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Wang C, Sakai N, Ebina Y, Kikuchi T, Grzybek J, Roth WJ, Gil B, Ma R, Sasaki T. Construction of Hierarchical Films via Layer-by-Layer Assembly of Exfoliated Unilamellar Zeolite Nanosheets. Small 2024:e2308293. [PMID: 38282181 DOI: 10.1002/smll.202308293] [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] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Revised: 12/19/2023] [Indexed: 01/30/2024]
Abstract
Zeolites have been widely applied as versatile catalysts, sorbents, and ion exchangers with unique porous structures showing molecular sieving capability. In these years, it is reported that some layered zeolites can be delaminated into molecularly thin 2-dimensional (2D) nanosheets characterized by inherent porous structures and highly exposed active sites. In the present study, two types of zeolite nanosheets with distinct porous structures with MWW topology (denoted mww) and ferrierite-related structure (denoted bifer) are deposited on a substrate through the solution process via electrostatic self-assembly. Alternate deposition of zeolite nanosheets with polycation under optimized conditions allows the layer-by-layer growth of their multilayer films with a stacking distance of 2-3 nm. Furthermore, various hierarchical structures defined at the unit-cell dimensions can be constructed simply by conducting the deposition of mww and bifer nanosheets in a designed sequence. Adsorption of a dye, Rhodamine B, in these films, is examined to show that adsorption is dependent on constituent zeolite nanosheets and their assembled nanostructures. This work has provided fundamental advancements in the fabrication of artificial zeolite-related hierarchical structures, which may be extended to other zeolite nanosheets, broadening their functionalities, applications, and benefits.
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Affiliation(s)
- Chenhui Wang
- Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan
| | - Nobuyuki Sakai
- Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan
| | - Yasuo Ebina
- Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan
| | - Takayuki Kikuchi
- Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan
| | - Justyna Grzybek
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, Kraków, 30-387, Poland
| | - Wieslaw J Roth
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, Kraków, 30-387, Poland
| | - Barbara Gil
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, Kraków, 30-387, Poland
| | - Renzhi Ma
- Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan
| | - Takayoshi Sasaki
- Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan
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2
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Roth WJ, Opanasenko M, Mazur M, Gil B, Čejka J, Sasaki T. Current State and Perspectives of Exfoliated Zeolites. Adv Mater 2024; 36:e2307341. [PMID: 37800413 DOI: 10.1002/adma.202307341] [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] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 09/15/2023] [Indexed: 10/07/2023]
Abstract
Zeolites are highly efficient industrial catalysts and sorbents with microporous framework structures. Approximately 10% of the frameworks, but eventually all in the long run, have produced both 3D crystals and 2D layers. The latter can be intercalated and expanded like all 2D materials but proved difficult to exfoliate directly into suspensions of monolayers in solution as precursors for unique synthetic opportunities. Successful exfoliations have been reported recently and are overviewed in this perspective article. The discussion highlights 3 primary challenges in this field, namely finding suitable 2D zeolite preparations that exfoliate directly in high yield, proving uniform layer thickness in solution and identifying applications to exploit the unique synthetic capabilities and properties of exfoliated zeolite monolayers. Four zeolites have been confirmed to exfoliate directly into monolayers: 3 with known structures-MWW, MFI, and RWR and one unknown, bifer with a unit cell close to ferrierite. The exfoliation into monolayers is confirmed by the combination of 5-6 characterization techniques including AFM, in situ and in-plane XRD, and microscopies. The promising areas of development are oriented films and membranes, intimately mixed zeolite phases, and hierarchical nanoscale composites with other active species like nanoparticles and clusters that are unfeasible by solid state processes.
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Affiliation(s)
- Wieslaw J Roth
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, Kraków, 30-387, Poland
| | - Maksym Opanasenko
- Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University, Hlavova 8, Prague 2, 12843, Czech Republic
| | - Michal Mazur
- Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University, Hlavova 8, Prague 2, 12843, Czech Republic
| | - Barbara Gil
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, Kraków, 30-387, Poland
| | - Jiří Čejka
- Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University, Hlavova 8, Prague 2, 12843, Czech Republic
| | - Takayoshi Sasaki
- Research Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan
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Clua-Provost T, Durand A, Mu Z, Rastoin T, Fraunié J, Janzen E, Schutte H, Edgar JH, Seine G, Claverie A, Marie X, Robert C, Gil B, Cassabois G, Jacques V. Isotopic Control of the Boron-Vacancy Spin Defect in Hexagonal Boron Nitride. Phys Rev Lett 2023; 131:126901. [PMID: 37802939 DOI: 10.1103/physrevlett.131.126901] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Accepted: 08/26/2023] [Indexed: 10/08/2023]
Abstract
We report on electron spin resonance (ESR) spectroscopy of boron-vacancy (V_{B}^{-}) centers hosted in isotopically engineered hexagonal boron nitride (hBN) crystals. We first show that isotopic purification of hBN with ^{15}N yields a simplified and well-resolved hyperfine structure of V_{B}^{-} centers, while purification with ^{10}B leads to narrower ESR linewidths. These results establish isotopically purified h^{10}B^{15}N crystals as the optimal host material for future use of V_{B}^{-} spin defects in quantum technologies. Capitalizing on these findings, we then demonstrate optically induced polarization of ^{15}N nuclei in h^{10}B^{15}N, whose mechanism relies on electron-nuclear spin mixing in the V_{B}^{-} ground state. This work opens up new prospects for future developments of spin-based quantum sensors and simulators on a two-dimensional material platform.
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Affiliation(s)
- T Clua-Provost
- Laboratoire Charles Coulomb, Université de Montpellier and CNRS, 34095 Montpellier, France
| | - A Durand
- Laboratoire Charles Coulomb, Université de Montpellier and CNRS, 34095 Montpellier, France
| | - Z Mu
- Laboratoire Charles Coulomb, Université de Montpellier and CNRS, 34095 Montpellier, France
| | - T Rastoin
- Laboratoire Charles Coulomb, Université de Montpellier and CNRS, 34095 Montpellier, France
| | - J Fraunié
- Université de Toulouse, INSA-CNRS-UPS, LPCNO, 135 Avenue Rangueil, 31077 Toulouse, France
| | - E Janzen
- Tim Taylor Department of Chemical Engineering, Kansas State University, Manhattan, Kansas 66506, USA
| | - H Schutte
- Tim Taylor Department of Chemical Engineering, Kansas State University, Manhattan, Kansas 66506, USA
| | - J H Edgar
- Tim Taylor Department of Chemical Engineering, Kansas State University, Manhattan, Kansas 66506, USA
| | - G Seine
- CEMES-CNRS and Université de Toulouse, 29 rue J. Marvig, 31055 Toulouse, France
| | - A Claverie
- CEMES-CNRS and Université de Toulouse, 29 rue J. Marvig, 31055 Toulouse, France
| | - X Marie
- Université de Toulouse, INSA-CNRS-UPS, LPCNO, 135 Avenue Rangueil, 31077 Toulouse, France
| | - C Robert
- Université de Toulouse, INSA-CNRS-UPS, LPCNO, 135 Avenue Rangueil, 31077 Toulouse, France
| | - B Gil
- Laboratoire Charles Coulomb, Université de Montpellier and CNRS, 34095 Montpellier, France
| | - G Cassabois
- Laboratoire Charles Coulomb, Université de Montpellier and CNRS, 34095 Montpellier, France
| | - V Jacques
- Laboratoire Charles Coulomb, Université de Montpellier and CNRS, 34095 Montpellier, France
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Durand A, Clua-Provost T, Fabre F, Kumar P, Li J, Edgar JH, Udvarhelyi P, Gali A, Marie X, Robert C, Gérard JM, Gil B, Cassabois G, Jacques V. Optically Active Spin Defects in Few-Layer Thick Hexagonal Boron Nitride. Phys Rev Lett 2023; 131:116902. [PMID: 37774304 DOI: 10.1103/physrevlett.131.116902] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Accepted: 08/22/2023] [Indexed: 10/01/2023]
Abstract
Optically active spin defects in hexagonal boron nitride (hBN) are promising quantum systems for the design of two-dimensional quantum sensing units offering optimal proximity to the sample being probed. In this Letter, we first demonstrate that the electron spin resonance frequencies of boron vacancy centers (V_{B}^{-}) can be detected optically in the limit of few-atomic-layer thick hBN flakes despite the nanoscale proximity of the crystal surface that often leads to a degradation of the stability of solid-state spin defects. We then analyze the variations of the electronic spin properties of V_{B}^{-} centers with the hBN thickness with a focus on (i) the zero-field splitting parameters, (ii) the optically induced spin polarization rate and (iii) the longitudinal spin relaxation time. This Letter provides important insights into the properties of V_{B}^{-} centers embedded in ultrathin hBN flakes, which are valuable for future developments of foil-based quantum sensing technologies.
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Affiliation(s)
- A Durand
- Laboratoire Charles Coulomb, Université de Montpellier and CNRS, 34095 Montpellier, France
| | - T Clua-Provost
- Laboratoire Charles Coulomb, Université de Montpellier and CNRS, 34095 Montpellier, France
| | - F Fabre
- Laboratoire Charles Coulomb, Université de Montpellier and CNRS, 34095 Montpellier, France
| | - P Kumar
- Laboratoire Charles Coulomb, Université de Montpellier and CNRS, 34095 Montpellier, France
| | - J Li
- Tim Taylor Department of Chemical Engineering, Kansas State University, Kansas 66506, USA
| | - J H Edgar
- Tim Taylor Department of Chemical Engineering, Kansas State University, Kansas 66506, USA
| | - P Udvarhelyi
- Department of Atomic Physics, Budapest University of Technology and Economics, H-1111 Budapest, Hungary
| | - A Gali
- Department of Atomic Physics, Budapest University of Technology and Economics, H-1111 Budapest, Hungary
- Wigner Research Centre for Physics, P.O. Box 49, H-1525 Budapest, Hungary
| | - X Marie
- Université de Toulouse, INSA-CNRS-UPS, LPCNO, 135 Avenue Rangueil, 31077 Toulouse, France
| | - C Robert
- Université de Toulouse, INSA-CNRS-UPS, LPCNO, 135 Avenue Rangueil, 31077 Toulouse, France
| | - J M Gérard
- Univ. Grenoble Alpes, CEA, Grenoble INP, IRIG, PHELIQS, "Nanophysique et Semiconducteurs" Group, F-38000 Grenoble, France
| | - B Gil
- Laboratoire Charles Coulomb, Université de Montpellier and CNRS, 34095 Montpellier, France
| | - G Cassabois
- Laboratoire Charles Coulomb, Université de Montpellier and CNRS, 34095 Montpellier, France
| | - V Jacques
- Laboratoire Charles Coulomb, Université de Montpellier and CNRS, 34095 Montpellier, France
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5
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Damilano B, Vézian S, Brault J, Ruterana P, Gil B, Tchernycheva M. Nanoporous GaN by selective area sublimation through an epitaxial nanomask: AlN versus Si xN y. Nanotechnology 2023; 34:245602. [PMID: 36913723 DOI: 10.1088/1361-6528/acc3a2] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Accepted: 03/12/2023] [Indexed: 06/18/2023]
Abstract
Nanoporous GaN layers were fabricated using selective area sublimation through a self-organized AlN nanomask in a molecular beam epitaxy reactor. The obtained pore morphology, density and size were measured using plan-view and cross-section scanning electron microscopy experiments. It was found that the porosity of the GaN layers could be adjusted from 0.04 to 0.9 by changing the AlN nanomask thickness and sublimation conditions. The room temperature photoluminescence properties as a function of the porosity were analysed. In particular, a strong improvement (>100) of the room temperature photoluminescence intensity was observed for porous GaN layers with a porosity in the 0.4-0.65 range. The characteristics of these porous layers were compared to those obtained with a SixNynanomask. Furthermore, the regrowth of p-type GaN on light emitting diode structures made porous by using either an AlN or a SixNynanomask were compared.
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Affiliation(s)
- B Damilano
- Université Côte d'Azur, CNRS, CRHEA, Rue B. Gregory, Valbonne, France
| | - S Vézian
- Université Côte d'Azur, CNRS, CRHEA, Rue B. Gregory, Valbonne, France
| | - J Brault
- Université Côte d'Azur, CNRS, CRHEA, Rue B. Gregory, Valbonne, France
| | - P Ruterana
- Centre de Recherche sur les Ions, les Matériaux et la Photonique, CIMAP-ENSICAEN, UMR 6252, 6 Boulevard Maréchal Juin 14050, Caen, France
| | - B Gil
- Laboratoire Charles Coulomb, UMR 5221 CNRS-Université de Montpellier, F-34095 Montpellier, France
| | - M Tchernycheva
- Centre de Nanosciences et de Nanotechnologies (C2N), UMR 9001 CNRS, Université Paris-Saclay, 10 Boulevard Thomas Gobert, Palaiseau 91120, France
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6
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Roth WJ, Sasaki T, Wolski K, Gil B, Zapotoczny S, Čejka J, Kubů M, Mazur M, Ebina Y, Sakai N, Tang DM, Ma R. Exfoliating layered zeolite MFI into unilamellar nanosheets in solution as precursors for the synthesis of hierarchical nanocomposites and oriented films. Inorg Chem Front 2023. [DOI: 10.1039/d2qi02283d] [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: 01/28/2023]
Abstract
The separation of layered MFI into unilamellar nanosheets in solution confirms the general validity of soft-chemical exfoliation for zeolites and allows top-down production of films with potential applications in separation and catalysis.
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Affiliation(s)
- Wieslaw J. Roth
- Jagiellonian University, Faculty of Chemistry, Gronostajowa 2, 30-387 Kraków, Poland
| | - Takayoshi Sasaki
- International Centre for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Karol Wolski
- Jagiellonian University, Faculty of Chemistry, Gronostajowa 2, 30-387 Kraków, Poland
| | - Barbara Gil
- Jagiellonian University, Faculty of Chemistry, Gronostajowa 2, 30-387 Kraków, Poland
| | - Szczepan Zapotoczny
- Jagiellonian University, Faculty of Chemistry, Gronostajowa 2, 30-387 Kraków, Poland
| | - Jiří Čejka
- Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University, Hlavova 8, 12840 Prague 2, Czech Republic
| | - Martin Kubů
- Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University, Hlavova 8, 12840 Prague 2, Czech Republic
| | - Michal Mazur
- Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University, Hlavova 8, 12840 Prague 2, Czech Republic
| | - Yasuo Ebina
- International Centre for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Nobuyuki Sakai
- International Centre for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Dai-Ming Tang
- International Centre for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Renzhi Ma
- International Centre for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
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Jajko G, Calero S, Kozyra P, Makowski W, Sławek A, Gil B, Gutiérrez-Sevillano JJ. Defect-induced tuning of polarity-dependent adsorption in hydrophobic-hydrophilic UiO-66. Commun Chem 2022; 5:120. [PMID: 36697947 PMCID: PMC9814431 DOI: 10.1038/s42004-022-00742-z] [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] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Accepted: 09/26/2022] [Indexed: 01/28/2023] Open
Abstract
Structural defects in metal-organic frameworks can be exploited to tune material properties. In the case of UiO-66 material, they may change its nature from hydrophobic to hydrophilic and therefore affect the mechanism of adsorption of polar and non-polar molecules. In this work, we focused on understanding this mechanism during adsorption of molecules with different dipole moments, using the standard volumetric adsorption measurements, IR spectroscopy, DFT + D calculations, and Monte Carlo calculations. Average occupation profiles showed that polar and nonpolar molecules change their preferences for adsorption sites. Hence, defects in the structure can be used to tune the adsorption properties of the MOF as well as to control the position of the adsorbates within the micropores of UiO-66.
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Affiliation(s)
- Gabriela Jajko
- grid.5522.00000 0001 2162 9631Faculty of Chemistry, Jagiellonian University in Kraków, Gronostajowa 2, 30-387 Kraków, Poland
| | - Sofia Calero
- grid.6852.90000 0004 0398 8763Materials Simulation and Modelling, Department of Applied Physics, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands
| | - Paweł Kozyra
- grid.5522.00000 0001 2162 9631Faculty of Chemistry, Jagiellonian University in Kraków, Gronostajowa 2, 30-387 Kraków, Poland
| | - Wacław Makowski
- grid.5522.00000 0001 2162 9631Faculty of Chemistry, Jagiellonian University in Kraków, Gronostajowa 2, 30-387 Kraków, Poland
| | - Andrzej Sławek
- grid.9922.00000 0000 9174 1488AGH University of Science and Technology, Academic Centre for Materials and Nanotechnology, al. A. Mickiewicza 30, 30-059 Kraków, Poland
| | - Barbara Gil
- grid.5522.00000 0001 2162 9631Faculty of Chemistry, Jagiellonian University in Kraków, Gronostajowa 2, 30-387 Kraków, Poland
| | - Juan José Gutiérrez-Sevillano
- grid.15449.3d0000 0001 2200 2355Department of Physical, Chemical and Natural Systems, Universidad Pablo de Olavide, Ctra. Utrera Km. 1, Seville, ES-41013 Spain
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8
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de Brucker L, Moret M, Gil B, Desrat W. Determination of the direct bandgap value in In 4Se 3thin films. J Phys Condens Matter 2022; 34:425703. [PMID: 35961285 DOI: 10.1088/1361-648x/ac895f] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Accepted: 08/12/2022] [Indexed: 06/15/2023]
Abstract
The value and the nature of the bandgap of In4Se3are still not well defined, with a large spread of the experimental data between 0.42 and 1.68 eV and an uncertain nature, predicted to be indirect byab initioband structure calculations. Here we report on the optical transmission and photoluminescence (PL) performed in In4Se3thin films grown by coevaporation on (0001)-oriented sapphire wafers. The quality of the polycrystalline layers allows the first detection of the excitonic-like transition in the optical absorption of this compound at low temperature. The PL detected under weak laser excitation shows a bound exciton emission at 0.75 eV. Strong laser irradiation reveals a quadratic dependence of the PL intensity on the optical excitation, which demonstrates a stimulated emission at 0.79 eV in relation with an exciton-exciton scattering process. On the basis of a reasonable estimate of the exciton energy, equal to10-15meV, we evaluate the direct bandgap of In4Se3to0.82±0.01eV at low temperature.
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Affiliation(s)
- L de Brucker
- Laboratoire Charles Coulomb (L2C), Université de Montpellier, CNRS, Montpellier FR-34095, France
| | - M Moret
- Laboratoire Charles Coulomb (L2C), Université de Montpellier, CNRS, Montpellier FR-34095, France
| | - B Gil
- Laboratoire Charles Coulomb (L2C), Université de Montpellier, CNRS, Montpellier FR-34095, France
| | - W Desrat
- Laboratoire Charles Coulomb (L2C), Université de Montpellier, CNRS, Montpellier FR-34095, France
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Haykal A, Tanos R, Minotto N, Durand A, Fabre F, Li J, Edgar JH, Ivády V, Gali A, Michel T, Dréau A, Gil B, Cassabois G, Jacques V. Decoherence of V[Formula: see text] spin defects in monoisotopic hexagonal boron nitride. Nat Commun 2022; 13:4347. [PMID: 35896526 PMCID: PMC9329290 DOI: 10.1038/s41467-022-31743-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Accepted: 06/21/2022] [Indexed: 11/20/2022] Open
Abstract
Spin defects in hexagonal boron nitride (hBN) are promising quantum systems for the design of flexible two-dimensional quantum sensing platforms. Here we rely on hBN crystals isotopically enriched with either 10B or 11B to investigate the isotope-dependent properties of a spin defect featuring a broadband photoluminescence signal in the near infrared. By analyzing the hyperfine structure of the spin defect while changing the boron isotope, we first confirm that it corresponds to the negatively charged boron-vacancy center ([Formula: see text]). We then show that its spin coherence properties are slightly improved in 10B-enriched samples. This is supported by numerical simulations employing cluster correlation expansion methods, which reveal the importance of the hyperfine Fermi contact term for calculating the coherence time of point defects in hBN. Using cross-relaxation spectroscopy, we finally identify dark electron spin impurities as an additional source of decoherence. This work provides new insights into the properties of [Formula: see text] spin defects, which are valuable for the future development of hBN-based quantum sensing foils.
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Affiliation(s)
- A. Haykal
- Laboratoire Charles Coulomb, Université de Montpellier and CNRS, Montpellier, France
| | - R. Tanos
- Laboratoire Charles Coulomb, Université de Montpellier and CNRS, Montpellier, France
| | - N. Minotto
- Laboratoire Charles Coulomb, Université de Montpellier and CNRS, Montpellier, France
| | - A. Durand
- Laboratoire Charles Coulomb, Université de Montpellier and CNRS, Montpellier, France
| | - F. Fabre
- Laboratoire Charles Coulomb, Université de Montpellier and CNRS, Montpellier, France
| | - J. Li
- Tim Taylor Department of Chemical Engineering, Kansas State University, Manhattan, KS USA
| | - J. H. Edgar
- Tim Taylor Department of Chemical Engineering, Kansas State University, Manhattan, KS USA
| | - V. Ivády
- Max Planck Institute for the Physics of Complex Systems, Dresden, Germany
- Department of Physics, Linköping University, Linköping, Sweden
| | - A. Gali
- Wigner Research Centre for Physics, Budapest, Hungary
- Department of Atomic Physics, Budapest University of Technology and Economics, Budapest, Hungary
| | - T. Michel
- Laboratoire Charles Coulomb, Université de Montpellier and CNRS, Montpellier, France
| | - A. Dréau
- Laboratoire Charles Coulomb, Université de Montpellier and CNRS, Montpellier, France
| | - B. Gil
- Laboratoire Charles Coulomb, Université de Montpellier and CNRS, Montpellier, France
| | - G. Cassabois
- Laboratoire Charles Coulomb, Université de Montpellier and CNRS, Montpellier, France
| | - V. Jacques
- Laboratoire Charles Coulomb, Université de Montpellier and CNRS, Montpellier, France
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Ogorzały K, Jajko G, Wolski K, Zapotoczny S, Kubů M, Roth WJ, Gil B, Makowski W. Catalytic activity enhancement in pillared zeolites produced from exfoliated MWW monolayers in solution. Catal Today 2022. [DOI: 10.1016/j.cattod.2021.10.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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11
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Święs A, Kowalczyk A, Gil B, Chmielarz L. Dehydration of methanol and ethanol over ferrierite originated layered zeolites – the role of acidity and porous structure. RSC Adv 2022; 12:9395-9403. [PMID: 35424876 PMCID: PMC8985092 DOI: 10.1039/d2ra00334a] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Accepted: 03/21/2022] [Indexed: 11/21/2022] Open
Abstract
Ferrierites and their delaminated (ITQ-6) and silica intercalated (ITQ-36) forms, with the intended molar Si/Al ratios of zeolite layers of 30 and 50, were synthesized and tested as catalysts of methanol to dimethyl ether (DME) as well as ethanol to diethyl ether (DEE) and ethylene dehydration. It was shown that increased content of acid sites, especially of Brønsted type, resulted in more active catalysts of alcohol dehydration. Brønsted acid sites dominate in ferrierites and their delaminated forms (ITQ-6). Contribution of the Lewis type of acid sites increased in silica pillared ferrierites (ITQ-36) possibly by deposition of aluminium species on the surface of amorphous silica. Conversion of methanol to DME was not limited by internal diffusion of reactants in narrow pores of ferrierite. Such limitation was observed for synthesis of larger DEE molecules over ferrierites. The ITQ-6 catalysts with the opened interlayer structure presented better efficiency in ethanol to DEE conversion due to overcoming these diffusional restrictions. Moreover, selectivity to DEE over ITQ-6 was higher than in the presence of three-dimensional ferrierite. Opened porous structures of ITQ-6 and ITQ-36, are more effective in catalytic dehydration of ethanol to diethyl ether than microporous ferrierite. Surface acidity determines catalytic performance of the zeolite catalysts in alcohol dehydration.![]()
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Affiliation(s)
- Aneta Święs
- Jagiellonian University in Kraków, Faculty of Chemistry, Gronostajowa 2, 30-387 Kraków, Poland
| | - Andrzej Kowalczyk
- Jagiellonian University in Kraków, Faculty of Chemistry, Gronostajowa 2, 30-387 Kraków, Poland
| | - Barbara Gil
- Jagiellonian University in Kraków, Faculty of Chemistry, Gronostajowa 2, 30-387 Kraków, Poland
| | - Lucjan Chmielarz
- Jagiellonian University in Kraków, Faculty of Chemistry, Gronostajowa 2, 30-387 Kraków, Poland
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12
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Elias C, Fugallo G, Valvin P, L'Henoret C, Li J, Edgar JH, Sottile F, Lazzeri M, Ouerghi A, Gil B, Cassabois G. Flat Bands and Giant Light-Matter Interaction in Hexagonal Boron Nitride. Phys Rev Lett 2021; 127:137401. [PMID: 34623855 DOI: 10.1103/physrevlett.127.137401] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Accepted: 08/31/2021] [Indexed: 06/13/2023]
Abstract
Dispersionless energy bands in k space are a peculiar property gathering increasing attention for the emergence of novel electronic, magnetic, and photonic properties. Here, we explore the impact of electronic flat bands on the light-matter interaction. The van der Waals interaction between the atomic layers of hexagonal boron nitride induces flat bands along specific lines of the Brillouin zone. The macroscopic degeneracy along these lines leads to van Hove singularities with divergent joint density of states, resulting in outstanding optical properties of the excitonic states. For the direct exciton, we report a giant oscillator strength with a longitudinal-transverse splitting of 420 meV, a record value, confirmed by our ab initio calculations. For the fundamental indirect exciton, flat bands result in phonon-assisted processes of exceptional efficiency, that compete with direct absorption in reflectivity, and that make the internal quantum efficiency close to values typical of direct band gap semiconductors.
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Affiliation(s)
- C Elias
- Laboratoire Charles Coulomb UMR 5221 CNRS-Université de Montpellier, 34095 Montpellier, France
| | - G Fugallo
- LTeN UMR 6607 CNRS-PolytechNantes, Université de Nantes, 44306 Nantes, France
| | - P Valvin
- Laboratoire Charles Coulomb UMR 5221 CNRS-Université de Montpellier, 34095 Montpellier, France
| | - C L'Henoret
- Laboratoire Charles Coulomb UMR 5221 CNRS-Université de Montpellier, 34095 Montpellier, France
| | - J Li
- Tim Taylor Department of Chemical Engineering, Kansas State University, Manhattan, Kansas 66506, USA
| | - J H Edgar
- Tim Taylor Department of Chemical Engineering, Kansas State University, Manhattan, Kansas 66506, USA
| | - F Sottile
- Laboratoire des Solides Irradiés, Ecole Polytechnique, CNRS, CEA/DRF/IRAMIS, Institut Polytechnique de Paris, 91128 Palaiseau, France
| | - M Lazzeri
- Sorbonne Université, CNRS UMR 7590, MNHN, IMPMC, 75005 Paris, France
| | - A Ouerghi
- C2N CNRS-Univ Paris Sud, Université Paris-Saclay, 91120 Palaiseau, France
| | - B Gil
- Laboratoire Charles Coulomb UMR 5221 CNRS-Université de Montpellier, 34095 Montpellier, France
| | - G Cassabois
- Laboratoire Charles Coulomb UMR 5221 CNRS-Université de Montpellier, 34095 Montpellier, France
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13
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Roth WJ, Sasaki T, Wolski K, Ebina Y, Tang DM, Michiue Y, Sakai N, Ma R, Cretu O, Kikkawa J, Kimoto K, Kalahurska K, Gil B, Mazur M, Zapotoczny S, Čejka J, Grzybek J, Kowalczyk A. Exfoliated Ferrierite-Related Unilamellar Nanosheets in Solution and Their Use for Preparation of Mixed Zeolite Hierarchical Structures. J Am Chem Soc 2021; 143:11052-11062. [PMID: 34264655 PMCID: PMC8397323 DOI: 10.1021/jacs.1c04081] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Direct exfoliation of layered zeolites into solutions of monolayers has remained unresolved since the 1990s. Recently, zeolite MCM-56 with the MWW topology (layers denoted mww) has been exfoliated directly in high yield by soft-chemical treatment with tetrabutylammonium hydroxide (TBAOH). This has enabled preparation of zeolite-based hierarchical materials and intimate composites with other active species that are unimaginable via the conventional solid-state routes. The extension to other frameworks, which provides broader benefits, diversified activity, and functionality, is not routine and requires finding suitable synthesis formulations, viz. compositions and conditions, of the layered zeolites themselves. This article reports exfoliation and characterization of layers with ferrierite-related structure, denoted bifer, having rectangular lattice constants like those of the FER and CDO zeolites, and thickness of approximately 2 nm, which is twice that of the so-called fer layer. Several techniques were combined to prove the exfoliation, supported by simulations: AFM; in-plane, in situ, and powder X-ray diffraction; TEM; and SAED. The results confirmed (i) the structure and crystallinity of the layers without unequivocal differentiation between the FER and CDO topologies and (ii) uniform thickness in solution (monodispersity), ruling out significant multilayered particles and other impurities. The bifer layers are zeolitic with Brønsted acid sites, demonstrated catalytic activity in the alkylation of mesitylene with benzyl alcohol, and intralayer pores visible in TEM. The practical benefits are demonstrated by the preparation of unprecedented intimately mixed zeolite composites with the mww, with activity greater than the sum of the components despite high content of inert silica as pillars.
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Affiliation(s)
- Wieslaw J Roth
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, Kraków 30-387, Poland
| | - Takayoshi Sasaki
- International Centre for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba 305-0044, Ibaraki, Japan
| | - Karol Wolski
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, Kraków 30-387, Poland
| | - Yasuo Ebina
- International Centre for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba 305-0044, Ibaraki, Japan
| | - Dai-Ming Tang
- International Centre for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba 305-0044, Ibaraki, Japan
| | - Yuichi Michiue
- International Centre for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba 305-0044, Ibaraki, Japan
| | - Nobuyuki Sakai
- International Centre for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba 305-0044, Ibaraki, Japan
| | - Renzhi Ma
- International Centre for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba 305-0044, Ibaraki, Japan
| | - Ovidiu Cretu
- Research Center for Advanced Measurement and Characterization, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
| | - Jun Kikkawa
- Research Center for Advanced Measurement and Characterization, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
| | - Koji Kimoto
- Research Center for Advanced Measurement and Characterization, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
| | - Katarzyna Kalahurska
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, Kraków 30-387, Poland
| | - Barbara Gil
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, Kraków 30-387, Poland
| | - Michal Mazur
- Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University, Hlavova 8, Prague 2 12840, Czech Republic
| | - Szczepan Zapotoczny
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, Kraków 30-387, Poland
| | - Jiri Čejka
- Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University, Hlavova 8, Prague 2 12840, Czech Republic
| | - Justyna Grzybek
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, Kraków 30-387, Poland
| | - Andrzej Kowalczyk
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, Kraków 30-387, Poland
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14
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Engel O, Córdoba S, Arroyo M, Rodriguez N, Fernando J, de la Fuente C, Zapata I, Velasco J, Gil B, López M, Benlloch R, Hernandez M. PO-0189 The second planning-CT in a two daily fractions implant can be omitted in cervical cancer IGABT. Radiother Oncol 2021. [DOI: 10.1016/s0167-8140(21)06348-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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15
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Shamzhy M, Gil B, Opanasenko M, Roth WJ, Čejka J. MWW and MFI Frameworks as Model Layered Zeolites: Structures, Transformations, Properties, and Activity. ACS Catal 2021. [DOI: 10.1021/acscatal.0c05332] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Mariya Shamzhy
- Department of Physical and Macromolecular Chemistry, Faculty of Sciences, Charles University, Hlavova 8, 128 43 Prague 2, Czech Republic
| | - Barbara Gil
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland
| | - Maksym Opanasenko
- Department of Physical and Macromolecular Chemistry, Faculty of Sciences, Charles University, Hlavova 8, 128 43 Prague 2, Czech Republic
| | - Wieslaw J. Roth
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland
| | - Jiří Čejka
- Department of Physical and Macromolecular Chemistry, Faculty of Sciences, Charles University, Hlavova 8, 128 43 Prague 2, Czech Republic
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16
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Grzybek J, Kubů M, Roth WJ, Gil B, Čejka J, Kasneryk V. Structural transformation and chemical modifications of the unusual layered zeolite MWW form SSZ-70. Catal Today 2020. [DOI: 10.1016/j.cattod.2019.03.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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17
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Strzempek W, Korzeniowska A, Kowalczyk A, Roth WJ, Gil B. Detemplated and Pillared 2-Dimensional Zeolite ZSM-55 with Ferrierite Layer Topology as a Carrier for Drugs. Molecules 2020; 25:molecules25153501. [PMID: 32752039 PMCID: PMC7435734 DOI: 10.3390/molecules25153501] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 07/22/2020] [Accepted: 07/29/2020] [Indexed: 01/26/2023] Open
Abstract
The present studies were conducted to show the potential of 2D zeolites as effective and non-toxic carriers of drugs. Layered zeolites exhibit adjustable interlayer porosity which can be exploited for controlled drug delivery allowing detailed investigation of the drug release because the structure of the carrier is known exactly. This study was conducted with model drugs ciprofloxacin and piracetam, and ZSM-55 with ca 1 nm thick layers, in detemplated and pillared forms. The release profiles differed from the commercial, crystalline forms of drugs-the release rate increased for ciprofloxacin and decreased for piracetam. To understand the dissolution mechanisms the release data were fitted to Korsmeyer-Peppas equation, showing Fickian (for pillared) and anomalous (for detemplated sample) transport. FT-IR studies showed that strong interaction carrier-drug may be responsible for the modified, slowed down release of piracetam while better solubility and faster release of ciprofloxacin was attributed to formation of the protonated form resulting in weaker interaction with the zeolite than in the pure crystalline form. Two independent tests on L929 mice fibroblasts (ToxiLight and PrestoBlue) showed that ZSM-55, in moderate concentrations may be safely used as a carrier of drug molecules, not having negative effect on the cells viability or proliferation rate.
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18
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Korzeniowska A, Grzybek J, Kałahurska K, Kubu M, Roth WJ, Gil B. The structure-catalytic activity relationship for the transient layered zeolite MCM-56 with MWW topology. Catal Today 2020. [DOI: 10.1016/j.cattod.2019.09.044] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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19
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Roth WJ, Sasaki T, Wolski K, Song Y, Tang DM, Ebina Y, Ma R, Grzybek J, Kałahurska K, Gil B, Mazur M, Zapotoczny S, Cejka J. Liquid dispersions of zeolite monolayers with high catalytic activity prepared by soft-chemical exfoliation. Sci Adv 2020; 6:eaay8163. [PMID: 32219163 PMCID: PMC7083615 DOI: 10.1126/sciadv.aay8163] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/20/2019] [Accepted: 12/20/2019] [Indexed: 06/10/2023]
Abstract
The most effective approach to practical exploitation of the layered solids that often have unique valuable properties-such as graphene, clays, and other compounds-is by dispersion into colloidal suspensions of monolayers, called liquid exfoliation. This fundamentally expected behavior can be used to deposit monolayers on supports or to reassemble into hierarchical materials to produce, by design, catalysts, nanodevices, films, drug delivery systems, and other products. Zeolites have been known as extraordinary catalysts and sorbents with three-dimensional structures but emerged as an unexpected new class of layered solids contributing previously unknown valuable features: catalytically active layers with pores inside or across. The self-evident question of layered zeolite exfoliation has remained unresolved for three decades. Here, we report the first direct exfoliation of zeolites into suspension of monolayers as proof of the concept, which enables diverse applications including membranes and hierarchical catalysts with improved access.
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Affiliation(s)
- Wieslaw J. Roth
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland
| | - Takayoshi Sasaki
- International Centre for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Karol Wolski
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland
| | - Yeji Song
- International Centre for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Dai-Ming Tang
- International Centre for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Yasuo Ebina
- International Centre for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Renzhi Ma
- International Centre for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Justyna Grzybek
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland
| | - Katarzyna Kałahurska
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland
| | - Barbara Gil
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland
| | - Michal Mazur
- Department of Physical and Macromolecular Chemistry, Faculty of Sciences, Charles University, Hlavova 8, 128 43 Prague 2, Czech Republic
| | - Szczepan Zapotoczny
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland
| | - Jiri Cejka
- Department of Physical and Macromolecular Chemistry, Faculty of Sciences, Charles University, Hlavova 8, 128 43 Prague 2, Czech Republic
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20
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Toropov AA, Evropeitsev EA, Nestoklon MO, Smirnov DS, Shubina TV, Kaibyshev VK, Budkin GV, Jmerik VN, Nechaev DV, Rouvimov S, Ivanov SV, Gil B. Strongly Confined Excitons in GaN/AlN Nanostructures with Atomically Thin GaN Layers for Efficient Light Emission in Deep-Ultraviolet. Nano Lett 2020; 20:158-165. [PMID: 31756115 DOI: 10.1021/acs.nanolett.9b03517] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Fascinating optical properties governed by extremely confined excitons have been so far observed in 2D crystals like monolayers of transition metal dichalcogenides. These materials, however, are limited for production by epitaxial methods. Besides, they are not suitable for the development of optoelectronics for the challenging deep-ultraviolet spectral range. Here, we present a single monolayer of GaN in AlN as a heterostructure fabricated by molecular beam epitaxy, which provides extreme 2D confinement of excitons, being ideally suited for light generation in the deep-ultraviolet. Optical studies in the samples, supplemented by a group-theory analysis and first-principle calculations, make evident a giant enhancement of the splitting between the dark and bright excitons due to short-range electron-hole exchange interaction that is a fingerprint of the strongly confined excitons. The practical significance of our results is in the observation of the internal quantum yield of the room-temperature excitonic emission as high as ∼75% at 235 nm.
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Affiliation(s)
- A A Toropov
- Ioffe Institute , St. Petersburg 194021 , Russia
| | | | | | - D S Smirnov
- Ioffe Institute , St. Petersburg 194021 , Russia
| | - T V Shubina
- Ioffe Institute , St. Petersburg 194021 , Russia
| | | | - G V Budkin
- Ioffe Institute , St. Petersburg 194021 , Russia
| | - V N Jmerik
- Ioffe Institute , St. Petersburg 194021 , Russia
| | - D V Nechaev
- Ioffe Institute , St. Petersburg 194021 , Russia
| | - S Rouvimov
- University of Notre Dame , Notre Dame , Indiana 46556 , United States
| | - S V Ivanov
- Ioffe Institute , St. Petersburg 194021 , Russia
| | - B Gil
- Ioffe Institute , St. Petersburg 194021 , Russia
- Université Montpellier, L2C, UMR 5221 , 34095 Cedex 5 Montpellier , France
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21
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Jankowska A, Kowalczyk A, Rutkowska M, Mozgawa W, Gil B, Chmielarz L. Silica and silica–titania intercalated MCM-36 modified with iron as catalysts for selective reduction of nitrogen oxides – the role of associated reactions. Catal Sci Technol 2020. [DOI: 10.1039/d0cy01415j] [Citation(s) in RCA: 7] [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: 01/22/2023]
Abstract
Fe-MCM-36 zeolites are effective catalysts for high-temperature NH3-SCR – their activity is related to effective NO to NO2 oxidation over Fe2O3 species, while high N2-selectivity is attributed to dispersed Fe-species active in N2O decomposition.
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Affiliation(s)
| | | | | | - Włodzimierz Mozgawa
- AGH University of Science and Technology
- Faculty of Materials Science and Ceramics
- 30-059 Kraków
- Poland
| | - Barbara Gil
- Jagiellonian University
- Faculty of Chemistry
- 30-387 Kraków
- Poland
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22
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Wyszogrodzka-Gaweł G, Dorożyński P, Giovagnoli S, Strzempek W, Pesta E, Węglarz WP, Gil B, Menaszek E, Kulinowski P. An Inhalable Theranostic System for Local Tuberculosis Treatment Containing an Isoniazid Loaded Metal Organic Framework Fe-MIL-101-NH2-From Raw MOF to Drug Delivery System. Pharmaceutics 2019; 11:pharmaceutics11120687. [PMID: 31861138 PMCID: PMC6969914 DOI: 10.3390/pharmaceutics11120687] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2019] [Revised: 12/10/2019] [Accepted: 12/11/2019] [Indexed: 12/18/2022] Open
Abstract
The theranostic approach to local tuberculosis treatment allows drug delivery and imaging of the lungs for a better control and personalization of antibiotic therapy. Metal-organic framework (MOF) Fe-MIL-101-NH2 nanoparticles were loaded with isoniazid. To optimize their functionality a 23 factorial design of spray-drying with poly(lactide-co-glycolide) and leucine was employed. Powder aerodynamic properties were assessed using a twin stage impinger based on the dose emitted and the fine particle fraction. Magnetic resonance imaging (MRI) contrast capabilities were tested on porous lung tissue phantom and ex vivo rat lungs. Cell viability and uptake studies were conducted on murine macrophages RAW 246.9. The final product showed good aerodynamic properties, modified drug release, easier uptake by macrophages in relation to raw isoniazid-MOF, and MRI contrast capabilities. Starting from raw MOF, a fully functional inhalable theranostic system with a potential application in personalized tuberculosis pulmonary therapy was developed.
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Affiliation(s)
- Gabriela Wyszogrodzka-Gaweł
- Department of Pharmacobiology, Faculty of Pharmacy, Jagiellonian University Medical College, Medyczna 9, 30-068 Kraków, Poland; (G.W.-G.); (E.M.)
| | - Przemysław Dorożyński
- Department of Drug Technology and Pharmaceutical Biotechnology, Medical University of Warsaw, Banacha 1, 02-097 Warszawa, Poland
- Correspondence:
| | - Stefano Giovagnoli
- Department of Pharmaceutical Sciences, via del Liceo 1, University of Perugia, 06123 Perugia, Italy;
| | - Weronika Strzempek
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland; (W.S.); (B.G.)
| | - Edyta Pesta
- Department of Pharmaceutical Analysis, Research Network Łukasiewicz—Pharmaceutical Research Institute, Rydygiera 8, 01-793 Warszawa, Poland;
| | - Władysław P. Węglarz
- Department of Magnetic Resonance Imaging, Institute of Nuclear Physics, Polish Academy of Sciences, Radzikowskiego 152, 31-342 Kraków, Poland;
| | - Barbara Gil
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland; (W.S.); (B.G.)
| | - Elżbieta Menaszek
- Department of Pharmacobiology, Faculty of Pharmacy, Jagiellonian University Medical College, Medyczna 9, 30-068 Kraków, Poland; (G.W.-G.); (E.M.)
| | - Piotr Kulinowski
- Institute of Technology, Pedagogical University of Cracow, Podchorążych 2, 30-084 Kraków, Poland;
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23
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Shubina TV, Desrat W, Moret M, Tiberj A, Briot O, Davydov VY, Platonov AV, Semina MA, Gil B. InSe as a case between 3D and 2D layered crystals for excitons. Nat Commun 2019; 10:3479. [PMID: 31375686 PMCID: PMC6677765 DOI: 10.1038/s41467-019-11487-0] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Accepted: 07/17/2019] [Indexed: 11/09/2022] Open
Abstract
InSe is a promising material in many aspects where the role of excitons is decisive. Here we report the sequential appearance in its luminescence of the exciton, the biexciton, and the P-band of the exciton-exciton scattering while the excitation power increases. The strict energy and momentum conservation rules of the P-band are used to reexamine the exciton binding energy. The new value ≥20 meV is markedly higher than the currently accepted one (14 meV), being however well consistent with the robustness of the excitons up to room temperature. A peak controlled by the Sommerfeld factor is found near the bandgap (~1.36 eV). Our findings supported by theoretical calculations taking into account the anisotropic material parameters question the pure three-dimensional character of the exciton in InSe, assumed up to now. The refined character and parameters of the exciton are of paramount importance for the successful application of InSe in nanophotonics.
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Affiliation(s)
- T V Shubina
- Ioffe Institute, 26 Politekhnicheskaya, St Petersburg, 194021, Russia.
| | - W Desrat
- Laboratoire Charles Coulomb (L2C), Université de Montpellier, CNRS, Montpellier, FR-34095, France.
| | - M Moret
- Laboratoire Charles Coulomb (L2C), Université de Montpellier, CNRS, Montpellier, FR-34095, France
| | - A Tiberj
- Laboratoire Charles Coulomb (L2C), Université de Montpellier, CNRS, Montpellier, FR-34095, France
| | - O Briot
- Laboratoire Charles Coulomb (L2C), Université de Montpellier, CNRS, Montpellier, FR-34095, France
| | - V Yu Davydov
- Ioffe Institute, 26 Politekhnicheskaya, St Petersburg, 194021, Russia
| | - A V Platonov
- Ioffe Institute, 26 Politekhnicheskaya, St Petersburg, 194021, Russia
| | - M A Semina
- Ioffe Institute, 26 Politekhnicheskaya, St Petersburg, 194021, Russia
| | - B Gil
- Ioffe Institute, 26 Politekhnicheskaya, St Petersburg, 194021, Russia.,Laboratoire Charles Coulomb (L2C), Université de Montpellier, CNRS, Montpellier, FR-34095, France
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Elias C, Valvin P, Pelini T, Summerfield A, Mellor CJ, Cheng TS, Eaves L, Foxon CT, Beton PH, Novikov SV, Gil B, Cassabois G. Direct band-gap crossover in epitaxial monolayer boron nitride. Nat Commun 2019; 10:2639. [PMID: 31201328 PMCID: PMC6572751 DOI: 10.1038/s41467-019-10610-5] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Accepted: 05/22/2019] [Indexed: 12/01/2022] Open
Abstract
Hexagonal boron nitride is a large band-gap insulating material which complements the electronic and optical properties of graphene and the transition metal dichalcogenides. However, the intrinsic optical properties of monolayer boron nitride remain largely unexplored. In particular, the theoretically expected crossover to a direct-gap in the limit of the single monolayer is presently not confirmed experimentally. Here, in contrast to the technique of exfoliating few-layer 2D hexagonal boron nitride, we exploit the scalable approach of high-temperature molecular beam epitaxy to grow high-quality monolayer boron nitride on graphite substrates. We combine deep-ultraviolet photoluminescence and reflectance spectroscopy with atomic force microscopy to reveal the presence of a direct gap of energy 6.1 eV in the single atomic layers, thus confirming a crossover to direct gap in the monolayer limit.
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Affiliation(s)
- C Elias
- Laboratoire Charles Coulomb, UMR5221 CNRS-Université de Montpellier, 34095, Montpellier, France
| | - P Valvin
- Laboratoire Charles Coulomb, UMR5221 CNRS-Université de Montpellier, 34095, Montpellier, France
| | - T Pelini
- Laboratoire Charles Coulomb, UMR5221 CNRS-Université de Montpellier, 34095, Montpellier, France
| | - A Summerfield
- School of Physics and Astronomy, University of Nottingham, Nottingham, NG7 2RD, UK
| | - C J Mellor
- School of Physics and Astronomy, University of Nottingham, Nottingham, NG7 2RD, UK
| | - T S Cheng
- School of Physics and Astronomy, University of Nottingham, Nottingham, NG7 2RD, UK
| | - L Eaves
- School of Physics and Astronomy, University of Nottingham, Nottingham, NG7 2RD, UK
| | - C T Foxon
- School of Physics and Astronomy, University of Nottingham, Nottingham, NG7 2RD, UK
| | - P H Beton
- School of Physics and Astronomy, University of Nottingham, Nottingham, NG7 2RD, UK
| | - S V Novikov
- School of Physics and Astronomy, University of Nottingham, Nottingham, NG7 2RD, UK
| | - B Gil
- Laboratoire Charles Coulomb, UMR5221 CNRS-Université de Montpellier, 34095, Montpellier, France
| | - G Cassabois
- Laboratoire Charles Coulomb, UMR5221 CNRS-Université de Montpellier, 34095, Montpellier, France.
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Madej K, Jonda A, Borcuch A, Piekoszewski W, Chmielarz L, Gil B. A novel stir bar sorptive-dispersive microextraction in combination with magnetically modified graphene for isolation of seven pesticides from water samples. Microchem J 2019. [DOI: 10.1016/j.microc.2019.04.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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Boroń P, Rutkowska M, Gil B, Marszałek B, Chmielarz L, Dzwigaj S. Experimental Evidence of the Mechanism of Selective Catalytic Reduction of NO with NH 3 over Fe-Containing BEA Zeolites. ChemSusChem 2019; 12:692-705. [PMID: 30328281 DOI: 10.1002/cssc.201801883] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2018] [Revised: 09/15/2018] [Accepted: 09/18/2018] [Indexed: 06/08/2023]
Abstract
Various temperature-programmed techniques were used as tools in mechanistic studies of selective catalytic reduction (SCR) of NO with ammonia in the presence of Fe-containing BEA zeolites. Moreover, FTIR studies of adsorbed NH3 and NO were conducted to determine the interactions of reactants with the catalyst surface. Iron was introduced into BEA zeolite by three different methods: i) two-step post-synthesis; ii) conventional wet impregnation; iii) ion exchange. The catalytic activity was dependent on the method used for iron introduction. The reactivities of NH3 and NO adsorbed on iron-modified zeolites obtained by impregnation and ion-exchange methods were higher than those measured for the catalyst obtained by a two-step post-synthesis method. The activity of Fe-containing zeolites in SCR was related to the form of deposited iron species, as well as to the nature, strength, and concentration of acid sites. Possible reaction pathways of NO reduction over the FeBEA zeolite catalysts were presented and discussed.
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Affiliation(s)
- Paweł Boroń
- Faculty of Chemistry, Jagiellonian University in Kraków, Gronostajowa 2, 30-387, Kraków, Poland
- Laboratoire de Réactivité de Surface, Sorbonne Université-CNRS, UMR 7197, 75005, Paris, France
| | - Małgorzata Rutkowska
- Faculty of Chemistry, Jagiellonian University in Kraków, Gronostajowa 2, 30-387, Kraków, Poland
| | - Barbara Gil
- Faculty of Chemistry, Jagiellonian University in Kraków, Gronostajowa 2, 30-387, Kraków, Poland
| | - Bartosz Marszałek
- Faculty of Chemistry, Jagiellonian University in Kraków, Gronostajowa 2, 30-387, Kraków, Poland
| | - Lucjan Chmielarz
- Faculty of Chemistry, Jagiellonian University in Kraków, Gronostajowa 2, 30-387, Kraków, Poland
| | - Stanislaw Dzwigaj
- Laboratoire de Réactivité de Surface, Sorbonne Université-CNRS, UMR 7197, 75005, Paris, France
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Korzeniowska A, Grzybek J, Roth WJ, Kowalczyk A, Michorczyk P, Čejka J, Přech J, Gil B. Incorporation of Ti as a Pyramidal Framework Site in the Mono‐Layered MCM‐56 Zeolite and its Oxidation Activity. ChemCatChem 2018. [DOI: 10.1002/cctc.201800981] [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: 11/10/2022]
Affiliation(s)
| | - Justyna Grzybek
- Faculty of ChemistryJagiellonian University Gronostajowa 2 Kraków 30-397 Poland
| | - Wieslaw J. Roth
- Faculty of ChemistryJagiellonian University Gronostajowa 2 Kraków 30-397 Poland
| | - Andrzej Kowalczyk
- Faculty of ChemistryJagiellonian University Gronostajowa 2 Kraków 30-397 Poland
| | - Piotr Michorczyk
- Faculty of Chemical Engineering and TechnologyCracow University of Technology Warszawska 24 Kraków 31-155 Poland
| | - Jiři Čejka
- Institute of Physical ChemistryAcademy of Sciences of the Czech Republic, v.v.i. Dolejškova 2155/3 Prague 8 182 23 Czech Republic
- Department of Physical and Macromolecular Chemistry Faculty of ScienceCharles University Hlavova 8 Prague 2 128 43 Czech Republic
| | - Jan Přech
- Department of Physical and Macromolecular Chemistry Faculty of ScienceCharles University Hlavova 8 Prague 2 128 43 Czech Republic
| | - Barbara Gil
- Faculty of ChemistryJagiellonian University Gronostajowa 2 Kraków 30-397 Poland
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Wyszogrodzka G, Dorożyński P, Gil B, Roth WJ, Strzempek M, Marszałek B, Węglarz WP, Menaszek E, Strzempek W, Kulinowski P. Iron-Based Metal-Organic Frameworks as a Theranostic Carrier for Local Tuberculosis Therapy. Pharm Res 2018; 35:144. [PMID: 29777389 PMCID: PMC5960001 DOI: 10.1007/s11095-018-2425-2] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2018] [Accepted: 05/03/2018] [Indexed: 11/13/2022]
Abstract
PURPOSE The purpose of the study was initial evaluation of applicability of metal organic framework (MOF) Fe-MIL-101-NH2 as a theranostic carrier of antituberculous drug in terms of its functionality, i.e. drug loading, drug dissolution, magnetic resonance imaging (MRI) contrast and cytotoxic safety. METHODS Fe-MIL-101-NH2 was characterized using X-ray powder diffraction, FTIR spectrometry and scanning electron microscopy. The particle size analysis was determined using laser diffraction. Magnetic resonance relaxometry and MRI were carried out on phantoms of the MOF system suspended in polymer solution. Drug dissolution studies were conducted using Franz cells. For MOF cytotoxicity, commercially available fibroblasts L929 were cultured in Eagle's Minimum Essential Medium supplemented with 10% fetal bovine serum. RESULTS MOF particles were loaded with 12% of isoniazid. The particle size (3.37-6.45 μm) depended on the micronization method used. The proposed drug delivery system can also serve as the MRI contrast agent. The drug dissolution showed extended release of isoniazid. MOF particles accumulated in the L929 fibroblast cytoplasmic area, suggesting MOF release the drug inside the cells. The cytotoxicity confirmed safety of MOF system. CONCLUSIONS The application of MOF for extended release inhalable system proposes the novel strategy for delivery of standard antimycobacterial agents combined with monitoring of their distribution within the lung tissue.
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Affiliation(s)
- Gabriela Wyszogrodzka
- Faculty of Pharmacy, Department of Pharmacobiology, Jagiellonian University Medical College, Medyczna 9, 30-068, Kraków, Poland
| | | | - Barbara Gil
- Faculty of Chemistry, Jagiellonian University in Kraków, Gronostajowa 2, 30-387, Kraków, Poland
| | - Wieslaw J Roth
- Faculty of Chemistry, Jagiellonian University in Kraków, Gronostajowa 2, 30-387, Kraków, Poland
| | - Maciej Strzempek
- Faculty of Chemistry, Jagiellonian University in Kraków, Gronostajowa 2, 30-387, Kraków, Poland
| | - Bartosz Marszałek
- Faculty of Chemistry, Jagiellonian University in Kraków, Gronostajowa 2, 30-387, Kraków, Poland
| | - Władysław P Węglarz
- Department of Magnetic Resonance Imaging, Institute of Nuclear Physics, Polish Academy of Sciences, Radzikowskiego 152, 31-342, Kraków, Poland
| | - Elżbieta Menaszek
- Faculty of Pharmacy, Department of Cytobiology, Jagiellonian University Medical College, Medyczna 9, 30-068, Kraków, Poland
| | - Weronika Strzempek
- Faculty of Chemistry, Jagiellonian University in Kraków, Gronostajowa 2, 30-387, Kraków, Poland
| | - Piotr Kulinowski
- Faculty of Mathematics, Physics and Technical Science, Institute of Technology, Pedagogical University of Cracow, Podchorążych 2, 30-084, Kraków, Poland
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Grzybek J, Gil B, Roth WJ, Skoczek M, Kowalczyk A, Chmielarz L. Characterization of Co and Fe-MCM-56 catalysts for NH 3-SCR and N 2O decomposition: An in situ FTIR study. Spectrochim Acta A Mol Biomol Spectrosc 2018; 196:281-288. [PMID: 29459158 DOI: 10.1016/j.saa.2018.02.033] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Revised: 01/24/2018] [Accepted: 02/10/2018] [Indexed: 06/08/2023]
Abstract
Two-step preparation of iron and cobalt-containing MCM-56 zeolites has been undertaken to evaluate the influence of their physicochemical properties in the selective catalytic reduction (NH3-SCR or DeNOx) of NO using NH3 as a reductant. Zeolites were prepared by the selective leaching of the framework cations by concentrated HNO3 solution and NH4F/HF mixture and consecutively, introduction of Co and Fe heteroatoms, in quantities below 1wt%. Further calcination allowed to obtain highly dispersed active species. Their evaluation and speciation was realized by adsorption of pyridine and NO, followed by FTIR spectroscopy. Both Fe-MCM-56 zeolites showed excellent activities (maximum NO conversion 92%) with high selectivity to dinitrogen (above 99%) in the high temperature NH3-SCR process. High catalytic activity of Fe-MCM-56 zeolites was assigned to the formation of stable nitrates, delivering NO to react with NH3 at higher temperatures and suppressing the direct NO oxidation. It was found that more nitrates was formed in Fe-MCM-56 (HNO3) than in Fe-MCM-56 (HF/NH4F) and that could compensate for the lower Fe loading, resulting in very similar catalytic activity of both catalysts. At the same time both Co-and Fe-MCM-56 zeolites were moderately active in direct N2O decomposition, with maximum N2O conversion not higher than 80% and activity window starting at 500°C. This phenomenon was expected since both types of catalysts contained well dispersed active centers, not beneficial for this reaction.
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Affiliation(s)
- Justyna Grzybek
- Faculty of Chemistry, Jagiellonian University in Kraków, Gronostajowa 2, 30-387 Kraków, Poland
| | - Barbara Gil
- Faculty of Chemistry, Jagiellonian University in Kraków, Gronostajowa 2, 30-387 Kraków, Poland.
| | - Wieslaw J Roth
- Faculty of Chemistry, Jagiellonian University in Kraków, Gronostajowa 2, 30-387 Kraków, Poland
| | - Monika Skoczek
- Faculty of Chemistry, Jagiellonian University in Kraków, Gronostajowa 2, 30-387 Kraków, Poland
| | - Andrzej Kowalczyk
- Faculty of Chemistry, Jagiellonian University in Kraków, Gronostajowa 2, 30-387 Kraków, Poland
| | - Lucjan Chmielarz
- Faculty of Chemistry, Jagiellonian University in Kraków, Gronostajowa 2, 30-387 Kraków, Poland
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Gil B, Roth WJ, Grzybek J, Korzeniowska A, Olejniczak Z, Eliáš M, Opanasenko M, Čejka J. The effect of hot liquid water treatment on the properties and catalytic activity of MWW zeolites with various layered structures. Catal Today 2018. [DOI: 10.1016/j.cattod.2017.10.021] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [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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Roth WJ, Gil B, Mayoral A, Grzybek J, Korzeniowska A, Kubu M, Makowski W, Čejka J, Olejniczak Z, Mazur M. Pillaring of layered zeolite precursors with ferrierite topology leading to unusual molecular sieves on the micro/mesoporous border. Dalton Trans 2018; 47:3029-3037. [PMID: 29485158 DOI: 10.1039/c7dt03718j] [Citation(s) in RCA: 11] [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: 11/21/2022]
Abstract
Layered zeolite materials with FER layer topology can produce various condensed and expanded structures including zeolite frameworks, FER and CDO, their interlayer expanded forms (IEZ), and organic-intercalated and pillared derivatives. This work concerns pillaring of the surfactant-swollen derivative with a gallery height of ca. 2.5 nm between layers by treatment with tetraethylorthosilicate (TEOS) at room and elevated temperatures. The materials obtained at 100 °C and higher showed unusual properties including 2 nm pores on the micro/mesoporous border and disordered layer packing indicated by the absence of distinct low angle interlayer peaks at d-spacing >3 nm (∼3° 2θ Cu Kα radiation) in the X-ray diffraction pattern (XRD). TEOS treatment at room temperature produced a pillared molecular sieve with the expected mesoporous characteristics, namely a pore size of around 3 nm and a high intensity low angle (001) peak at 2.3° 2θ, and a d-spacing of 3.8 nm, in the XRD. The characterization aiming to elucidate the nature of the obtained unusual products included gas adsorption isotherms, aberration corrected (Cs-corrected) Scanning Transmission Electron Microscopy (STEM) studies and 29Si solid state NMR. BET surface area values decreased with the temperature of TEOS treatment from approximately 1200 m2 g-1 to ∼900 and 600 m2 g-1, at room temperature, 100 °C, and 120 °C, respectively. The 29Si solid state NMR revealed the presence of both Q3 ((SiO)3SiOX, X = H or minus charge) and Q4 ((SiO)4Si) centers giving separated signals up to the pillaring step. After pillaring at 100 °C and calcination, the nominal intensity ratios Q4 : Q3 were 2.17 and 2.61 but the signals were merged into one broad peak indicating the structural heterogeneity of Si-O coordination. The microscopy showed the presence of FER layers in the samples but the overall structure and composition were not well-defined. The observed unusual disorganization and possible partial degradation of layers during pillaring may result from the combination of high temperature, alkalinity (surfactant hydroxide) and siliceous composition of the layers. The obtained pillared products are of interest for the preparation of larger pore catalysts and sorbents or controlled drug delivery.
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Affiliation(s)
- Wieslaw J Roth
- Faculty of Chemistry, Jagiellonian University in Kraków, Gronostajowa 2, 30-387 Kraków, Poland.
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Vuong TQP, Liu S, Van der Lee A, Cuscó R, Artús L, Michel T, Valvin P, Edgar JH, Cassabois G, Gil B. Isotope engineering of van der Waals interactions in hexagonal boron nitride. Nat Mater 2018; 17:152-158. [PMID: 29251722 DOI: 10.1038/nmat5048] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2017] [Accepted: 11/01/2017] [Indexed: 05/28/2023]
Abstract
Hexagonal boron nitride is a model lamellar compound where weak, non-local van der Waals interactions ensure the vertical stacking of two-dimensional honeycomb lattices made of strongly bound boron and nitrogen atoms. We study the isotope engineering of lamellar compounds by synthesizing hexagonal boron nitride crystals with nearly pure boron isotopes (10B and 11B) compared to those with the natural distribution of boron (20 at% 10B and 80 at% 11B). On the one hand, as with standard semiconductors, both the phonon energy and electronic bandgap varied with the boron isotope mass, the latter due to the quantum effect of zero-point renormalization. On the other hand, temperature-dependent experiments focusing on the shear and breathing motions of adjacent layers revealed the specificity of isotope engineering in a layered material, with a modification of the van der Waals interactions upon isotope purification. The electron density distribution is more diffuse between adjacent layers in 10BN than in 11BN crystals. Our results open perspectives in understanding and controlling van der Waals bonding in layered materials.
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Affiliation(s)
- T Q P Vuong
- Laboratoire Charles Coulomb (L2C), Université de Montpellier, CNRS, 34095 Montpellier, France
| | - S Liu
- Department of Chemical Engineering, Kansas State University, Manhattan, Kansas 66506, USA
| | - A Van der Lee
- Institut Européen des Membranes, UMR 5635 CNRS-Univ. Montpellier-ENSCM, 34095 Montpellier, France
| | - R Cuscó
- Institut Jaume Almera, Consejo Superior de Investigaciones Científicas (ICTJA-CSIC), 08028 Barcelona, Spain
| | - L Artús
- Institut Jaume Almera, Consejo Superior de Investigaciones Científicas (ICTJA-CSIC), 08028 Barcelona, Spain
| | - T Michel
- Laboratoire Charles Coulomb (L2C), Université de Montpellier, CNRS, 34095 Montpellier, France
| | - P Valvin
- Laboratoire Charles Coulomb (L2C), Université de Montpellier, CNRS, 34095 Montpellier, France
| | - J H Edgar
- Department of Chemical Engineering, Kansas State University, Manhattan, Kansas 66506, USA
| | - G Cassabois
- Laboratoire Charles Coulomb (L2C), Université de Montpellier, CNRS, 34095 Montpellier, France
| | - B Gil
- Laboratoire Charles Coulomb (L2C), Université de Montpellier, CNRS, 34095 Montpellier, France
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Chery N, Ngo TH, Chauvat MP, Damilano B, Courville A, DE Mierry P, Grieb T, Mehrtens T, Krause FF, Müller-Caspary K, Schowalter M, Gil B, Rosenauer A, Ruterana P. The microstructure, local indium composition and photoluminescence in green-emitting InGaN/GaN quantum wells. J Microsc 2017; 268:305-312. [PMID: 29023712 DOI: 10.1111/jmi.12657] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [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: 06/27/2017] [Revised: 09/19/2017] [Accepted: 09/19/2017] [Indexed: 11/26/2022]
Abstract
In this work, we analyse the microstructure and local chemical composition of green-emitting Inx Ga1-x N/GaN quantum well (QW) heterostructures in correlation with their emission properties. Two samples of high structural quality grown by metalorganic vapour phase epitaxy (MOVPE) with a nominal composition of x = 0.15 and 0.18 indium are discussed. The local indium composition is quantitatively evaluated by comparing scanning transmission electron microscopy (STEM) images to simulations and the local indium concentration is extracted from intensity measurements. The calculations point out that the measured indium fluctuations may be correlated to the large width and intensity decrease of the PL emission peak.
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Affiliation(s)
- N Chery
- CIMAP, 6 Boulevard du Maréchal Juin, Caen, France
| | - T H Ngo
- Laboratoire Charles Coulomb, Batiment 21, Campus Triolet, Université de Montpellier, Montpellier, France
| | - M P Chauvat
- CIMAP, 6 Boulevard du Maréchal Juin, Caen, France
| | - B Damilano
- Université Côte d'Azur, CRHEA, CNRS, France
| | | | | | - T Grieb
- Institut für Festkörperphysik, Universität Bremen, Otto-Hahn-Allee 1, Bremen, Germany
| | - T Mehrtens
- Institut für Festkörperphysik, Universität Bremen, Otto-Hahn-Allee 1, Bremen, Germany
| | - F F Krause
- Institut für Festkörperphysik, Universität Bremen, Otto-Hahn-Allee 1, Bremen, Germany
| | - K Müller-Caspary
- Institut für Festkörperphysik, Universität Bremen, Otto-Hahn-Allee 1, Bremen, Germany
| | - M Schowalter
- Institut für Festkörperphysik, Universität Bremen, Otto-Hahn-Allee 1, Bremen, Germany
| | - B Gil
- Laboratoire Charles Coulomb, Batiment 21, Campus Triolet, Université de Montpellier, Montpellier, France
| | - A Rosenauer
- Institut für Festkörperphysik, Universität Bremen, Otto-Hahn-Allee 1, Bremen, Germany
| | - P Ruterana
- CIMAP, 6 Boulevard du Maréchal Juin, Caen, France
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Abstract
Many chemical compositions produce layered solids consisting of extended sheets with thickness not greater than a few nanometers. The layers are weakly bonded together in a crystal and can be modified into various nanoarchitectures including porous hierarchical structures. Several classes of 2-dimensional (2D) materials have been extensively studied and developed because of their potential usefulness as catalysts and sorbents. They are discussed in this review with focus on clays, layered transition metal oxides, silicates, layered double hydroxides, metal(iv) phosphates and phosphonates, especially zirconium, and zeolites. Pillaring and delamination are the primary methods for structural modification and pore tailoring. The reported approaches are described and compared for the different classes of materials. The methods of characterization include identification by X-ray diffraction and microscopy, pore size analysis and activity assessment by IR spectroscopy and catalytic testing. The discovery of layered zeolites was a fundamental breakthrough that created unprecedented opportunities because of (i) inherent strong acid sites that make them very active catalytically, (ii) porosity through the layers and (iii) bridging of 2D and 3D structures. Approximately 16 different types of layered zeolite structures and modifications have been identified as distinct forms. It is also expected that many among the over 200 recognized zeolite frameworks can produce layered precursors. Additional advances enabled by 2D zeolites include synthesis of layered materials by design, hierarchical structures obtained by direct synthesis and top-down preparation of layered materials from 3D frameworks.
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Affiliation(s)
- Wieslaw J Roth
- Faculty of Chemistry, Jagiellonian University in Kraków, ul. Ingardena 3, 30-060 Kraków, Poland.
| | - Barbara Gil
- Faculty of Chemistry, Jagiellonian University in Kraków, ul. Ingardena 3, 30-060 Kraków, Poland.
| | - Wacław Makowski
- Faculty of Chemistry, Jagiellonian University in Kraków, ul. Ingardena 3, 30-060 Kraków, Poland.
| | - Bartosz Marszalek
- Faculty of Chemistry, Jagiellonian University in Kraków, ul. Ingardena 3, 30-060 Kraków, Poland.
| | - Pavla Eliášová
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejškova 2155/3, 182 23 Prague 8, Czech Republic
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Liao Y, Berghoff AS, Osswald M, Ilhan-Mutlu A, Gil B, Thome C, Ratliff M, Steeg P, Wick W, Winkler F. OS7.1 Identification and characterization of brain metastasis initiating cells. Neuro Oncol 2016. [DOI: 10.1093/neuonc/now188.051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Vuong TQP, Cassabois G, Valvin P, Ouerghi A, Chassagneux Y, Voisin C, Gil B. Phonon-Photon Mapping in a Color Center in Hexagonal Boron Nitride. Phys Rev Lett 2016; 117:097402. [PMID: 27610882 DOI: 10.1103/physrevlett.117.097402] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Indexed: 05/05/2023]
Abstract
We report on the ultraviolet optical response of a color center in hexagonal boron nitride. We demonstrate a mapping between the vibronic spectrum of the color center and the phonon dispersion in hexagonal boron nitride, with a striking suppression of the phonon assisted emission signal at the energy of the phonon gap. By means of nonperturbative calculations of the electron-phonon interaction in a strongly anisotropic phonon dispersion, we reach a quantitative interpretation of the acoustic phonon sidebands from cryogenic temperatures up to room temperature. Our analysis provides an original method for estimating the spatial extension of the electronic wave function in a point defect.
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Affiliation(s)
- T Q P Vuong
- Laboratoire Charles Coulomb, UMR 5221 CNRS-Université de Montpellier, 34095 Montpellier, France
| | - G Cassabois
- Laboratoire Charles Coulomb, UMR 5221 CNRS-Université de Montpellier, 34095 Montpellier, France
| | - P Valvin
- Laboratoire Charles Coulomb, UMR 5221 CNRS-Université de Montpellier, 34095 Montpellier, France
| | - A Ouerghi
- Laboratoire de Photonique et de Nanostructures (CNRS-LPN), Route de Nozay, 91460 Marcoussis, France
| | - Y Chassagneux
- Laboratoire Pierre Aigrain, Ecole Normale Supérieure, Université Paris Diderot, UPMC, CNRS UMR8551, 24 rue Lhomond, 75005 Paris, France
| | - C Voisin
- Laboratoire Pierre Aigrain, Ecole Normale Supérieure, Université Paris Diderot, UPMC, CNRS UMR8551, 24 rue Lhomond, 75005 Paris, France
| | - B Gil
- Laboratoire Charles Coulomb, UMR 5221 CNRS-Université de Montpellier, 34095 Montpellier, France
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Rodriguez Gonzalez V, Perez-Regadera J, Lora D, Campos A, Chavez C, Gil B, Prados R, Colmenero M. EP-1315: Abdominopelvic Radiotherapy for advanced endometrial cancer after surgery and chemotherapy: results. Radiother Oncol 2016. [DOI: 10.1016/s0167-8140(16)32565-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Roth WJ, Gil B, Makowski W, Sławek A, Korzeniowska A, Grzybek J, Siwek M, Michorczyk P. Framework-substituted cerium MCM-22 zeolite and its interlayer expanded derivative MWW-IEZ. Catal Sci Technol 2016. [DOI: 10.1039/c5cy02074c] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [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
Framework-substituted MCM-22 with up to 5% Ce was prepared by a conventional non-TEOS-based method.
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Affiliation(s)
- Wieslaw J. Roth
- Faculty of Chemistry
- Jagiellonian University in Kraków
- 30-060 Kraków
- Poland
| | - Barbara Gil
- Faculty of Chemistry
- Jagiellonian University in Kraków
- 30-060 Kraków
- Poland
| | - Wacław Makowski
- Faculty of Chemistry
- Jagiellonian University in Kraków
- 30-060 Kraków
- Poland
| | - Andrzej Sławek
- Faculty of Chemistry
- Jagiellonian University in Kraków
- 30-060 Kraków
- Poland
| | | | - Justyna Grzybek
- Faculty of Chemistry
- Jagiellonian University in Kraków
- 30-060 Kraków
- Poland
| | - Michał Siwek
- Faculty of Chemistry
- Jagiellonian University in Kraków
- 30-060 Kraków
- Poland
| | - Piotr Michorczyk
- Faculty of Chemical Engineering and Technology
- Cracow University of Technology
- 31-155 Kraków
- Poland
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Rebollo S, Jiménez R, Ortín A, Andreu E, Gil B, López MA, Royo-Villanova M, Capilla L, Rodríguez JJ, Martínez-Pellús A. Impact of implementation of a ventilator-associated pneumonia prevention bundle that includes selective digestive decontamination in a southern region of Spain. Intensive Care Med Exp 2015. [PMCID: PMC4796212 DOI: 10.1186/2197-425x-3-s1-a705] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Van de Voorde B, Hezinová M, Lannoeye J, Vandekerkhove A, Marszalek B, Gil B, Beurroies I, Nachtigall P, De Vos D. Adsorptive desulfurization with CPO-27/MOF-74: an experimental and computational investigation. Phys Chem Chem Phys 2015; 17:10759-66. [DOI: 10.1039/c5cp01063b] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
By combining experimental adsorption isotherms, microcalorimetric data, infrared spectroscopy and quantum chemical calculations the adsorption behaviour of the CPO-27/MOF-74 series (Ni, Co, Mg, Cu, and Zn) in the desulfurization of fuels is evaluated.
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Affiliation(s)
- Ben Van de Voorde
- Centre for Surface Chemistry and Catalysis (COK)
- KU Leuven
- B-3001 Leuven
- Belgium
| | - Markéta Hezinová
- Department of Physical and Macromolecular Chemistry
- Faculty of Science
- Charles University in Prague
- 128 43 Prague
- Czech Republic
| | - Jeroen Lannoeye
- Centre for Surface Chemistry and Catalysis (COK)
- KU Leuven
- B-3001 Leuven
- Belgium
| | | | | | - Barbara Gil
- Faculty of Chemistry
- Jagiellonian University
- 30-060 Kraków
- Poland
| | - Isabelle Beurroies
- CNRS
- Lab. Chimie Provence
- Madirel
- Université Aix-Marseille
- F-13397 Marseille 20
| | - Petr Nachtigall
- Department of Physical and Macromolecular Chemistry
- Faculty of Science
- Charles University in Prague
- 128 43 Prague
- Czech Republic
| | - Dirk De Vos
- Centre for Surface Chemistry and Catalysis (COK)
- KU Leuven
- B-3001 Leuven
- Belgium
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Boroń P, Chmielarz L, Gurgul J, Łątka K, Gil B, Krafft JM, Dzwigaj S. The influence of the preparation procedures on the catalytic activity of Fe-BEA zeolites in SCR of NO with ammonia and N2O decomposition. Catal Today 2014. [DOI: 10.1016/j.cattod.2014.03.018] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Canoll P, Sims P, Gil B, Pisapia D, Malone H, Goldstein H, Lei L, Sonabend A, Yun J, Samanamud J, Sims J, Teich A, Sheth S, McKhann G, Sisti M, Bruce J. IMAGE GUIDED RNA-SEQ REVEALS SUBTYPE-SPECIFIC PATTERNS AT THE INFILTRATIVE MARGINS OF GLIOBLASTOMA. Neuro Oncol 2014. [DOI: 10.1093/neuonc/nou206.34] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Gil B, Makowski W, Marszalek B, J. Roth W, Kubu M, Čejka J, Olejniczak Z. High acidity unilamellar zeolite MCM-56 and its pillared and delaminated derivatives. Dalton Trans 2014; 43:10501-11. [DOI: 10.1039/c4dt00130c] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [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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45
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Makowski W, Mlekodaj K, Gil B, Roth WJ, Marszałek B, Kubu M, Hudec P, Smiešková A, Horňáček M. Application of quasi-equilibrated thermodesorption of linear and di-branched paraffin molecules for detailed porosity characterization of the mono-layered zeolite MCM-56, in comparison with MCM-22 and ZSM-5. Dalton Trans 2014; 43:10574-83. [DOI: 10.1039/c4dt00232f] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [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
Thermodesorption of 2,2-dimethyloctane reveals different content of subsurface micropores in MWW-type zeolites.
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Affiliation(s)
- Wacław Makowski
- Faculty of Chemistry
- Jagiellonian University
- 30-060 Kraków, Poland
| | - Kinga Mlekodaj
- Faculty of Chemistry
- Jagiellonian University
- 30-060 Kraków, Poland
| | - Barbara Gil
- Faculty of Chemistry
- Jagiellonian University
- 30-060 Kraków, Poland
| | - Wiesław J. Roth
- Faculty of Chemistry
- Jagiellonian University
- 30-060 Kraków, Poland
- J. Heyrovský Institute of Physical Chemistry
- Academy of Sciences of the Czech Republic
| | | | - Martin Kubu
- J. Heyrovský Institute of Physical Chemistry
- Academy of Sciences of the Czech Republic
- 182 23 Prague, Czech Republic
| | - Pavol Hudec
- Faculty of Chemical and Food Technology
- Slovak University of Technology
- 812 37 Bratislava, Slovak Republic
| | - Agáta Smiešková
- Faculty of Chemical and Food Technology
- Slovak University of Technology
- 812 37 Bratislava, Slovak Republic
| | - Michal Horňáček
- Faculty of Chemical and Food Technology
- Slovak University of Technology
- 812 37 Bratislava, Slovak Republic
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Matoga D, Gil B, Nitek W, Todd AD, Bielawski CW. Dynamic 2D manganese(ii) isonicotinate framework with reversible crystal-to-amorphous transformation and selective guest adsorption. CrystEngComm 2014. [DOI: 10.1039/c4ce00647j] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [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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Reguant F, Martínez E, Gil B, Prieto JC, del Milagro Jiménez L, Arnau A, Bosch J. [Hip fracture, antiplatelet drugs treatment and postoperative complications]. Rev Esp Anestesiol Reanim 2013; 60:504-510. [PMID: 23890876 DOI: 10.1016/j.redar.2013.06.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2013] [Revised: 05/30/2013] [Accepted: 06/06/2013] [Indexed: 06/02/2023]
Abstract
OBJECTIVES To assess the incidence of postoperative complications, blood transfusions and survival at one month, in the old patients operated for hip fracture undergoing chronic treatment with antiplatelet drugs. MATERIAL AND METHODS Two hundred twenty three patients operated for hip fracture were studied retrospectively, separated into 3 groups: patients who received acetylsalicylic acid (group I), patients who were given 100mg/day of acetylsalicylic acid or 300mg/day of triflusal (group II) and patients receiving>100mg/day of acetylsalicylic acid, or>300mg/day of triflusal or thienopyridines (group III). Surgery was delayed for 4 days in patients in group III. Demographic, biological, clinical and treatment characteristics, postoperative complications and survival at one month were recorded. RESULTS Patients in group III were older and sustain worse general health status. Patients with a higher transfusion requirement were those of group II (73.8%) (P=0.192), who also showed a higher percentage of anaemia on admission. Severe cardiovascular complications were experienced by 5.4% of group III patients, 4.8% of group II patients and 2.1% of group I patients. Patients from group III presented a significant amount of respiratory complications (P=0.007). CONCLUSIONS Our results suggest that delaying surgery for 4 days in patients treated with clopidogrel can be associated to an increase in postoperative respiratory complications and severe adverse cardiovascular events, without increasing the tranfusional index, hospital stay, mortality, and without complications related to neuraxial anaesthesia.
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Affiliation(s)
- F Reguant
- Servicio de Anestesiología, Reanimación y Terapéutica del Dolor, Althaia Xarxa Assistencial Universitària de Manresa, Manresa, Barcelona, España.
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Vaesen S, Guillerm V, Yang Q, Wiersum AD, Marszalek B, Gil B, Vimont A, Daturi M, Devic T, Llewellyn PL, Serre C, Maurin G, De Weireld G. A robust amino-functionalized titanium(iv) based MOF for improved separation of acid gases. Chem Commun (Camb) 2013; 49:10082-4. [DOI: 10.1039/c3cc45828h] [Citation(s) in RCA: 123] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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Rojas S, Wheatley PS, Quartapelle-Procopio E, Gil B, Marszalek B, Morris RE, Barea E. Metal–organic frameworks as potential multi-carriers of drugs. CrystEngComm 2013. [DOI: 10.1039/c3ce41289j] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [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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50
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Ochońska J, McClymont D, Jodłowski P, Knapik A, Gil B, Makowski W, Łasocha W, Kołodziej A, Kolaczkowski S, Łojewska J. Copper exchanged ultrastable zeolite Y – A catalyst for NH3-SCR of NOx from stationary biogas engines. Catal Today 2012. [DOI: 10.1016/j.cattod.2012.06.010] [Citation(s) in RCA: 26] [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: 10/28/2022]
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