about whether the surgical or conservative solution should be preferred are ongoing for decades, there is no clear consensus. Here, we aimed to prospectively compare the results of osteosynthesis using the Herbert screw with the conservative solution in patients from our department. MATERIAL AND METHODS Patients 18-50 years presenting to our department with Jones fracture and meeting further inclusion/exclusion criteria were offered participation in the study. Those willing to participate signed informed consent and were randomized by flipping the coin into surgically and conservatively treated groups. After six and twelve weeks, X-ray was performed in each patient and AOFAS score was determined. Conservatively treated patients who showed no signs of healing and whose AOFAS was below 80 after six weeks were offered surgery again. RESULTS Of 24 patients in total, 15 were assigned to the surgically treated group and nine were treated conservatively. After six weeks, AOFAS score of all but two patients (86%) in the surgically treated group ranged between 97 and 100, while this score exceeded 90 points only in three patients (33%) from the conservatively treated group. On X-ray, successful healing after six weeks was observed in seven patients (47%) from the surgically treated group but in none of the patients from the conservatively treated group. Three out of five patients in the conservative group whose AOFAS was below 80 after six weeks opted for surgery at that time and all improved significantly by the twelfth week. DISCUSSION Although studies on surgical treatment of Jones fracture using various screws or plates are not rare, we present an uncommon method of surgical treatment of this injury - the use of the Herbert screw. The results of this method are excellent and even on a relatively small sample yielded statistically significantly better results than conservative treatment. Moreover, the surgical treatment facilitated early loading of the injured limb, which allows an earlier return of the patients to normal life. CONCLUSIONS Osteosynthesis using Herbert screw in Jones fracture yielded significantly better results than conservative treatment. Key words: Jones fracture, AOFAS, Herbert screw, 5th metatarsal fracture, surgical treatment.
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Affiliation(s)
- J Demel
- Department of Trauma Surgery, University Hospital Ostrava, Czech Republic
- Department of Disaster Medicine, Faculty of Medicine, University of Ostrava, Czech Republic
- Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - L Planka
- Department of Pediatric Surgery, Orthopedics and Trauma Surgery, University Hospital Brno Czech Republic
| | - R Stichhauer
- Department of Pediatric Surgery and Trauma Surgery, University Hospital Hradec Králové Czech Republic
| | - A Vrtkova
- Department of Applied Mathematics, Faculty of Electrical Engineering and Computer Science, VSB - Technical University of Ostrava, Ostrava, Czech Republic
- University Hospital Ostrava, Department of the Deputy Director for Science, Research and Education, Ostrava, Czech Republic
| | - G Bajor
- Department of Human Anatomy, Faculty of Medical Science in Katowice, Medical University in Katowice, Katowice, Poland
- Department of Anatomy, Faculty of Medicine, University of Ostrava, Czech Republic
| | - M Havlicek
- MEDIN, a.s., Nové Město na Moravě, Czech Republic
| | - L Pleva
- Department of Trauma Surgery, University Hospital Ostrava, Czech Republic
- Department of Disaster Medicine, Faculty of Medicine, University of Ostrava, Czech Republic
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5
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Ondrušová S, Kloda M, Rohlíček J, Taddei M, Zaręba JK, Demel J. Exploring the Isoreticular Continuum between Phosphonate- and Phosphinate-Based Metal–Organic Frameworks. Inorg Chem 2022; 61:18990-18997. [DOI: 10.1021/acs.inorgchem.2c03271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Soňa Ondrušová
- Institute of Inorganic Chemistry of the Czech Academy of Sciences, 250 68 Řež, Czech Republic
- Faculty of Science Charles University, 128 00 Praha 2, Czech Republic
| | - Matouš Kloda
- Institute of Inorganic Chemistry of the Czech Academy of Sciences, 250 68 Řež, Czech Republic
| | - Jan Rohlíček
- Department of Structure Analysis, Institute of Physics, Czech Academy of Sciences, Prague 18221, Czech Republic
| | - Marco Taddei
- Department of Chemistry and Industrial Chemistry, University of Pisa, Via Giuseppe Moruzzi, 13, Pisa 56124, Italy
| | - Jan K. Zaręba
- Institute of Advanced Materials, Wrocław University of Science and Technology, Wybrzeże, Wyspiańskiego 27, Wrocław 50-370, Poland
| | - Jan Demel
- Institute of Inorganic Chemistry of the Czech Academy of Sciences, 250 68 Řež, Czech Republic
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6
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Bůžek D, Škoch K, Ondrušová S, Kloda M, Bavol D, Mahun A, Kobera L, Lang K, Londesborough MGS, Demel J. “Activated Borane” – A Porous Borane Cluster Network as an Effective Adsorbent for Removing Organic Pollutants. Chemistry 2022; 28:e202201885. [DOI: 10.1002/chem.202201885] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2022] [Indexed: 11/05/2022]
Affiliation(s)
- Daniel Bůžek
- Institute of Inorganic Chemistry Czech Academy of Sciences: Ustav anorganicke chemie Akademie ved Ceske republiky Department of Materials Chemistry CZECH REPUBLIC
| | - Karel Škoch
- Institute of Inorganic Chemistry Czech Academy of Sciences: Ustav anorganicke chemie Akademie ved Ceske republiky Department of Materials Chemistry CZECH REPUBLIC
| | - Soňa Ondrušová
- Institute of Inorganic Chemistry Czech Academy of Sciences: Ustav anorganicke chemie Akademie ved Ceske republiky Department of Materials Chemistry CZECH REPUBLIC
| | - Matouš Kloda
- Institute of Inorganic Chemistry Czech Academy of Sciences: Ustav anorganicke chemie Akademie ved Ceske republiky Department of Materials Chemistry CZECH REPUBLIC
| | - Dmytro Bavol
- Institute of Inorganic Chemistry Czech Academy of Sciences: Ustav anorganicke chemie Akademie ved Ceske republiky Department of Synthesis CZECH REPUBLIC
| | - Andrii Mahun
- Institute of Macromolecular Chemistry Czech Academy of Sciences: Ustav makromolekularni chemie Akademie ved Ceske republiky Department of NMR Spectroscopy & X-ray and neutron diffraction CZECH REPUBLIC
| | - Libor Kobera
- Institute of Macromolecular Chemistry Czech Academy of Sciences: Ustav makromolekularni chemie Akademie ved Ceske republiky Department of NMR Spectroscopy & X-ray and neutron diffraction CZECH REPUBLIC
| | - Kamil Lang
- Institute of Inorganic Chemistry Czech Academy of Sciences: Ustav anorganicke chemie Akademie ved Ceske republiky Department of Materials Chemistry CZECH REPUBLIC
| | - Michael G. S. Londesborough
- Institute of Inorganic Chemistry Czech Academy of Sciences: Ustav anorganicke chemie Akademie ved Ceske republiky Department of Synthesis CZECH REPUBLIC
| | - Jan Demel
- Institute of Inorganic Chemistry Czech Academy of Sciences: Ustav anorganicke chemie Akademie ved Ceske republiky Department of Materials Chemistry Husinec-Rez 1001 250 68 Rez CZECH REPUBLIC
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Brazda P, Kloda M, Hynek J, Demel J. Structural variability of MOFs built from a tetratopic phosphinate ligand. Acta Cryst Sect A 2022. [DOI: 10.1107/s2053273322090751] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/19/2023]
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8
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Demel J, Kloda M, Lang K, Škoch K, Hynek J, Opravil A, Novotný M, Bould J, Ehn M, Londesborough MGS. Direct Phenylation of nido-B 10H 14. J Org Chem 2022; 87:10034-10043. [PMID: 35839127 DOI: 10.1021/acs.joc.2c00997] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
As a preliminary step toward its condensation into the porous polymer Activated Borane, the thermolysis of nido-B10H14 (1) in benzene at 200 °C results in the generation of a number of phenylated borane molecular species. The principal product is the new monophenylated compound 5-Ph-nido-B10H13 (2), isolated in 48% yield (based on consumption of 1) and structurally characterized by single-crystal X-ray diffraction analysis, NMR, and mass spectrometry along with other minor products, such as 6-Ph-nido-B10H13 (3), for which we observe UV-light-driven conversion into 2 via a "vertex-flip" mechanism, and novel diphenylated 5,8-Ph2-nido-B10H12 (4). Together, the phenylated derivatives provide a valuable insight into the assembly of Activated Borane and ultimately inform on its structure. The new compounds also display strong blue fluorescence in both solid-state and in solution and are the first examples of the direct phenylation of nido-B10H14, thus opening the door to the straight-forward synthesis of highly luminescent organic-borane hybrid systems.
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Affiliation(s)
- Jan Demel
- Institute of Inorganic Chemistry of the Czech Academy of Sciences 250 68, Husinec-Řež č.p. 1001, Czech Republic
| | - Matouš Kloda
- Institute of Inorganic Chemistry of the Czech Academy of Sciences 250 68, Husinec-Řež č.p. 1001, Czech Republic
| | - Kamil Lang
- Institute of Inorganic Chemistry of the Czech Academy of Sciences 250 68, Husinec-Řež č.p. 1001, Czech Republic
| | - Karel Škoch
- Institute of Inorganic Chemistry of the Czech Academy of Sciences 250 68, Husinec-Řež č.p. 1001, Czech Republic
| | - Jan Hynek
- Institute of Inorganic Chemistry of the Czech Academy of Sciences 250 68, Husinec-Řež č.p. 1001, Czech Republic
| | - Adam Opravil
- Institute of Inorganic Chemistry of the Czech Academy of Sciences 250 68, Husinec-Řež č.p. 1001, Czech Republic
| | - Matyáš Novotný
- Institute of Inorganic Chemistry of the Czech Academy of Sciences 250 68, Husinec-Řež č.p. 1001, Czech Republic
| | - Jonathan Bould
- Institute of Inorganic Chemistry of the Czech Academy of Sciences 250 68, Husinec-Řež č.p. 1001, Czech Republic
| | - Marcel Ehn
- Institute of Inorganic Chemistry of the Czech Academy of Sciences 250 68, Husinec-Řež č.p. 1001, Czech Republic
| | - Michael G S Londesborough
- Institute of Inorganic Chemistry of the Czech Academy of Sciences 250 68, Husinec-Řež č.p. 1001, Czech Republic
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Kloda M, Plecháček T, Ondrušová S, Brázda P, Chalupský P, Rohlíček J, Demel J, Hynek J. Phosphinate MOFs Formed from Tetratopic Ligands as Proton-Conductive Materials. Inorg Chem 2022; 61:7506-7512. [PMID: 35512292 DOI: 10.1021/acs.inorgchem.2c00194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Metal-organic frameworks (MOFs) are attracting attention as potential proton conductors. There are two main advantages of MOFs in this application: the possibility of rational design and tuning of the properties and clear conduction pathways given by their crystalline structure. We hereby present two new MOF structures, ICR-10 and ICR-11, based on tetratopic phosphinate ligands. The structures of both MOFs were determined by 3D electron diffraction. They both crystallize in the P3̅ space group and contain arrays of parallel linear pores lined with hydrophilic noncoordinated phosphinate groups. This, together with the adsorbed water molecules, facilitates proton transfer via the Grotthuss mechanism, leading to a proton conductivity of up to 4.26 × 10-4 S cm-1 for ICR-11. The presented study demonstrates the high potential of phosphinate MOFs for the fabrication of proton conductors.
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Affiliation(s)
- Matouš Kloda
- Institute of Inorganic Chemistry of the Czech Academy of Sciences, Husinec-Řež 1001, 250 68 Husinec-Řež, Czech Republic
| | - Tomáš Plecháček
- Faculty of Chemical Technology, University of Pardubice, Studentská 573, 532 10 Pardubice, Czech Republic
| | - Soňa Ondrušová
- Institute of Inorganic Chemistry of the Czech Academy of Sciences, Husinec-Řež 1001, 250 68 Husinec-Řež, Czech Republic
| | - Petr Brázda
- Institute of Physics of the Czech Academy of Sciences, Na Slovance 1999/2, 182 21 Praha, Czech Republic
| | - Petr Chalupský
- Institute of Inorganic Chemistry of the Czech Academy of Sciences, Husinec-Řež 1001, 250 68 Husinec-Řež, Czech Republic
| | - Jan Rohlíček
- Institute of Physics of the Czech Academy of Sciences, Na Slovance 1999/2, 182 21 Praha, Czech Republic
| | - Jan Demel
- Institute of Inorganic Chemistry of the Czech Academy of Sciences, Husinec-Řež 1001, 250 68 Husinec-Řež, Czech Republic
| | - Jan Hynek
- Institute of Inorganic Chemistry of the Czech Academy of Sciences, Husinec-Řež 1001, 250 68 Husinec-Řež, Czech Republic
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10
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11
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Abstract
The combination of zirconium-based MOF UiO-66 with buffered environment leads to UiO-66 decomposition.
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Affiliation(s)
- Daniel Bůžek
- Institute of Inorganic Chemistry of the Czech Academy of Sciences
- 250 68 Husinec-Řež
- Czech Republic
- Faculty of Environment
- Jan Evangelista Purkyně University
| | - Slavomír Adamec
- Faculty of Environment
- Jan Evangelista Purkyně University
- 400 96 Ústí nad Labem
- Czech Republic
| | - Kamil Lang
- Institute of Inorganic Chemistry of the Czech Academy of Sciences
- 250 68 Husinec-Řež
- Czech Republic
| | - Jan Demel
- Institute of Inorganic Chemistry of the Czech Academy of Sciences
- 250 68 Husinec-Řež
- Czech Republic
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12
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Bůžek D, Ondrušová S, Hynek J, Kovář P, Lang K, Rohlíček J, Demel J. Robust Aluminum and Iron Phosphinate Metal-Organic Frameworks for Efficient Removal of Bisphenol A. Inorg Chem 2020; 59:5538-5545. [PMID: 32275140 DOI: 10.1021/acs.inorgchem.0c00201] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Porous metal-organic frameworks (MOFs) have excellent characteristics for the adsorptive removal of environmental pollutants. Herein, we introduce a new series of highly stable MOFs constructed using Fe3+ and Al3+ metal ions and bisphosphinate linkers. The isoreticular design leads to ICR-2, ICR-6, and ICR-7 MOFs with a honeycomb arrangement of linear pores, surface areas up to 1360 m2 g-1, and high solvothermal stabilities. In most cases, their sorption capacity is retained even after 24 h of reflux in water. The choice of the linkers allows for fine-tuning of the pore sizes and the chemical nature of the pores. This feature can be utilized for the optimization of host-guest interactions between molecules and the pore walls. Water pollution by various endocrine disrupting chemicals has been considered a global threat to public health. In this work, we prove that the chemical stability and hydrophobic nature of the synthesized series of MOFs result in the remarkable sorption properties of these materials for endocrine disruptor bisphenol A.
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Affiliation(s)
- Daniel Bůžek
- Institute of Inorganic Chemistry of the Czech Academy of Sciences, 250 68 Husinec-Řež, Czech Republic.,Faculty of Environment, Jan Evangelista Purkyně University, Králova Výšina 3132/7, 400 96 Ústí nad Labem, Czech Republic
| | - Soňa Ondrušová
- Institute of Inorganic Chemistry of the Czech Academy of Sciences, 250 68 Husinec-Řež, Czech Republic
| | - Jan Hynek
- Institute of Inorganic Chemistry of the Czech Academy of Sciences, 250 68 Husinec-Řež, Czech Republic
| | - Petr Kovář
- Charles University, Faculty of Mathematics and Physics, Ke Karlovu 3, 121 16 Praha 2, Czech Republic
| | - Kamil Lang
- Institute of Inorganic Chemistry of the Czech Academy of Sciences, 250 68 Husinec-Řež, Czech Republic
| | - Jan Rohlíček
- Institute of Physics of the Czech Academy of Sciences, 182 21 Praha, Czech Republic
| | - Jan Demel
- Institute of Inorganic Chemistry of the Czech Academy of Sciences, 250 68 Husinec-Řež, Czech Republic
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13
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Vinu M, Sivasankar K, Prabu S, Han JL, Lin CH, Yang CC, Demel J. Tetrazine-Based Metal-Organic Frameworks as Scaffolds for Post-Synthetic Modification by the Click Reaction. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.201901230] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Madhan Vinu
- Department of Materials Science; Institute of Inorganic Chemistry of the Czech Academy of Sciences; v.v.i. Husinec-Řež 1001 25068 Řež Czech Republic
- Department of Chemistry; Karunya Institute of Technology and Sciences (Deemed-to-be University); 641 114 Coimbatore India
- Department of Chemistry; Chung-Yuan Christian University; 32023 Taoyuan City Taiwan
| | | | - Samikannu Prabu
- Department of Chemistry; Chung-Yuan Christian University; 32023 Taoyuan City Taiwan
| | - Jeng-Liang Han
- Department of Chemistry; Chung-Yuan Christian University; 32023 Taoyuan City Taiwan
| | - Chia-Her Lin
- Department of Chemistry; Chung-Yuan Christian University; 32023 Taoyuan City Taiwan
| | - Chun-Chuen Yang
- Department of Physics; Chung-Yuan Christian University; 32023 Taoyuan City Taiwan
| | - Jan Demel
- Department of Materials Science; Institute of Inorganic Chemistry of the Czech Academy of Sciences; v.v.i. Husinec-Řež 1001 25068 Řež Czech Republic
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14
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Kirakci K, Demel J, Hynek J, Zelenka J, Rumlová M, Ruml T, Lang K. Phosphinate Apical Ligands: A Route to a Water-Stable Octahedral Molybdenum Cluster Complex. Inorg Chem 2019; 58:16546-16552. [PMID: 31794199 DOI: 10.1021/acs.inorgchem.9b02569] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Recent studies have unraveled the potential of octahedral molybdenum cluster complexes (Mo6) as relevant red phosphors and photosensitizers of singlet oxygen, O2(1Δg), for photobiological applications. However, these complexes tend to hydrolyze in an aqueous environment, which deteriorates their properties and limits their applications. To address this issue, we show that phenylphosphinates are extraordinary apical ligands for the construction of Mo6 complexes. These new complexes display unmatched luminescence quantum yields and singlet oxygen production in aqueous solutions. More importantly, the complex with diphenylphosphinate ligands is the only stable complex of these types in aqueous media. These complexes internalize in lysosomes of HeLa cells, have no dark toxicity, and yet are phototoxic in the submicromolar concentration range. The superior hydrolytic stability of the diphenylphosphinate complex allows for conservation of its photophysical properties and biological activity over a long period, making it a promising compound for photobiological applications.
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Affiliation(s)
- Kaplan Kirakci
- Institute of Inorganic Chemistry of the Czech Academy of Sciences , Řež 1001 , 250 68 Husinec-Řež , Czech Republic
| | - Jan Demel
- Institute of Inorganic Chemistry of the Czech Academy of Sciences , Řež 1001 , 250 68 Husinec-Řež , Czech Republic
| | - Jan Hynek
- Institute of Inorganic Chemistry of the Czech Academy of Sciences , Řež 1001 , 250 68 Husinec-Řež , Czech Republic
| | | | | | | | - Kamil Lang
- Institute of Inorganic Chemistry of the Czech Academy of Sciences , Řež 1001 , 250 68 Husinec-Řež , Czech Republic
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15
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Hynek J, Koncošová M, Zelenka J, KříŽová I, Ruml T, Kubát P, Demel J, Lang K. Phosphinatophenylporphyrins tailored for high photodynamic efficacy. Org Biomol Chem 2019; 16:7274-7281. [PMID: 30259016 DOI: 10.1039/c8ob01984c] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The development of effective photosensitizers is particularly attractive for photodynamic therapy of cancer. Three novel porphyrin photosensitizers functionalized with phosphinic groups were synthesized and their physicochemical, photophysical, and photobiological properties were collected. Phosphinic acid groups (R1R2POOH) attached to the porphyrin moiety (R1) contain different R2 substituents (methyl, isopropyl, phenyl in this study). The presence of phosphinic groups does not influence absorption and photophysical properties of the porphyrin units, including the O2(1Δg) productivity. In vitro studies show that these porphyrins accumulate in cancer cells, are inherently nontoxic, however, exhibit high phototoxicity upon irradiation with visible light with their phototoxic efficacy tuned by R2 substituents on the phosphorus centre. Thus, phosphinatophenylporphyrin with isopropyl substituents has the strongest photodynamic efficacy due to the most efficient cellular uptake. We demonstrate that these porphyrins are attractive candidates for photodynamic applications since their photodynamic efficacy can be easily tuned by the R2 substituent.
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Affiliation(s)
- Jan Hynek
- Institute of Inorganic Chemistry of the Czech Academy of Sciences, 250 68 ŘeŽ, Czech Republic.
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16
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Hynek J, Jurík S, Koncošová M, Zelenka J, Křížová I, Ruml T, Kirakci K, Jakubec I, Kovanda F, Lang K, Demel J. The nanoscaled metal-organic framework ICR-2 as a carrier of porphyrins for photodynamic therapy. Beilstein J Nanotechnol 2018; 9:2960-2967. [PMID: 30546993 PMCID: PMC6278752 DOI: 10.3762/bjnano.9.275] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Accepted: 11/06/2018] [Indexed: 06/09/2023]
Abstract
Nanosized porphyrin-containing metal-organic frameworks (MOFs) attract considerable attention as solid-state photosensitizers for biological applications. In this study, we have for the first time synthesised and characterised phosphinate-based MOF nanoparticles, nanoICR-2 (Inorganic Chemistry Rez). We demonstrate that nanoICR-2 can be decorated with anionic 5,10,15,20-tetrakis(4-R-phosphinatophenyl)porphyrins (R = methyl, isopropyl, phenyl) by utilizing unsaturated metal sites on the nanoparticle surface. The use of these porphyrins allows for superior loading of the nanoparticles when compared with commonly used 5,10,15,20-tetrakis(4-carboxyphenyl)porphyrin. The nanoICR-2/porphyrin composites retain part of the free porphyrins photophysical properties, while the photodynamic efficacy is strongly affected by the R substituent at the porphyrin phosphinate groups. Thus, phosphinatophenylporphyrin with phenyl substituents has the strongest photodynamic efficacy due to the most efficient cellular uptake.
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Affiliation(s)
- Jan Hynek
- Department of Materials Chemistry, Institute of Inorganic Chemistry of the Czech Academy of Sciences, Husinec-Řež 1001, 250 68 Řež, Czech Republic
| | - Sebastian Jurík
- Department of Solid State Chemistry, University of Chemistry and Technology, Technická 5, 166 28 Prague, Czech Republic
| | - Martina Koncošová
- Department of Biochemistry and Microbiology, University of Chemistry and Technology, Technická 5, 166 28 Prague, Czech Republic
| | - Jaroslav Zelenka
- Department of Biochemistry and Microbiology, University of Chemistry and Technology, Technická 5, 166 28 Prague, Czech Republic
| | - Ivana Křížová
- Department of Biotechnology, University of Chemistry and Technology, Technická 5, 166 28 Prague, Czech Republic
| | - Tomáš Ruml
- Department of Biochemistry and Microbiology, University of Chemistry and Technology, Technická 5, 166 28 Prague, Czech Republic
| | - Kaplan Kirakci
- Department of Materials Chemistry, Institute of Inorganic Chemistry of the Czech Academy of Sciences, Husinec-Řež 1001, 250 68 Řež, Czech Republic
| | - Ivo Jakubec
- Department of Materials Chemistry, Institute of Inorganic Chemistry of the Czech Academy of Sciences, Husinec-Řež 1001, 250 68 Řež, Czech Republic
| | - František Kovanda
- Department of Solid State Chemistry, University of Chemistry and Technology, Technická 5, 166 28 Prague, Czech Republic
| | - Kamil Lang
- Department of Materials Chemistry, Institute of Inorganic Chemistry of the Czech Academy of Sciences, Husinec-Řež 1001, 250 68 Řež, Czech Republic
| | - Jan Demel
- Department of Materials Chemistry, Institute of Inorganic Chemistry of the Czech Academy of Sciences, Husinec-Řež 1001, 250 68 Řež, Czech Republic
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17
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Bůžek D, Demel J, Lang K. Zirconium Metal-Organic Framework UiO-66: Stability in an Aqueous Environment and Its Relevance for Organophosphate Degradation. Inorg Chem 2018; 57:14290-14297. [PMID: 30371080 DOI: 10.1021/acs.inorgchem.8b02360] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Zirconium-based metal-organic frameworks were recently investigated as catalysts for degradation of organophosphate toxic compounds, such as pesticides or chemical warfare agents. The most utilized UiO-66 is considered as a stable material for these applications in an aqueous environment. However, the presented results indicate that the properties of UiO-66 are changing considerably in aqueous media under common conditions used for organophosphate degradations, and therefore its catalytic activity is not related to the number of structural defects created during the material synthesis. We delineate the stability of UiO-66 in water of various pHs, the in situ formation of new catalytic sites, and the correlation of these two parameters with the degradation rate of a model organophosphate pollutant, dimethyl-4-nitrophenyl phosphate (methyl-paraoxon). The stability was quantified using high-performance liquid chromatography (HPLC) by measuring the amounts of leached terephthalic acid, the linker of UiO-66, and monocarboxylic acids, the modulators bound at UiO-66 defects. We demonstrate that the HPLC analysis is a more suitable method for metal-organic frameworks stability assessment than commonly used methods, e.g., powder X-ray diffraction, adsorption isotherms, or electron microscopy.
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Affiliation(s)
- Daniel Bůžek
- Institute of Inorganic Chemistry of the Czech Academy of Sciences , 250 68 Řež , Czech Republic.,Faculty of the Environment , Jan Evangelista Purkyně University , Králova Výšina 3132/7 , 400 96 Ústí nad Labem , Czech Republic
| | - Jan Demel
- Institute of Inorganic Chemistry of the Czech Academy of Sciences , 250 68 Řež , Czech Republic
| | - Kamil Lang
- Institute of Inorganic Chemistry of the Czech Academy of Sciences , 250 68 Řež , Czech Republic
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18
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Hynek J, Brázda P, Rohlíček J, Londesborough MGS, Demel J. Phosphinic Acid Based Linkers: Building Blocks in Metal-Organic Framework Chemistry. Angew Chem Int Ed Engl 2018; 57:5016-5019. [PMID: 29451728 DOI: 10.1002/anie.201800884] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Indexed: 11/07/2022]
Abstract
Metal-organic frameworks (MOFs) are a chemically and topologically diverse family of materials composed of inorganic nodes and organic linkers bound together by coordination bonds. Presented here are two significant innovations in this field. The first is the use of a new coordination group, phenylene-1,4-bis(methylphosphinic acid) (PBPA), a phosphinic acid analogue of the commonly used terephtalic acid. Use of this new linker group leads to the formation of a hydrothermally stable and permanently porous MOF structure. The second innovation is the application of electron-diffraction tomography, coupled with dynamic refinement of the EDT data, to the elucidation of the structure of the new material, including the localization of hydrogen atoms.
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Affiliation(s)
- Jan Hynek
- Department of Materials Science, Institute of Inorganic Chemistry of the Czech Academy of Sciences, v.v.i. Husinec-Rez 1001, Rez, 25068, Czech Republic
| | - Petr Brázda
- Department of Structure Analysis, Institute of Physics of the Czech Academy of Sciences, 18221, Prague, Czech Republic
| | - Jan Rohlíček
- Department of Structure Analysis, Institute of Physics of the Czech Academy of Sciences, 18221, Prague, Czech Republic
| | - Michael G S Londesborough
- Department of Materials Science, Institute of Inorganic Chemistry of the Czech Academy of Sciences, v.v.i. Husinec-Rez 1001, Rez, 25068, Czech Republic
| | - Jan Demel
- Department of Materials Science, Institute of Inorganic Chemistry of the Czech Academy of Sciences, v.v.i. Husinec-Rez 1001, Rez, 25068, Czech Republic
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19
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Hynek J, Brázda P, Rohlíček J, Londesborough MGS, Demel J. Phosphinic Acid Based Linkers: Building Blocks in Metal-Organic Framework Chemistry. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201800884] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Jan Hynek
- Department of Materials Science; Institute of Inorganic Chemistry of the Czech Academy of Sciences; v.v.i. Husinec-Rez 1001 Rez 25068 Czech Republic
| | - Petr Brázda
- Department of Structure Analysis; Institute of Physics of the Czech Academy of Sciences; 18221 Prague Czech Republic
| | - Jan Rohlíček
- Department of Structure Analysis; Institute of Physics of the Czech Academy of Sciences; 18221 Prague Czech Republic
| | - Michael G. S. Londesborough
- Department of Materials Science; Institute of Inorganic Chemistry of the Czech Academy of Sciences; v.v.i. Husinec-Rez 1001 Rez 25068 Czech Republic
| | - Jan Demel
- Department of Materials Science; Institute of Inorganic Chemistry of the Czech Academy of Sciences; v.v.i. Husinec-Rez 1001 Rez 25068 Czech Republic
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20
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Hynek J, Zelenka J, Rathouský J, Kubát P, Ruml T, Demel J, Lang K. Designing Porphyrinic Covalent Organic Frameworks for the Photodynamic Inactivation of Bacteria. ACS Appl Mater Interfaces 2018; 10:8527-8535. [PMID: 29470048 DOI: 10.1021/acsami.7b19835] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Microbial colonization of biomedical devices is a recognized complication contributing to healthcare-associated infections. One of the possible approaches to prevent surfaces from the biofilm formation is antimicrobial photodynamic inactivation based on the cytotoxic effect of singlet oxygen, O2(1Δg), a short-lived, highly oxidative species, produced by energy transfer between excited photosensitizers and molecular oxygen. We synthesized porphyrin-based covalent organic frameworks (COFs) by Schiff-base chemistry. These novel COFs have a three-dimensional, diamond-like structure. The detailed analysis of their photophysical and photochemical properties shows that the COFs effectively produce O2(1Δg) under visible light irradiation, and especially three-dimensional structures have strong antibacterial effects toward Pseudomonas aeruginosa and Enterococcus faecalis biofilms. The COFs exhibit high photostability and broad spectral efficiency. Hence, the porphyrinic COFs are suitable candidates for the design of antibacterial coating for indoor applications.
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Affiliation(s)
- Jan Hynek
- Institute of Inorganic Chemistry , Czech Academy of Sciences , Husinec-Řež 1001 , 250 68 Řež , Czech Republic
- Department of Inorganic Chemistry, Faculty of Science , Charles University , Hlavova 2030 , 128 43 Praha 2 , Czech Republic
| | - Jaroslav Zelenka
- Department of Biochemistry and Microbiology , University of Chemistry and Technology Prague , Technická 5 , 166 28 Praha 6 , Czech Republic
| | - Jiří Rathouský
- J. Heyrovský Institute of Physical Chemistry , Czech Academy of Sciences , Dolejškova 3 , 182 23 Praha 8 , Czech Republic
| | - Pavel Kubát
- J. Heyrovský Institute of Physical Chemistry , Czech Academy of Sciences , Dolejškova 3 , 182 23 Praha 8 , Czech Republic
| | - Tomáš Ruml
- Department of Biochemistry and Microbiology , University of Chemistry and Technology Prague , Technická 5 , 166 28 Praha 6 , Czech Republic
| | - Jan Demel
- Institute of Inorganic Chemistry , Czech Academy of Sciences , Husinec-Řež 1001 , 250 68 Řež , Czech Republic
| | - Kamil Lang
- Institute of Inorganic Chemistry , Czech Academy of Sciences , Husinec-Řež 1001 , 250 68 Řež , Czech Republic
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Schneiderová B, Demel J, Zhigunov A, Bohuslav J, Tarábková H, Janda P, Lang K. Nickel-cobalt hydroxide nanosheets: Synthesis, morphology and electrochemical properties. J Colloid Interface Sci 2017; 499:138-144. [DOI: 10.1016/j.jcis.2017.03.096] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2017] [Revised: 03/16/2017] [Accepted: 03/22/2017] [Indexed: 11/26/2022]
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22
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Bůžek D, Zelenka J, Ulbrich P, Ruml T, Křížová I, Lang J, Kubát P, Demel J, Kirakci K, Lang K. Nanoscaled porphyrinic metal-organic frameworks: photosensitizer delivery systems for photodynamic therapy. J Mater Chem B 2017; 5:1815-1821. [PMID: 32263922 DOI: 10.1039/c6tb03230c] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The photocytotoxic activity of porphyrin-containing materials including metal-organic frameworks (MOFs) has attracted ever increasing interest. We have developed a simple synthesis of hexagonal PCN-222/MOF-545 nanoparticles, which are powerful in inducing reactive oxygen species-mediated apoptosis of cancer cells upon visible light irradiation. The extent of the cytotoxic effect well correlates with the nanoparticle size and structural instability. High phototoxicity of the presented nanoparticles and their deactivation within several hours open up the door to possible applications in cancer therapy.
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Affiliation(s)
- Daniel Bůžek
- Institute of Inorganic Chemistry of the Czech Academy of Sciences, v.v.i., Husinec-Řež 1001, 250 68 Řež, Czech Republic.
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23
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Hynek J, Ondrušová S, Bůžek D, Kovář P, Rathouský J, Demel J. Postsynthetic modification of a zirconium metal–organic framework at the inorganic secondary building unit with diphenylphosphinic acid for increased photosensitizing properties and stability. Chem Commun (Camb) 2017; 53:8557-8560. [DOI: 10.1039/c7cc05068b] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The postsynthetic cluster modification of the zirconium metal–organic framework PCN-222/MOF-545 by diphenylphosphinic acid resulted in enhanced photosensitizing properties and water stability.
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Affiliation(s)
- J. Hynek
- Institute of Inorganic Chemistry of the Czech Academy of Sciences
- 250 68 Řež
- Czech Republic
| | - S. Ondrušová
- Institute of Inorganic Chemistry of the Czech Academy of Sciences
- 250 68 Řež
- Czech Republic
| | - D. Bůžek
- Institute of Inorganic Chemistry of the Czech Academy of Sciences
- 250 68 Řež
- Czech Republic
| | - P. Kovář
- Charles University
- Faculty of Mathematics and Physics
- Praha 2
- Czech Republic
| | - J. Rathouský
- J. Heyrovský Institute of Physical Chemistry of the Czech Academy of Sciences
- 182 23 Praha 8
- Czech Republic
| | - J. Demel
- Institute of Inorganic Chemistry of the Czech Academy of Sciences
- 250 68 Řež
- Czech Republic
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Bůžek D, Hynek J, Kučeráková M, Kirakci K, Demel J, Lang K. MoIICluster Complex-Based Coordination Polymer as an Efficient Heterogeneous Catalyst in the Suzuki-Miyaura Coupling Reaction. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600704] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Daniel Bůžek
- Institute of Inorganic Chemistry of the Czech Academy of Sciences; v.v.i 25068 Řež Husinec-Řež 1001 Czech Republic
- Faculty of the Environment; Jan Evangelista Purkyně University; Králova Výšina 3132/7 40096 Ústí nad Labem Czech Republic
| | - Jan Hynek
- Institute of Inorganic Chemistry of the Czech Academy of Sciences; v.v.i 25068 Řež Husinec-Řež 1001 Czech Republic
| | - Monika Kučeráková
- Institute of Physics of the Czech Academy of Sciences; v.v.i. Cukrovarnická 10/112 16200 Praha 6 Czech Republic
| | - Kaplan Kirakci
- Institute of Inorganic Chemistry of the Czech Academy of Sciences; v.v.i 25068 Řež Husinec-Řež 1001 Czech Republic
| | - Jan Demel
- Institute of Inorganic Chemistry of the Czech Academy of Sciences; v.v.i 25068 Řež Husinec-Řež 1001 Czech Republic
| | - Kamil Lang
- Institute of Inorganic Chemistry of the Czech Academy of Sciences; v.v.i 25068 Řež Husinec-Řež 1001 Czech Republic
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Jan J, Novosadova M, Demel J, Ourednicek P, Chmelik J, Jakubicek R. Combined bone lesion analysis in 3D CT data of vertebrae. Annu Int Conf IEEE Eng Med Biol Soc 2016; 2015:6374-7. [PMID: 26737751 DOI: 10.1109/embc.2015.7319851] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Two novel statistically based methods for bone lesion detection and classification are presented. Together with the previously published MRF method [15], they form a triad of mutually complementary methods that promise, when fused, to enable higher reliability of bone lesion assessment.
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Abstract
Novel porphyrin-based conjugated microporous polymers displayed high O2(1Δg) production, were stable in organic solvents, and did not undergo measurable photobleaching.
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Affiliation(s)
- Jan Hynek
- Institute of Inorganic Chemistry of the Czech Academy of Sciences
- 250 68 Řež
- Czech Republic
- Department of Inorganic Chemistry
- Faculty of Science
| | - Jiří Rathouský
- J. Heyrovský Institute of Physical Chemistry of the Czech Academy of Sciences
- 182 23 Praha 8
- Czech Republic
| | - Jan Demel
- Institute of Inorganic Chemistry of the Czech Academy of Sciences
- 250 68 Řež
- Czech Republic
| | - Kamil Lang
- Institute of Inorganic Chemistry of the Czech Academy of Sciences
- 250 68 Řež
- Czech Republic
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Hynek J, Kalousek V, Zouželka R, Bezdička P, Dzik P, Rathouský J, Demel J, Lang K. High photocatalytic activity of transparent films composed of ZnO nanosheets. Langmuir 2014; 30:380-386. [PMID: 24328455 DOI: 10.1021/la404017q] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Nanometric thin films were prepared by dip-coating and inkjet printing ZnO nanosheets on glass plates. The side-by-side alignment of the ZnO nanosheets on the substrate resulted in thin, transparent, oriented ZnO surfaces with the high-energy {001} facets exposed. The method of nanosheet deposition affected the film morphology; the dip-coated films were very smooth and nonporous, while the inkjet-printed films were rough and porous with the estimated void volume approximately 60-70% of the total film volume. The first-order rate constants for the photocatalytic degradation of 4-chlorophenol on the nanosheet-based films were approximately 2 times larger than those on nanocolumnar ZnO films or ZnO films prepared by the sol-gel technique. We attribute the high photocatalytic activity of the ZnO nanosheets to the fact that their {001} facets were predominantly exposed to the oxidized substrate. This surface arrangement and the simplicity of fabricating the ZnO nanosheet-based films make them promising for the construction of optical devices and dye-sensitized solar cells.
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Affiliation(s)
- Jan Hynek
- Institute of Inorganic Chemistry of the AS CR, v. v. i., Husinec-Řež 1001, 250 68 Řež, Czech Republic
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Schneiderová B, Demel J, Pleštil J, Tarábková H, Bohuslav J, Lang K. Electrochemical performance of cobalt hydroxide nanosheets formed by the delamination of layered cobalt hydroxide in water. Dalton Trans 2014; 43:10484-91. [DOI: 10.1039/c4dt00141a] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Demel J, Kubát P, Millange F, Marrot J, Císařová I, Lang K. Lanthanide-Porphyrin Hybrids: from Layered Structures to Metal–Organic Frameworks with Photophysical Properties. Inorg Chem 2013; 52:2779-86. [DOI: 10.1021/ic400182u] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Jan Demel
- Institute
of Inorganic Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Husinec-Řež 1001, 250
68 Řež, Czech Republic
| | - Pavel Kubát
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i.,
Dolejškova 3, 182 23 Praha 8, Czech Republic
| | - Franck Millange
- Institut Lavoisier, UMR CNRS 8180, Université de Versailles Saint-Quentin-en-Yvelines, 45 Avenue des Etats-Unis, 78035 Versailles Cedex, France
| | - Jérôme Marrot
- Institut Lavoisier, UMR CNRS 8180, Université de Versailles Saint-Quentin-en-Yvelines, 45 Avenue des Etats-Unis, 78035 Versailles Cedex, France
| | - Ivana Císařová
- Department of Inorganic Chemistry,
Faculty of Science, Charles University in Prague, Hlavova 2030, 128 40 Praha, Czech Republic
| | - Kamil Lang
- Institute
of Inorganic Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Husinec-Řež 1001, 250
68 Řež, Czech Republic
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Demel J, Pleštil J, Bezdička P, Janda P, Klementová M, Lang K. Layered zinc hydroxide salts: Delamination, preferred orientation of hydroxide lamellae, and formation of ZnO nanodiscs. J Colloid Interface Sci 2011; 360:532-9. [DOI: 10.1016/j.jcis.2011.04.024] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2011] [Revised: 03/29/2011] [Accepted: 04/08/2011] [Indexed: 11/25/2022]
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Štěpnička P, Semler M, Demel J, Zukal A, Čejka J. Reductive dehalogenation of aryl halides over palladium catalysts deposited on SBA-15 type molecular sieve modified with amine donor groups. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.molcata.2011.04.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Demel J, Čejka J, Štěpnička P. Palladium catalysts deposited on silica materials: Comparison of catalysts based on mesoporous and amorphous supports in Heck reaction. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.molcata.2010.06.011] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Demel J, Sujandi, Park SE, Čejka J, Štěpnička P. Preparation of heterogeneous catalysts supported on mesoporous molecular sieves modified with various N-groups and their use in the Heck reaction. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.molcata.2008.11.025] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Demel J, Lamac M, Cejka J, Stepnicka P. Palladium catalysts supported on mesoporous molecular sieves bearing nitrogen donor groups: preparation and use in Heck and Suzuki C-C bond-forming reactions. ChemSusChem 2009; 2:442-451. [PMID: 19418499 DOI: 10.1002/cssc.200900006] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
A series of supported catalysts is prepared by treatment of SBA-15-type mesoporous molecular sieve bearing [triple chemical bond]SiCH(2)CH(2)CH(2)NHCH(2)CH(2)NEt(2) groups with palladium(II) acetate. These catalysts are studied in Suzuki biaryl couplings and in Heck reactions to establish the influence of metal loading and innocent surface modifications (trimethylsilylation). The Suzuki reaction proceeded efficiently with model and practically relevant substrates; the catalyst performance increasing with an increasing degree of metalation (decreasing N/Pd ratio). Catalyst poisoning tests revealed that the reaction takes place in the liquid phase with the catalyst serving as a reservoir of active metal species and also as a stabilizing support once the reaction is performed. In the Heck reactions, on the other hand, the catalyst performance strongly changed with the reaction temperature and with the N/Pd ratio. The material with the lowest metal loading (0.01 mmol palladium per gram of material, N/Pd ratio ca. 100:1) proved particularly attractive in the Heck coupling, being highly active at elevated temperatures, recyclable, and capable of acting as a bifunctional catalyst (i.e., functioning without any external base.
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Affiliation(s)
- Jan Demel
- Department of Inorganic Chemistry, Faculty of Science, Charles University in Prague, Hlavova 2030, Prague 2, Czech Republic
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Kühnert J, Lamač M, Demel J, Nicolai A, Lang H, Štěpnička P. Phosphinoferrocenyl-terminated amidoamines: Synthesis and catalytic utilization in palladium-mediated C–C bond forming reactions. ACTA ACUST UNITED AC 2008. [DOI: 10.1016/j.molcata.2008.01.026] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Demel J, Čejka J, Štěpnička P. The use of palladium nanoparticles supported on MCM-41 mesoporous molecular sieves in Heck reaction: A comparison of basic and neutral supports. ACTA ACUST UNITED AC 2007. [DOI: 10.1016/j.molcata.2007.05.001] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Kühnert J, Dusek M, Demel J, Lang H, Stepnicka P. Synthesis, coordination and catalytic use of 1-(diphenylphosphino)-1'-carbamoylferrocenes with pyridyl-containing N-substituents. Dalton Trans 2007:2802-11. [PMID: 17592597 DOI: 10.1039/b701012e] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ferrocene phosphinocarboxamides, 1-(diphenylphosphino)-1'-{N-[(2-pyridyl)methyl]carbamoyl}ferrocene (1) and 1-(diphenylphosphino)-1'-{N-[2-(2-pyridyl)ethyl]carbamoyl}ferrocene (2) were prepared from 1-(diphenylphosphino)-1'-ferrocenecarboxylic acid and studied as ligands for palladium. Starting with [PdCl2(cod)], the reactions at a 2 : 1 ligand-to-metal ratio gave uniformly the bis-phosphine complexes [PdCl2(L-kappaP)2] (3, L = 1; 4, L = 2) whereas those performed at a 1 : 1 ratio yielded distinct products: [PdCl2(1-kappa(2)P,N)] (5) with 1 coordinating as a trans-spanning P,N-donor, and the symmetric, P,N-bridged dimer [(micro-2-N,P)2{PdCl2}2] (6), respectively. The crystal structures of 1, 2, 4.4CHCl3, 5.AcOH, and 6.8CHCl3 as determined by X-ray diffraction showed the compounds to form well defined solid-state assemblies through hydrogen bonds. Testing of the phosphinocarboxamides in the palladium-catalysed Suzuki cross-coupling reaction revealed 1 and 2, combined with Pd(OAc)2 to form efficient catalysts for the reactions of aryl bromides while aryl chlorides coupled only when activated with electron-withdrawing groups.
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Affiliation(s)
- Janett Kühnert
- Charles University, Faculty of Natural Sciences, Department of Inorganic Chemistry, Hlavova 2030, 128 40, Prague, Czech Republic
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Štěpnička P, Demel J, Čejka J. Preparation and catalytic application of MCM-41 modified with a ferrocene carboxyphosphine and a ruthenium complex. ACTA ACUST UNITED AC 2004. [DOI: 10.1016/j.molcata.2004.07.032] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Demel J, Buchberger W, Malissa H. Multiclass/multiresidue method for monitoring widely applied plant protecting agents in air during field dispersion work. J Chromatogr A 2001; 931:107-17. [PMID: 11695513 DOI: 10.1016/s0021-9673(01)01206-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
A multiclass/multiresidue method for surveying the uptake of plant protecting chemicals by inhalation during field spraying work is described. Eleven nowadays mainly dispersed compounds, which cover a wide range of chemical properties, are analysed in air with personal active sampling and in one single analytical run. This has the advantage, that one basic method only needs to be implemented, calibrated and validated in a laboratory to perform varying monitoring tasks without changing the method itself. Samples were taken with Tenax sorbent tubes operated to collect the active compounds simultaneously in the vapour state, in aerosol state or bound to particles. The procedure consists of four unit operations only: sampling, elution, dilution and HPLC measurement, and is described in SOP-format. The limits of quantification, calculated as method detection limits, were between 1 and 9 microg m(-3) based on 1 m3 air volume sampled (8 h). Method performance was characterised by way of generated test atmospheres and field spraying trials.
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Affiliation(s)
- J Demel
- Institute of Chemistry, University of Linz, Austria
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Demel J, Hora V, Sura M. Information system for the registration of pollution sources associated with construction activities. Environ Monit Assess 1995; 34:197-202. [PMID: 24202046 DOI: 10.1007/bf00546035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
A prospective builder in Czech Republic has to apply for approval by local (regional, state) authorities and is liable, in the Environmental Impact Assessment (EIA) process to make an accurate statement of stress factor values produced during the life cycle of the construction work.These data should be kept in the information system, as only a substantial amount of relevant high quality data can be used in the decision-making process.Identifying and quantifying stress factors produced by a given construction activity can present a problem due to inadequate knowledge and opinion in this field. For large construction works, a knowledge-based system proposed in the second part of this paper may be useful; small structures can be covered by the information given as to local factors, which form part of the information system proposed by Vlcek and Moos (1991).
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Affiliation(s)
- J Demel
- Department of Informatics, Faculty of Civil Engineering, Czech Technical University, Prague, Czech Republic
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Demel J. [Health status of a 10-year-old boy after surgery for intestinal atresia in infancy]. Cesk Pediatr 1971; 26:383-4. [PMID: 5095993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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Demel J. [On the problem of drainage of the abdominal cavity]. Rozhl Chir 1969; 48:184-188. [PMID: 5790665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
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Demel J. [Our experience with the operation of a central sterilization unit]. Cesk Zdrav 1967; 15:190-4. [PMID: 6046474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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