1
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Pan L, Ye S, Xv X, Lin P, Huang R, Wang D. Zeolite-Encaged Luminescent Silver Nanoclusters. MATERIALS (BASEL, SWITZERLAND) 2023; 16:ma16103736. [PMID: 37241363 DOI: 10.3390/ma16103736] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Revised: 05/10/2023] [Accepted: 05/10/2023] [Indexed: 05/28/2023]
Abstract
Silver nanoclusters (Ag NCs) are nanoscale aggregates that possess molecular-like discrete energy levels, resulting in electronic configuration-dependent tunable luminescence spanning the entire visible range. Benefiting from the efficient ion exchange capacity, nanometer dimensional cages, and high thermal and chemical stabilities, zeolites have been employed as desirable inorganic matrices to disperse and stabilize Ag NCs. This paper reviewed the recent research progresses on the luminescence properties, spectral manipulation, as well as the theoretical modelling of electronic structure and optical transition of Ag NCs confined inside various zeolites with different topology structures. Furthermore, potential applications of the zeolite-encaged luminescent Ag NCs in lighting, gas monitoring and sensing were presented. This review concludes with a brief comment on the possible future directions in the study of zeolite-encaged luminescent Ag NCs.
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Affiliation(s)
- Ling Pan
- School of Materials Science and Engineering, Tongji University, Shanghai 201804, China
| | - Song Ye
- School of Materials Science and Engineering, Tongji University, Shanghai 201804, China
| | - Xinling Xv
- School of Materials Science and Engineering, Tongji University, Shanghai 201804, China
| | - Peixuan Lin
- School of Materials Science and Engineering, Tongji University, Shanghai 201804, China
| | - Ruihao Huang
- School of Materials Science and Engineering, Tongji University, Shanghai 201804, China
| | - Deping Wang
- School of Materials Science and Engineering, Tongji University, Shanghai 201804, China
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2
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Sun L, Keshavarz M, Romolini G, Dieu B, Hofkens J, de Jong F, Fron E, Roeffaers MBJ, Van der Auweraer M. Origin of the polychromatic photoluminescence of zeolite confined Ag clusters: temperature- and co-cation-dependent luminescence. Chem Sci 2022; 13:11560-11569. [PMID: 36320393 PMCID: PMC9555561 DOI: 10.1039/d2sc03197c] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Accepted: 08/17/2022] [Indexed: 08/22/2023] Open
Abstract
Zeolite confined silver clusters (AgCLs) have attracted extensive attention due to their remarkable luminescent properties, but the elucidation of the underlying photophysical processes and especially the excited-state dynamics remains a challenge. Herein, we investigate the bright photoluminescence of AgCLs confined in Linde Type A zeolites (LTA) by systematically varying the temperature (298-77 K) and co-cation composition (Li/Na) and examining their respective influence on the steady-state and time-resolved photoluminescence. The observed polychromatic emission of the tetrahedral Ag4(H2O) n 2+ clusters ranges from orange to violet and three distinct emitting species are identified, corresponding to three long-lived triplet states populated consecutively and separated by a small energy barrier. These long-lived species are at the origin of the polychromatic luminescence with high photoluminescence quantum yields. Furthermore, the Li-content dependence of decay times points to the importance of guest-host-guest interactions in tuning the luminescent properties with a 43% decrease of the dominating decay time by increasing Li content. Based on our findings, a simplified model for the photophysical kinetics is proposed that identifies the excited-state processes. The results outlined here pave the way for a rational design of confined metal clusters in various frames and inspire the specified applications of Ag-zeolites.
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Affiliation(s)
- Li Sun
- Chem&Tech - Molecular Imaging and Photonics, KU Leuven Celestijnenlaan 200F 3001 Leuven Belgium
| | - Masoumeh Keshavarz
- Chem&Tech - Molecular Imaging and Photonics, KU Leuven Celestijnenlaan 200F 3001 Leuven Belgium
| | - Giacomo Romolini
- Chem&Tech - Molecular Imaging and Photonics, KU Leuven Celestijnenlaan 200F 3001 Leuven Belgium
| | - Bjorn Dieu
- Chem&Tech - Molecular Imaging and Photonics, KU Leuven Celestijnenlaan 200F 3001 Leuven Belgium
| | - Johan Hofkens
- Chem&Tech - Molecular Imaging and Photonics, KU Leuven Celestijnenlaan 200F 3001 Leuven Belgium
- KU Leuven Core Facility for Advanced Spectroscopy Celestijnenlaan 200F 3001 Leuven Belgium
| | - Flip de Jong
- Chem&Tech - Molecular Imaging and Photonics, KU Leuven Celestijnenlaan 200F 3001 Leuven Belgium
| | - Eduard Fron
- Chem&Tech - Molecular Imaging and Photonics, KU Leuven Celestijnenlaan 200F 3001 Leuven Belgium
- KU Leuven Core Facility for Advanced Spectroscopy Celestijnenlaan 200F 3001 Leuven Belgium
| | - Maarten B J Roeffaers
- Chem&Tech - Centre for Membrane Separations, Adsorption, Catalysis and Spectroscopy for Sustainable Solutions, KU Leuven Celestijnenlaan 200F 3001 Leuven Belgium
| | - Mark Van der Auweraer
- Chem&Tech - Molecular Imaging and Photonics, KU Leuven Celestijnenlaan 200F 3001 Leuven Belgium
- KU Leuven Core Facility for Advanced Spectroscopy Celestijnenlaan 200F 3001 Leuven Belgium
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3
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Miyanaga T, Suzuki Y, Narita S, Nakamura R. Local structure change of luminescent Ag zeolite-A and -X studied by in situ XAFS and IR spectroscopy. JOURNAL OF SYNCHROTRON RADIATION 2020; 27:1640-1647. [PMID: 33147190 DOI: 10.1107/s1600577520012540] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Accepted: 09/14/2020] [Indexed: 06/11/2023]
Abstract
The in situ X-ray absorption fine structure (XAFS) for the structural changes of Ag clusters produced in the cavity of luminescent zeolites by thermal treatment of Ag zeolite-A and Ag zeolite-X has been studied. The following procedures are compared: (i) samples are heated and cooled to room temperature under atmosphere (under air); (ii) samples are heated and cooled to room temperature in a vacuum and then exposed to air. It was confirmed that the Ag clusters were broken when the Ag zeolite was exposed to air for Ag zeolite-X, which complements our previous results for Ag12-A. It is suggested that the deformation of the Ag clusters plays an important role in the generation of a strong photoluminescence band, and Ag clusters may not be direct species producing the strong photoluminescence. The local structure of the Ag ions was found to be slightly different from that of the unheated species. The difference may originate from the formation and breakdown of Ag clusters in the zeolite cavity.
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Affiliation(s)
- Takafumi Miyanaga
- Department of Mathematics and Physics, Hirosaki University, 3 Bunkyo-cho, Hirosaki, Aomori 036-856, Japan
| | - Yushi Suzuki
- Department of Mathematics and Physics, Hirosaki University, 3 Bunkyo-cho, Hirosaki, Aomori 036-856, Japan
| | - Sho Narita
- Department of Mathematics and Physics, Hirosaki University, 3 Bunkyo-cho, Hirosaki, Aomori 036-856, Japan
| | - Reki Nakamura
- Department of Mathematics and Physics, Hirosaki University, 3 Bunkyo-cho, Hirosaki, Aomori 036-856, Japan
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4
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Yao D, Wang Y, Li P, Li H. Luminescent Ag + exchanged SOD zeolites with their potential applications in white LEDs. Dalton Trans 2020; 49:8179-8185. [PMID: 32515456 DOI: 10.1039/d0dt01425g] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Ag+ exchanged zeolites (Ag-zeolites) combining the advantages of high stability of microporous zeolites with the unique optical properties of silver clusters are attractive as promising functional materials. In this work, we systematically studied the optical properties of Ag+ exchanged SOD zeolites, obtaining tuned emission from yellow to blue and for the first time acquired white-emitting Ag-zeolite phosphors at a mild temperature (<300 °C). This tunable emission color was found to be caused by lattice shrinkage and lattice expansion of the framework in SOD zeolites. The obtained white emitting phosphors show Commission Internationale de I'Eclairage (CIE) chromaticity coordinates of (0.33, 0.34) under 395 nm excitation. In addition, we fabricated warm white LEDs with these white emitting phosphors, which show CIE coordinates of (0.37, 0.34), with a lower correlated color temperature (CCT) of 4329 K and a higher color rendering index (CRI) of 91.
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Affiliation(s)
- Decui Yao
- National-Local Joint Engineering Laboratory for Energy Conservation in Chemical Process Integration and Resources Utilization, Tianjin Key Laboratory of Chemical Process Safety, School of Chemical Engineering and Technology, Hebei University of Technology, Guangrong Dao 8, Hongqiao District, Tianjin 300130, P. R. China.
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5
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Chai Y, Shang W, Li W, Wu G, Dai W, Guan N, Li L. Noble Metal Particles Confined in Zeolites: Synthesis, Characterization, and Applications. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2019; 6:1900299. [PMID: 31453060 PMCID: PMC6702632 DOI: 10.1002/advs.201900299] [Citation(s) in RCA: 76] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Revised: 03/14/2019] [Indexed: 05/19/2023]
Abstract
Noble metal nanoparticles or subnanometric particles confined in zeolites, that is, metal@zeolite, represent an important type of functional materials with typical core-shell structure. This type of material is known for decades and recently became a research hotspot due to their emerging applications in various fields. Remarkable achievements are made dealing with the synthesis, characterization, and applications of noble metal particles confined in zeolites. Here, the most representative research progress in metal@zeolites is briefly reviewed, aiming to boost further research on this topic. For the synthesis of metal@zeolites, various strategies, such as direct synthesis from inorganic or ligand-assisted noble metal precursors, multistep postsynthesis encapsulation and ion-exchange followed by reduction, are introduced and compared. For the characterization of metal@zeolites, several most useful techniques, such as electron microscopy, X-ray based spectroscopy, infrared and fluorescence emission spectroscopy, are recommended to check the successful confinement of noble metal particles in zeolite matrix and their unique physiochemical properties. For the applications of metal@zeolites, catalysis and optics are involved with an emphasis on catalytic applications including the size-dependent catalytic properties, the sintering-resistance properties, the substrate shape-selective catalysis, and catalysis modulation by zeolite microenvironment.
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Affiliation(s)
- Yuchao Chai
- School of Materials Science and EngineeringNational Institute for Advanced MaterialsNankai UniversityTianjin300350China
| | - Weixiang Shang
- School of Materials Science and EngineeringNational Institute for Advanced MaterialsNankai UniversityTianjin300350China
| | - Weijie Li
- School of Materials Science and EngineeringNational Institute for Advanced MaterialsNankai UniversityTianjin300350China
| | - Guangjun Wu
- School of Materials Science and EngineeringNational Institute for Advanced MaterialsNankai UniversityTianjin300350China
- Key Laboratory of Advanced Energy Materials Chemistry of Ministry of EducationCollaborative Innovation Center of Chemical Science and EngineeringNankai UniversityTianjin300071China
| | - Weili Dai
- School of Materials Science and EngineeringNational Institute for Advanced MaterialsNankai UniversityTianjin300350China
- Key Laboratory of Advanced Energy Materials Chemistry of Ministry of EducationCollaborative Innovation Center of Chemical Science and EngineeringNankai UniversityTianjin300071China
| | - Naijia Guan
- School of Materials Science and EngineeringNational Institute for Advanced MaterialsNankai UniversityTianjin300350China
- Key Laboratory of Advanced Energy Materials Chemistry of Ministry of EducationCollaborative Innovation Center of Chemical Science and EngineeringNankai UniversityTianjin300071China
| | - Landong Li
- School of Materials Science and EngineeringNational Institute for Advanced MaterialsNankai UniversityTianjin300350China
- Key Laboratory of Advanced Energy Materials Chemistry of Ministry of EducationCollaborative Innovation Center of Chemical Science and EngineeringNankai UniversityTianjin300071China
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6
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Kennes K, Martin C, Baekelant W, Coutino-Gonzalez E, Fron E, Roeffaers MBJ, Hofkens J, Van der Auweraer M. Silver Zeolite Composite-Based LEDs: Origin of Electroluminescence and Charge Transport. ACS APPLIED MATERIALS & INTERFACES 2019; 11:12179-12183. [PMID: 30880384 DOI: 10.1021/acsami.8b20534] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
In this contribution, we report on the first time use of silver-exchanged zeolites embedded in the nonconductive polystyrene (PS) and their use as hybrid emitters in light-emitting diodes (ZEOLEDs). The turn on voltage and EL intensity are strongly dependent on the concentration of metal clusters. It is shown that the key to optimize this technology is improving the zeolite anode contact. Such an optimized device based on cheap abundant materials could provide an alternative for the commercial phosphor converted LEDs. A ZEOLED with a voltage polarity dependent color is demonstrated.
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Affiliation(s)
- Koen Kennes
- Chem&Tech-Molecular Imaging and Photonics , Katholieke Universiteit Leuven , Celestijnenlaan 200F , Leuven B-3001 , Belgium
| | - Cristina Martin
- Chem&Tech-Molecular Imaging and Photonics , Katholieke Universiteit Leuven , Celestijnenlaan 200F , Leuven B-3001 , Belgium
- Departamento de Química Física, Facultad de Farmacia , Universidad de Castilla-La Mancha , Campus Universitario , Albacete 02071 , Spain
| | - Wouter Baekelant
- Chem&Tech-Molecular Imaging and Photonics , Katholieke Universiteit Leuven , Celestijnenlaan 200F , Leuven B-3001 , Belgium
| | - Eduardo Coutino-Gonzalez
- CONACYT - Centro de Investigación y Desarrollo Tecnológico en Electroquímica , Querétaro C.P. 76703 , Mexico
| | - Eduard Fron
- Chem&Tech-Molecular Imaging and Photonics , Katholieke Universiteit Leuven , Celestijnenlaan 200F , Leuven B-3001 , Belgium
| | - Maarten B J Roeffaers
- Centre for Surface Chemistry and Catalysis, Faculty of Bioscience Engineering , Katholieke Universiteit Leuven , Kasteelpark Arenberg 23 , Heverlee 3001 , Belgium
| | - Johan Hofkens
- Chem&Tech-Molecular Imaging and Photonics , Katholieke Universiteit Leuven , Celestijnenlaan 200F , Leuven B-3001 , Belgium
| | - Mark Van der Auweraer
- Chem&Tech-Molecular Imaging and Photonics , Katholieke Universiteit Leuven , Celestijnenlaan 200F , Leuven B-3001 , Belgium
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7
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Calzaferri G. Entropy in multiple equilibria, compounds with different sites. Phys Chem Chem Phys 2018; 20:29070-29084. [PMID: 30452040 DOI: 10.1039/c8cp04145h] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The influence of entropy in multiple chemical equilibria is investigated for systems with different types of sites for the condition that the binding enthalpy of the species is the same within each type of sites and independent of those species that are already bonded. This allows splitting of the free reaction enthalpy into the particle distribution term and all other contributions for each type of sites separately and, hence, to evaluate this entropy contribution to the free reaction enthalpy. The situations for which this applies can be chemically very different, e.g. acid base, ligand exchange, isomerisation, conformational change, rearrangement of a ligand, ion exchange, adsorption of a species on the surface of a particle or a dendrimer, insertion of charged or neutral species into the cavities of a microporous or mesoporous host. We provide physical insight by discussing Xrc1{n1ABn2}Xrc2 systems. The number of coordination sites A and B are n1 and n2, respectively. The indices rc1 = 1, 2,…,n1 and rc2 = 1, 2,…,n2 count the number of X bonded to sites A and sites B, respectively. An important result is that the large number of equilibrium constants needed to describe those situations can be expressed as a function of two constants only. This allows studying systems quantitatively by experimental and theoretical means which otherwise might be difficult to handle. It has also implication for theoretical studies in the sense that it is sufficient to model only two reactions instead of many in order to describe a system. The results remain valid for systems with more than two types of different sites. The description of the entropy driven development of the fractional equilibrium coverage of the sites provides a new tool for understanding adsorption and ion exchange isotherms. The fractional equilibrium coverage of the sites can be described as a linear combination of individual Langmuir isotherms despite of the fact that such a linear combination has never the shape of the original Langmuir isotherm. This is remarkable and very useful. It provides us with new tools for describing and testing isotherms based on well defined, transparent physical ideas. Explicit solution for systems with 2, 3, 4, 5, 6, and 12 coordination sites are reported. Applications to a system with 12 coordination sites serve to illustrate information that can be obtained for complex situations.
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Affiliation(s)
- Gion Calzaferri
- Department of Chemistry and Biochemistry, Freiestrasse 3, 3012 Bern, Switzerland.
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8
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Aghakhani S, Grandjean D, Baekelant W, Coutiño-Gonzalez E, Fron E, Kvashnina K, Roeffaers MBJ, Hofkens J, Sels BF, Lievens P. Atomic scale reversible opto-structural switching of few atom luminescent silver clusters confined in LTA zeolites. NANOSCALE 2018; 10:11467-11476. [PMID: 29888348 DOI: 10.1039/c8nr03222j] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Luminescent silver clusters (AgCLs) stabilized inside partially Ag exchanged Na LTA zeolites show a remarkable reversible on-off switching of their green-yellowish luminescence that is easily tuned by a hydration and dehydration cycle, making them very promising materials for sensing applications. We have used a unique combination of photoluminescence (PL), UV-visible-NIR Diffuse Reflectance (DRS), X-ray absorption fine structure (XAFS), Fourier Transform-Infrared (FTIR) and electron spin resonance (ESR) spectroscopies to unravel the atomic-scale structural changes responsible for the reversible optical behavior of the confined AgCLs in LTA zeolites. Water coordinated, diamagnetic, tetrahedral AgCLs [Ag4(H2O)4]2+ with Ag atoms positioned along the axis of the sodalite six-membered rings are at the origin of the broad and intense green-yellowish luminescence in the hydrated sample. Upon dehydration, luminescent [Ag4(H2O)4]2+ clusters are transformed into non-luminescent (dark), diamagnetic, octahedral AgCLs [Ag6(OF)14]2+ with Ag atoms interacting strongly with zeolite framework oxygen (OF) of the sodalite four-membered rings. This highly responsive on-off switching reveals that besides quantum confinement and molecular-size, coordinated water and framework oxygen ligands strongly affect the organization of AgCLs valence electrons and play a crucial role in the opto-structural properties of AgCLs.
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Affiliation(s)
- Saleh Aghakhani
- Department of Physics and Astronomy, Laboratory of Solid State Physics and Magnetism, KU Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium.
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9
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Calzaferri G. Entropy in multiple equilibria, theory and applications. Phys Chem Chem Phys 2017; 19:10611-10621. [DOI: 10.1039/c7cp00584a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Entropy controls the dependence of the equilibrium constants in the synthesis of host–guest composites on the occupation rc for channels of different length.
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Affiliation(s)
- Gion Calzaferri
- Department of Chemistry and Biochemistry
- 3012 Bern
- Switzerland
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10
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Tong Y, Zhang Y, Tong N, Zhang Z, Wang Y, Zhang X, Zhu S, Li F, Wang X. HZSM-5 zeolites containing impurity iron species for the photocatalytic reduction of CO2 with H2O. Catal Sci Technol 2016. [DOI: 10.1039/c6cy01237j] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The impurity [Fe3+–O2−] species in HZSM-5 zeolite is predominantly tetrahedrally coordinated and is the photoactive centre for photocatalytic CO2 conversion.
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Affiliation(s)
- Yuecong Tong
- State Key Laboratory of Photocatalysis on Energy and Environment
- School of Chemistry
- Fuzhou University
- Fuzhou 350116
- PR China
| | - Yingguang Zhang
- State Key Laboratory of Photocatalysis on Energy and Environment
- School of Chemistry
- Fuzhou University
- Fuzhou 350116
- PR China
| | - Na Tong
- State Key Laboratory of Photocatalysis on Energy and Environment
- School of Chemistry
- Fuzhou University
- Fuzhou 350116
- PR China
| | - Zizhong Zhang
- State Key Laboratory of Photocatalysis on Energy and Environment
- School of Chemistry
- Fuzhou University
- Fuzhou 350116
- PR China
| | - Ying Wang
- State Key Laboratory of Photocatalysis on Energy and Environment
- School of Chemistry
- Fuzhou University
- Fuzhou 350116
- PR China
| | - Xiaoyan Zhang
- State Key Laboratory of Photocatalysis on Energy and Environment
- School of Chemistry
- Fuzhou University
- Fuzhou 350116
- PR China
| | - Shuying Zhu
- State Key Laboratory of Photocatalysis on Energy and Environment
- School of Chemistry
- Fuzhou University
- Fuzhou 350116
- PR China
| | - Fuying Li
- State Key Laboratory of Photocatalysis on Energy and Environment
- School of Chemistry
- Fuzhou University
- Fuzhou 350116
- PR China
| | - Xuxu Wang
- State Key Laboratory of Photocatalysis on Energy and Environment
- School of Chemistry
- Fuzhou University
- Fuzhou 350116
- PR China
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11
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Lin H, Imakita K, Fujii M, Prokof'ev VY, Gordina NE, Saïd B, Galarneau A. Visible emission from Ag(+) exchanged SOD zeolites. NANOSCALE 2015; 7:15665-15671. [PMID: 26349525 DOI: 10.1039/c5nr04246a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Broad visible emissions dominant at green or red have been observed for the thermally-treated Ag(+) exchanged SOD zeolites, determined by the Ag(+) loading contents and the excitation wavelengths. Contrary to the notable reversible green/red dominant emission evolution in the Ag(+) exchanged LTA zeolites upon hydration/dehydration in air (or water vapor)/vacuum, emission spectra of the Ag(+) exchanged SOD zeolites are insensitive to the environmental change. This is most probably due to the difficult H2O permeation in SOD zeolites in comparison with LTA zeolites. By combining the environment dependent emission spectra of the Ag(+) exchanged LTA and SOD zeolites, we proposed the following emission mechanisms for Ag(+) exchanged LTA and SOD zeolites: the green emission is due to the transition from ligand-to-metal (framework O(2-)→ Ag(+)) charge transfer state to the ground state and the red emission is due to the transition from the metal-metal (Ag(+)-Ag(+)) charge transfer state to the ground state. The insensitive environment dependent emission characteristics of Ag(+) exchanged SOD zeolites may have potential applications as robust phosphors.
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Affiliation(s)
- H Lin
- Department of Electrical and Electronic Engineering, Graduate School of Engineering, Kobe University, Rokkodai, Nada, Kobe 657-8501, Japan.
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12
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Bordiga S, Lamberti C, Bonino F, Travert A, Thibault-Starzyk F. Probing zeolites by vibrational spectroscopies. Chem Soc Rev 2015; 44:7262-341. [PMID: 26435467 DOI: 10.1039/c5cs00396b] [Citation(s) in RCA: 188] [Impact Index Per Article: 20.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
This review addresses the most relevant aspects of vibrational spectroscopies (IR, Raman and INS) applied to zeolites and zeotype materials. Surface Brønsted and Lewis acidity and surface basicity are treated in detail. The role of probe molecules and the relevance of tuning both the proton affinity and the steric hindrance of the probe to fully understand and map the complex site population present inside microporous materials are critically discussed. A detailed description of the methods needed to precisely determine the IR absorption coefficients is given, making IR a quantitative technique. The thermodynamic parameters of the adsorption process that can be extracted from a variable-temperature IR study are described. Finally, cutting-edge space- and time-resolved experiments are reviewed. All aspects are discussed by reporting relevant examples. When available, the theoretical literature related to the reviewed experimental results is reported to support the interpretation of the vibrational spectra on an atomic level.
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Affiliation(s)
- Silvia Bordiga
- Department of Chemistry, NIS and INSTM Reference Centers, University of Torino, Via Quarello 15, I-10135 Torino, Italy
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13
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Proton Adsorption Selectivity of Zeolites in Aqueous Media: Effect of Exchangeable Cation Species of Zeolites. ENVIRONMENTS 2015. [DOI: 10.3390/environments2010091] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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14
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Liu Y, Khalili Najafabadi B, Azizpoor Fard M, Corrigan JF. A Functionalized Ag2S Molecular Architecture: Facile Assembly of the Atomically Precise Ferrocene-Decorated Nanocluster [Ag74S19(dppp)6(fc(C{O}OCH2CH2S)2)18]. Angew Chem Int Ed Engl 2015; 54:4832-5. [DOI: 10.1002/anie.201411944] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2014] [Revised: 02/01/2015] [Indexed: 11/06/2022]
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15
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Liu Y, Khalili Najafabadi B, Azizpoor Fard M, Corrigan JF. A Functionalized Ag2S Molecular Architecture: Facile Assembly of the Atomically Precise Ferrocene-Decorated Nanocluster [Ag74S19(dppp)6(fc(C{O}OCH2CH2S)2)18]. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201411944] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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16
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Belkhair S, Kinninmonth M, Fisher L, Gasharova B, Liauw CM, Verran J, Mihailova B, Tosheva L. Silver zeolite-loaded silicone elastomers: a multidisciplinary approach to synthesis and antimicrobial assessment. RSC Adv 2015. [DOI: 10.1039/c5ra03856a] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The fabrication of silicone elastomers containing organo-silane modified Ag-zeolites with potential for applications as antibacterial medical devices is demonstrated.
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Affiliation(s)
- Sama Belkhair
- Faculty of Science and Engineering
- Manchester Metropolitan University
- Manchester
- UK
| | - Malcolm Kinninmonth
- Faculty of Science and Engineering
- Manchester Metropolitan University
- Manchester
- UK
| | - Leanne Fisher
- Faculty of Science and Engineering
- Manchester Metropolitan University
- Manchester
- UK
| | - Biliana Gasharova
- Institute for Photon Science and Synchrotron Radiation
- Karlsruhe Institute of Technology
- Karlsruhe 76021
- Germany
| | - Christopher M. Liauw
- Faculty of Science and Engineering
- Manchester Metropolitan University
- Manchester
- UK
| | - Joanna Verran
- Faculty of Science and Engineering
- Manchester Metropolitan University
- Manchester
- UK
| | - Boriana Mihailova
- Mineralogisch-Petrographisches Institut
- Universität Hamburg
- D-20146 Hamburg
- Germany
| | - Lubomira Tosheva
- Faculty of Science and Engineering
- Manchester Metropolitan University
- Manchester
- UK
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Bordiga S, Groppo E, Agostini G, van Bokhoven JA, Lamberti C. Reactivity of Surface Species in Heterogeneous Catalysts Probed by In Situ X-ray Absorption Techniques. Chem Rev 2013; 113:1736-850. [DOI: 10.1021/cr2000898] [Citation(s) in RCA: 488] [Impact Index Per Article: 44.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Silvia Bordiga
- Department of Chemistry and NIS Centre of Excellence, Università di Torino and INSTM Reference Center, Via P. Giuria 7, 10125 Torino, Italy
| | - Elena Groppo
- Department of Chemistry and NIS Centre of Excellence, Università di Torino and INSTM Reference Center, Via P. Giuria 7, 10125 Torino, Italy
| | - Giovanni Agostini
- Department of Chemistry and NIS Centre of Excellence, Università di Torino and INSTM Reference Center, Via P. Giuria 7, 10125 Torino, Italy
| | - Jeroen A. van Bokhoven
- ETH Zurich, Institute for Chemical and Bioengineering, HCI E127 8093 Zurich, Switzerland
- Laboratory for Catalysis and Sustainable Chemistry (LSK) Swiss Light Source, Paul Scherrer Instituteaul Scherrer Institute, Villigen, Switzerland
| | - Carlo Lamberti
- Department of Chemistry and NIS Centre of Excellence, Università di Torino and INSTM Reference Center, Via P. Giuria 7, 10125 Torino, Italy
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Saint-Cricq P, Kamimura Y, Itabashi K, Sugawara-Narutaki A, Shimojima A, Okubo T. Antibacterial Activity of Silver-Loaded “Green Zeolites”. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201200476] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Choi S, Dickson RM, Yu J. Developing luminescent silver nanodots for biological applications. Chem Soc Rev 2012; 41:1867-91. [DOI: 10.1039/c1cs15226b] [Citation(s) in RCA: 493] [Impact Index Per Article: 41.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Yumura T, Nanba T, Torigoe H, Kuroda Y, Kobayashi H. Behavior of Ag3 clusters inside a nanometer-sized space of ZSM-5 zeolite. Inorg Chem 2011; 50:6533-42. [PMID: 21692451 DOI: 10.1021/ic2001514] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We found from DFT calculations that Ag-Ag orbital interactions as well as Ag-O electrostatic interactions determine the structures of three silver cations inside a nanometer-sized cavity of ZSM-5 (Ag(3)-ZSM-5) in lower and higher spin states. Both interactions strongly depend on the number of Al atoms substituted for Si atoms on the ZSM-5 framework (ZSM-5(Al(n))), where n ranges from 1 to 3. In smaller n, stronger Ag-Ag orbital interactions and weaker Ag-O electrostatic interactions operate. Accordingly, there are significant dependencies of the structures of three silver cations on the number of Al atoms. In lower spin states of Ag(3)-ZSM-5(Al(1)) and Ag(3)-ZSM-5(Al(2)), D(3h)-like triangle clusters are contained inside ZSM-5 whereas their higher spin states have triangle clusters distorted significantly from the D(3h) structure. In lower spin states, the totally symmetric orbital consisting of 5s(Ag) orbitals is responsible for cluster formation, whereas in higher spin states occupation of a 5s(Ag)-based orbital with one node results in significant distortion of the triangle clusters. The distortion can be partially understood by analogies to Jahn-Teller distortion of the bare D(3h) Ag(3)(+) cluster in the triplet spin state. When n is 3, we found that three silver cations are isolated in a lower spin state and that a linear cluster consisting of two silver cations is formed in a higher spin state. Thus, we demonstrate from DFT calculations that the number of Al atoms can control the properties of three silver cations inside a ZSM-5 cavity. Since the structural and electronic features of the enclosed silver clusters can link to their catalytic properties, the DFT findings can help us to understand the catalytic activity of Ag-ZSM-5.
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Affiliation(s)
- Takashi Yumura
- Department of Chemistry and Materials Technology, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto, 606-8585, Japan.
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21
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Gomez RS, Li X, Yson RL, Patterson HH. Zeolite-supported silver and silver–iron nanoclusters and their activities as photodecomposition catalysts. RESEARCH ON CHEMICAL INTERMEDIATES 2011. [DOI: 10.1007/s11164-011-0313-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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22
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Zhang H, Li H. Efficient visible and near-infrared photoluminescence from lanthanide and bismuth functionalized zeolite L. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm11765c] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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23
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Lamberti C, Zecchina A, Groppo E, Bordiga S. Probing the surfaces of heterogeneous catalysts by in situ IR spectroscopy. Chem Soc Rev 2010; 39:4951-5001. [PMID: 21038053 DOI: 10.1039/c0cs00117a] [Citation(s) in RCA: 358] [Impact Index Per Article: 25.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
This critical review describes the reactivity of heterogeneous catalysts from the point of view of four simple, but essential for Chemistry, molecules (namely dihydrogen, carbon monoxide, nitrogen monoxide and ethylene) that are considered as probes or as reactants in combination with "in situ" controlled temperature and pressure Infrared spectroscopy. The fundamental properties of H(2), CO, NO and C(2)H(4) are shortly described in order to justify their different behaviour in respect of isolated sites in different environments, extended surfaces, clusters, crystalline or amorphous materials. The description is given by considering some "key studies" and trying to evidence similarities and differences among surfaces and probes (572 references).
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Affiliation(s)
- Carlo Lamberti
- Department of Inorganic, Physical and Materials Chemistry, NIS Centre of Excellence, University of Turin. Via P. Giuria 7, 10125 Torino, Italy
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De Cremer G, Coutiño-Gonzalez E, Roeffaers MBJ, De Vos DE, Hofkens J, Vosch T, Sels BF. In Situ Observation of the Emission Characteristics of Zeolite-Hosted Silver Species During Heat Treatment. Chemphyschem 2010; 11:1627-31. [DOI: 10.1002/cphc.201000065] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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25
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De Cremer G, Coutiño-Gonzalez E, Roeffaers MBJ, Moens B, Ollevier J, Van der Auweraer M, Schoonheydt R, Jacobs PA, De Schryver FC, Hofkens J, De Vos DE, Sels BF, Vosch T. Characterization of Fluorescence in Heat-Treated Silver-Exchanged Zeolites. J Am Chem Soc 2009; 131:3049-56. [DOI: 10.1021/ja810071s] [Citation(s) in RCA: 147] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Gert De Cremer
- Department of Microbial and Molecular Systems, Centre for Surface Chemistry and Catalysis, Katholieke Universiteit Leuven, Kasteelpark Arenberg 23, B-3001 Leuven, Belgium, and Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, B-3001, Leuven, Belgium
| | - Eduardo Coutiño-Gonzalez
- Department of Microbial and Molecular Systems, Centre for Surface Chemistry and Catalysis, Katholieke Universiteit Leuven, Kasteelpark Arenberg 23, B-3001 Leuven, Belgium, and Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, B-3001, Leuven, Belgium
| | - Maarten B. J. Roeffaers
- Department of Microbial and Molecular Systems, Centre for Surface Chemistry and Catalysis, Katholieke Universiteit Leuven, Kasteelpark Arenberg 23, B-3001 Leuven, Belgium, and Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, B-3001, Leuven, Belgium
| | - Bart Moens
- Department of Microbial and Molecular Systems, Centre for Surface Chemistry and Catalysis, Katholieke Universiteit Leuven, Kasteelpark Arenberg 23, B-3001 Leuven, Belgium, and Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, B-3001, Leuven, Belgium
| | - Jeroen Ollevier
- Department of Microbial and Molecular Systems, Centre for Surface Chemistry and Catalysis, Katholieke Universiteit Leuven, Kasteelpark Arenberg 23, B-3001 Leuven, Belgium, and Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, B-3001, Leuven, Belgium
| | - Mark Van der Auweraer
- Department of Microbial and Molecular Systems, Centre for Surface Chemistry and Catalysis, Katholieke Universiteit Leuven, Kasteelpark Arenberg 23, B-3001 Leuven, Belgium, and Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, B-3001, Leuven, Belgium
| | - Robert Schoonheydt
- Department of Microbial and Molecular Systems, Centre for Surface Chemistry and Catalysis, Katholieke Universiteit Leuven, Kasteelpark Arenberg 23, B-3001 Leuven, Belgium, and Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, B-3001, Leuven, Belgium
| | - Pierre A. Jacobs
- Department of Microbial and Molecular Systems, Centre for Surface Chemistry and Catalysis, Katholieke Universiteit Leuven, Kasteelpark Arenberg 23, B-3001 Leuven, Belgium, and Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, B-3001, Leuven, Belgium
| | - Frans C. De Schryver
- Department of Microbial and Molecular Systems, Centre for Surface Chemistry and Catalysis, Katholieke Universiteit Leuven, Kasteelpark Arenberg 23, B-3001 Leuven, Belgium, and Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, B-3001, Leuven, Belgium
| | - Johan Hofkens
- Department of Microbial and Molecular Systems, Centre for Surface Chemistry and Catalysis, Katholieke Universiteit Leuven, Kasteelpark Arenberg 23, B-3001 Leuven, Belgium, and Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, B-3001, Leuven, Belgium
| | - Dirk E. De Vos
- Department of Microbial and Molecular Systems, Centre for Surface Chemistry and Catalysis, Katholieke Universiteit Leuven, Kasteelpark Arenberg 23, B-3001 Leuven, Belgium, and Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, B-3001, Leuven, Belgium
| | - Bert F. Sels
- Department of Microbial and Molecular Systems, Centre for Surface Chemistry and Catalysis, Katholieke Universiteit Leuven, Kasteelpark Arenberg 23, B-3001 Leuven, Belgium, and Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, B-3001, Leuven, Belgium
| | - Tom Vosch
- Department of Microbial and Molecular Systems, Centre for Surface Chemistry and Catalysis, Katholieke Universiteit Leuven, Kasteelpark Arenberg 23, B-3001 Leuven, Belgium, and Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, B-3001, Leuven, Belgium
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Brühwiler D, Calzaferri G, Torres T, Ramm JH, Gartmann N, Dieu LQ, López-Duarte I, Martínez-Díaz MV. Nanochannels for supramolecular organization of luminescent guests. ACTA ACUST UNITED AC 2009. [DOI: 10.1039/b907308f] [Citation(s) in RCA: 139] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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28
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De Cremer G, Antoku Y, Roeffaers M, Sliwa M, Van Noyen J, Smout S, Hofkens J, De Vos D, Sels B, Vosch T. Photoactivation of Silver-Exchanged Zeolite A. Angew Chem Int Ed Engl 2008; 47:2813-6. [DOI: 10.1002/anie.200704861] [Citation(s) in RCA: 87] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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29
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De Cremer G, Antoku Y, Roeffaers M, Sliwa M, Van Noyen J, Smout S, Hofkens J, De Vos D, Sels B, Vosch T. Photoactivation of Silver-Exchanged Zeolite A. Angew Chem Int Ed Engl 2008. [DOI: 10.1002/ange.200704861] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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31
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32
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Reddy VR, Currao A, Calzaferri G. Zeolite A and zeolite L monolayers modified with AgCl as photocatalyst for water oxidation to O2. ACTA ACUST UNITED AC 2007. [DOI: 10.1039/b705219g] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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33
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New frontier in transmission IR spectroscopy of molecules adsorbed on high surface area solids: Experiments below liquid nitrogen temperature. Catal Today 2006. [DOI: 10.1016/j.cattod.2005.11.011] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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34
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Calzaferri G, Bossart O, Brühwiler D, Huber S, Leiggener C, Van Veen MK, Ruiz AZ. Light-harvesting host–guest antenna materials for quantum solar energy conversion devices. CR CHIM 2006. [DOI: 10.1016/j.crci.2005.03.026] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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35
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Leiggener C, Calzaferri G. Synthesis and Luminescence Properties of Ag2S and PbS Clusters in Zeolite A. Chemistry 2005; 11:7191-8. [PMID: 16193523 DOI: 10.1002/chem.200500495] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Zeolite A provides a suitable environment to host Ag2S and PbS clusters, so that spectroscopic investigations on very small particles are possible. The Ag2S monomer is colorless and shows photoluminescence at 490 nm with a lifetime of 300 micros, while the absorption and luminescence of Ag4S2 and larger clusters are red-shifted. The properties of these Ag2S/zeolite A materials depend on the co-cations. Results for Li+, Na+, K+, Rb+, Cs+, Mg2+, Ca2+, and Sr2+ are reported. Excitation energy transfer between Ag2S and Ag4S2 has been studied in materials containing Ca2+ co-cations. PbS particles can be prepared by the same method as Ag2S in the cavities of zeolite A. The PbS monomers obtained are yellow and show photoluminescence at 570 nm, with a lifetime of 700 ns.
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Affiliation(s)
- Claudia Leiggener
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, 3012 Bern, Switzerland
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36
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Meyer M, Currao A, Calzaferri G. Particle Distribution in a Microporous Material: Theoretical Concept. Chemphyschem 2005; 6:2167-78. [PMID: 16208741 DOI: 10.1002/cphc.200500126] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Particle distribution and exchange equilibria in a microporous host material, built up of equivalent particle sites, which are grouped in larger subsets, are described. Simplified descriptions evolve from the exact formulae in the thermodynamic limit. We find that, for example, a single zeolite A nanocrystal consisting of about 1000 pseudo-unit-cells fixes a lower limit for the use of the approximate formula describing particle distribution. A rational selectivity coefficient, which is approximately constant over the whole exchange range, only results if a single zeolite crystal consists of one million pseudo-unit-cells or more, or if a sufficiently large number of smaller crystals is considered. On the basis of the statistical particle distribution model, a closed, simple formula for the ion-exchange isotherm is then derived, which is valid for systems involving a variable number of coupled-exchange reactions. Its similarity to the Langmuir isotherm is discussed. The theory on ion-exchange equilibria is used to derive formulae for the change of free-energy, enthalpy, and entropy occurring in coupled ion-exchange reactions. The findings, though applicable to virtually any particle exchanging system with the structural properties described above, are applied to zeolite A, since this material can be treated as a nearly ideal model. The results derived can straightforwardly be used to evaluate experimental data quantitatively, since the common inequivalence of the host sites can be taken into account.
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Affiliation(s)
- Marc Meyer
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, 3012 Bern, Switzerland
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37
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Meyer M, Leiggener C, Calzaferri G. Particle Distribution in a Microporous Material: Experiments with Zeolite A. Chemphyschem 2005; 6:1071-80. [PMID: 15883991 DOI: 10.1002/cphc.200500049] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
The theory on particle distribution and exchange equilibria in a microporous material is applied to experimental ion-exchange data involving zeolite Na-A and zeolite K-A, with silver ions as the exchanging species. The presented method enables direct evaluation of the measured data and consideration of nonequivalent particle sites. The isotherms of the K+ versus Ag+ exchange in zeolite K-A rise much more steeply, at low exchange degrees, than those of the Na+ versus Ag+ exchange in zeolite Na-A. This result implies a different course of the ion-exchange reactions. Spectroscopic measurements on dehydrated, partly silver-exchanged zeolites Na-A and K-A do indeed show that in zeolite Na-A, the Na+ ions occupying four-ring positions are exchanged faster for Ag+ than the Na+ ions occupying eight- and six-ring positions, while in zeolite K-A the exchange does not start with the four-ring ion but with six-ring ions, followed by the four-ring ion. These findings are consistent with the results obtained from evaluation of the ion-exchange data. The resulting thermodynamic quantities significantly differ from published reference values, which we suggest should be revised.
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Affiliation(s)
- Marc Meyer
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, 3012 Bern, Switzerland
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38
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Thomas JK. Physical Aspects of Radiation-Induced Processes on SiO2, γ-Al2O3, Zeolites, and Clays. Chem Rev 2005; 105:1683-734. [PMID: 15884787 DOI: 10.1021/cr020378a] [Citation(s) in RCA: 87] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- J K Thomas
- Department of Chemistry and Biochemistry, 251 Nieuwland Science Hall, University of Notre Dame, Notre Dame, Indiana 46556, USA.
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39
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Bolis V, Barbaglia A, Bordiga S, Lamberti C, Zecchina A. Heterogeneous Nonclassical Carbonyls Stabilized in Cu(I)− and Ag(I)−ZSM-5 Zeolites: Thermodynamic and Spectroscopic Features. J Phys Chem B 2004. [DOI: 10.1021/jp049613e] [Citation(s) in RCA: 86] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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40
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Pavlovskaya GE, Horton-Garcia CF, Dybowski C, Corbin DR, Meersmann T. Metallic Clusters and Color Changes in Silver-Exchanged Zeolites: 109Ag Solid State NMR and Optical Studies. J Phys Chem B 2004. [DOI: 10.1021/jp036584j] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Galina E. Pavlovskaya
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716-2522, and Center Research and Development, DuPont Company, Wilmington, Delaware 19880-0262
| | - Charlene F. Horton-Garcia
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716-2522, and Center Research and Development, DuPont Company, Wilmington, Delaware 19880-0262
| | - Cecil Dybowski
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716-2522, and Center Research and Development, DuPont Company, Wilmington, Delaware 19880-0262
| | - David R. Corbin
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716-2522, and Center Research and Development, DuPont Company, Wilmington, Delaware 19880-0262
| | - Thomas Meersmann
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716-2522, and Center Research and Development, DuPont Company, Wilmington, Delaware 19880-0262
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Leiggener C, Brühwiler D, Calzaferri G. Luminescence properties of Ag2S and Ag4S2in zeolite A. ACTA ACUST UNITED AC 2003. [DOI: 10.1039/b303937b] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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