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Chen X, Yu T. Simulating Crystal Structure, Acidity, Proton Distribution, and IR Spectra of Acid Zeolite HSAPO-34: A High Accuracy Study. Molecules 2023; 28:8087. [PMID: 38138579 PMCID: PMC10745790 DOI: 10.3390/molecules28248087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Revised: 12/04/2023] [Accepted: 12/05/2023] [Indexed: 12/24/2023] Open
Abstract
It is a challenge to characterize the acid properties of microporous materials in either experiments or theory. This study presents the crystal structure, acid site, acid strength, proton siting, and IR spectra of HSAPO-34 from the SCAN + rVV10 method. The results indicate: the crystal structures of various acid sites of HSAPO-34 deviate from the space group of R3¯; the acid strength inferred from the DPE value likely decreases with the proton binding sites at O(2), O(4), O(1),and O(3), contrary to the stability order in view of the internal energy; the calculated ensemble-averaged DPE is about 1525 kJ/mol at 673.15 K; and the proton siting and the proton distribution are distinctly influenced by the temperature: at low temperatures, the proton is predominantly located at O(3), while it prefers O(2) at high temperatures, and the proton at O(4) assumedly has the least distribution at 273.15-773.15 K. In line with the neutron diffraction experiment, a correction factor of 0.979 is needed to correct for the calculated hydroxyl stretching vibration (ν(O-H)) of HSAPO-34. It seems that the SCAN meta-GGA method, compensating for some drawbacks of the GGA method, could provide satisfying results regarding the acid properties of HSAPO-34.
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Affiliation(s)
- Xiaofang Chen
- Institute of Molecular Sciences and Engineering, Institute of Frontier and Interdisciplinary Science, Shandong University, Qingdao 266237, China;
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2
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Artsiusheuski MA, Verel R, van Bokhoven JA, Sushkevich VL. Methane Transformation over Copper-Exchanged Zeolites: From Partial Oxidation to C–C Coupling and Formation of Hydrocarbons. ACS Catal 2021. [DOI: 10.1021/acscatal.1c02547] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Mikalai A. Artsiusheuski
- Laboratory for Catalysis and Sustainable Chemistry, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland
- Institute for Chemistry and Bioengineering, ETH Zurich, Vladimir-Prelog-Weg 1, 8093 Zurich, Switzerland
| | - René Verel
- Institute for Chemistry and Bioengineering, ETH Zurich, Vladimir-Prelog-Weg 1, 8093 Zurich, Switzerland
| | - Jeroen A. van Bokhoven
- Laboratory for Catalysis and Sustainable Chemistry, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland
- Institute for Chemistry and Bioengineering, ETH Zurich, Vladimir-Prelog-Weg 1, 8093 Zurich, Switzerland
| | - Vitaly L. Sushkevich
- Institute for Chemistry and Bioengineering, ETH Zurich, Vladimir-Prelog-Weg 1, 8093 Zurich, Switzerland
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3
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More efficient ethanol synthesis from dimethyl ether and syngas over the combined nano-sized ZSM-35 zeolite with CuZnAl catalyst. Catal Today 2021. [DOI: 10.1016/j.cattod.2020.03.035] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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4
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Najmi S, So J, Stavitski E, McDermott WP, Lyu Y, Burt SP, Hermans I, Sholl DS, Sievers C. In‐situ
IR Spectroscopy Study of Reactions of C3 Oxygenates on Heteroatom (Sn, Mo, and W) doped BEA Zeolites and the Effect of Co‐adsorbed Water. ChemCatChem 2021. [DOI: 10.1002/cctc.202001424] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Sean Najmi
- School of Chemical & Biomolecular Engineering Georgia Institute of Technology Atlanta GA 30332 USA
| | - Jungseob So
- School of Chemical & Biomolecular Engineering Georgia Institute of Technology Atlanta GA 30332 USA
| | - Eli Stavitski
- National Synchrotron Light Source II Brookhaven National Laboratory Upton NY 11973 USA
| | - William P. McDermott
- Department of Chemistry & Department of Chemical and Biological Engineering University of Wisconsin-Madison Madison WI 53706 USA
| | - Yimeng Lyu
- School of Chemical & Biomolecular Engineering Georgia Institute of Technology Atlanta GA 30332 USA
| | - Sam P. Burt
- Department of Chemistry & Department of Chemical and Biological Engineering University of Wisconsin-Madison Madison WI 53706 USA
| | - Ive Hermans
- Department of Chemistry & Department of Chemical and Biological Engineering University of Wisconsin-Madison Madison WI 53706 USA
| | - David S. Sholl
- School of Chemical & Biomolecular Engineering Georgia Institute of Technology Atlanta GA 30332 USA
| | - Carsten Sievers
- School of Chemical & Biomolecular Engineering Georgia Institute of Technology Atlanta GA 30332 USA
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5
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Liu S, Liu H, Ma X, Liu Y, Zhu W, Liu Z. Identifying and controlling the acid site distributions in mordenite zeolite for dimethyl ether carbonylation reaction by means of selective ion-exchange. Catal Sci Technol 2020. [DOI: 10.1039/d0cy00125b] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The identification and regulation of acid site distributions in mordenite zeolites are accomplished by using tetramethylammonium ions to selectively exchange with the counter ions in 12-membered channels.
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Affiliation(s)
- Shiping Liu
- National Engineering Laboratory for Methanol to Olefins
- Dalian National Laboratory for Clean Energy
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian
| | - Hongchao Liu
- National Engineering Laboratory for Methanol to Olefins
- Dalian National Laboratory for Clean Energy
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian
| | - Xiangang Ma
- National Engineering Laboratory for Methanol to Olefins
- Dalian National Laboratory for Clean Energy
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian
| | - Yong Liu
- National Engineering Laboratory for Methanol to Olefins
- Dalian National Laboratory for Clean Energy
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian
| | - Wenliang Zhu
- National Engineering Laboratory for Methanol to Olefins
- Dalian National Laboratory for Clean Energy
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian
| | - Zhongmin Liu
- National Engineering Laboratory for Methanol to Olefins
- Dalian National Laboratory for Clean Energy
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian
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6
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Study of Ethanol/Acetaldehyde to 1,3-Butadiene Over MgO–SiO2 Catalyst: Comparative Investigation of Deactivation Behaviour Due to Carbon Deposition. Catal Letters 2019. [DOI: 10.1007/s10562-019-03049-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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7
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Chen W, Yi X, Huang L, Liu W, Li G, Acharya D, Sun X, Zheng A. Can Hammett indicators accurately measure the acidity of zeolite catalysts with confined space? Insights into the mechanism of coloration. Catal Sci Technol 2019. [DOI: 10.1039/c9cy01392j] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The acidic properties of zeolite catalysts play a crucial role in governing catalytic performances, which makes the acidity characterization an important subject in the field of zeolite catalysis.
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Affiliation(s)
- Wei Chen
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics
- National Center for Magnetic Resonance in Wuhan
- Key Laboratory of Magnetic Resonance in Biological Systems
- Wuhan Institute of Physics and Mathematics
- Chinese Academy of Sciences
| | - Xianfeng Yi
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics
- National Center for Magnetic Resonance in Wuhan
- Key Laboratory of Magnetic Resonance in Biological Systems
- Wuhan Institute of Physics and Mathematics
- Chinese Academy of Sciences
| | - Ling Huang
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics
- National Center for Magnetic Resonance in Wuhan
- Key Laboratory of Magnetic Resonance in Biological Systems
- Wuhan Institute of Physics and Mathematics
- Chinese Academy of Sciences
| | - Wentao Liu
- School of Materials Science and Engineering
- Zhengzhou University
- Zhengzhou
- P. R. China
| | - Guangchao Li
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics
- National Center for Magnetic Resonance in Wuhan
- Key Laboratory of Magnetic Resonance in Biological Systems
- Wuhan Institute of Physics and Mathematics
- Chinese Academy of Sciences
| | - Dinesh Acharya
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics
- National Center for Magnetic Resonance in Wuhan
- Key Laboratory of Magnetic Resonance in Biological Systems
- Wuhan Institute of Physics and Mathematics
- Chinese Academy of Sciences
| | - Xianyong Sun
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics
- National Center for Magnetic Resonance in Wuhan
- Key Laboratory of Magnetic Resonance in Biological Systems
- Wuhan Institute of Physics and Mathematics
- Chinese Academy of Sciences
| | - Anmin Zheng
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics
- National Center for Magnetic Resonance in Wuhan
- Key Laboratory of Magnetic Resonance in Biological Systems
- Wuhan Institute of Physics and Mathematics
- Chinese Academy of Sciences
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8
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Chu Y, Gao X, Zhang X, Xu G, Li G, Zheng A. Identifying the effective phosphorous species over modified P-ZSM-5 zeolite: a theoretical study. Phys Chem Chem Phys 2018; 20:11702-11712. [DOI: 10.1039/c8cp00946e] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this work, a density functional theory (DFT) study was carried out to address the fundamental description of the effective phosphorous species that could improve the framework stability and reduce the coke deposition formation on the P-ZSM-5 zeolite.
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Affiliation(s)
- Yueying Chu
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics
- National Center for Magnetic Resonance in Wuhan
- Wuhan Institute of Physics and Mathematics
- Chinese Academy of Sciences
- Wuhan 430071
| | - Xiuzhi Gao
- State Key Laboratory of Catalytic Materials and Reaction Engineering (RIPP, SINOPEC)
- Beijing
- China
| | - Xin Zhang
- State Key Laboratory of Catalytic Materials and Reaction Engineering (RIPP, SINOPEC)
- Beijing
- China
| | - Guangtong Xu
- State Key Laboratory of Catalytic Materials and Reaction Engineering (RIPP, SINOPEC)
- Beijing
- China
| | - Guangchao Li
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics
- National Center for Magnetic Resonance in Wuhan
- Wuhan Institute of Physics and Mathematics
- Chinese Academy of Sciences
- Wuhan 430071
| | - Anmin Zheng
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics
- National Center for Magnetic Resonance in Wuhan
- Wuhan Institute of Physics and Mathematics
- Chinese Academy of Sciences
- Wuhan 430071
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9
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Liu C, Tranca I, van Santen RA, Hensen EJM, Pidko EA. Scaling Relations for Acidity and Reactivity of Zeolites. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2017; 121:23520-23530. [PMID: 29142616 PMCID: PMC5677757 DOI: 10.1021/acs.jpcc.7b08176] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Revised: 10/02/2017] [Indexed: 05/22/2023]
Abstract
Zeolites are widely applied as solid acid catalysts in various technological processes. In this work we have computationally investigated how catalytic reactivity scales with acidity for a range of zeolites with different topologies and chemical compositions. We found that straightforward correlations are limited to zeolites with the same topology. The adsorption energies of bases such as carbon monoxide (CO), acetonitrile (CH3CN), ammonia (NH3), trimethylamine (N(CH3)3), and pyridine (C5H5N) give the same trend of acid strength for FAU zeolites with varying composition. Crystal orbital Hamilton populations (COHP) analysis provides a detailed molecular orbital picture of adsorbed base molecules on the Brønsted acid sites (BAS). Bonding is dominated by strong σ donation from guest molecules to the BAS for the adsorbed CO and CH3CN complexes. An electronic descriptor of acid strength is constructed based on the bond order calculations, which is an intrinsic parameter rather than adsorption energy that contains additional contributions due to secondary effects such as van der Waals interactions with the zeolite walls. The bond order parameter derived for the CH3CN adsorption complex represents a useful descriptor for the intrinsic acid strength of FAU zeolites. For FAU zeolites the activation energy for the conversion of π-adsorbed isobutene into alkoxy species correlates well with the acid strength determined by the NH3 adsorption energies. Other zeolites such as MFI and CHA do not follow the scaling relations obtained for FAU; we ascribe this to the different van der Waals interactions and steric effects induced by zeolite framework topology.
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Affiliation(s)
- Chong Liu
- Inorganic
Materials Chemistry Group, Schuit Institute of Catalysis, and Institute for
Complex Molecular Systems, Eindhoven University
of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Ionut Tranca
- Inorganic
Materials Chemistry Group, Schuit Institute of Catalysis, and Institute for
Complex Molecular Systems, Eindhoven University
of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Rutger A. van Santen
- Inorganic
Materials Chemistry Group, Schuit Institute of Catalysis, and Institute for
Complex Molecular Systems, Eindhoven University
of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Emiel J. M. Hensen
- Inorganic
Materials Chemistry Group, Schuit Institute of Catalysis, and Institute for
Complex Molecular Systems, Eindhoven University
of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Evgeny A. Pidko
- Inorganic
Materials Chemistry Group, Schuit Institute of Catalysis, and Institute for
Complex Molecular Systems, Eindhoven University
of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
- ITMO
University, Lomonosova
9, St. Petersburg, 191002, Russia
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10
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Chu Y, Li G, Huang L, Yi X, Xia H, Zheng A, Deng F. External or internal surface of H-ZSM-5 zeolite, which is more effective for the Beckmann rearrangement reaction? Catal Sci Technol 2017. [DOI: 10.1039/c7cy00377c] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The influence of Brønsted acid site location on the Beckmann rearrangement reaction over H-ZSM-5 zeolite has been explored.
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Affiliation(s)
- Yueying Chu
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics
- National Center for Magnetic Resonance in Wuhan
- Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences
- Wuhan 430071
- P. R. China
| | - Guangchao Li
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics
- National Center for Magnetic Resonance in Wuhan
- Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences
- Wuhan 430071
- P. R. China
| | - Ling Huang
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics
- National Center for Magnetic Resonance in Wuhan
- Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences
- Wuhan 430071
- P. R. China
| | - Xianfeng Yi
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics
- National Center for Magnetic Resonance in Wuhan
- Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences
- Wuhan 430071
- P. R. China
| | - Hongqiang Xia
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics
- National Center for Magnetic Resonance in Wuhan
- Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences
- Wuhan 430071
- P. R. China
| | - Anmin Zheng
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics
- National Center for Magnetic Resonance in Wuhan
- Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences
- Wuhan 430071
- P. R. China
| | - Feng Deng
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics
- National Center for Magnetic Resonance in Wuhan
- Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences
- Wuhan 430071
- P. R. China
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11
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The Distribution and Strength of Brönsted Acid Sites on the Multi-Aluminum Model of FER Zeolite: A Theoretical Study. Catalysts 2017. [DOI: 10.3390/catal7010011] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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12
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Patet RE, Caratzoulas S, Vlachos DG. Adsorption in zeolites using mechanically embedded ONIOM clusters. Phys Chem Chem Phys 2016; 18:26094-26106. [DOI: 10.1039/c6cp03266d] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
We have explored mechanically embedded three-layer QM/QM/MM ONIOM models for computational studies of binding in Al-substituted zeolites.
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Affiliation(s)
- Ryan E. Patet
- Department of Chemical and Biomolecular Engineering
- University of Delaware
- Newark
- USA
- Catalysis Center for Energy Innovation (CCEI)
| | - Stavros Caratzoulas
- Department of Chemical and Biomolecular Engineering
- University of Delaware
- Newark
- USA
- Catalysis Center for Energy Innovation (CCEI)
| | - Dionisios G. Vlachos
- Department of Chemical and Biomolecular Engineering
- University of Delaware
- Newark
- USA
- Catalysis Center for Energy Innovation (CCEI)
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13
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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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14
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Dai W, Sun X, Tang B, Wu G, Li L, Guan N, Hunger M. Verifying the mechanism of the ethene-to-propene conversion on zeolite H-SSZ-13. J Catal 2014. [DOI: 10.1016/j.jcat.2014.03.006] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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15
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Wang N, Zhang M, Yu Y. Density functional calculations on the distribution of Ti in a Y zeolite and its influence on acidity. RSC Adv 2014. [DOI: 10.1039/c3ra42530d] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
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16
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An ONIOM study on the distribution, local structure and strength of Brönsted acid sites in FER zeolite. COMPUT THEOR CHEM 2014. [DOI: 10.1016/j.comptc.2013.10.021] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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17
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Vazhnova T, Lukyanov DB. Fourier self-deconvolution of the IR spectra as a tool for investigation of distinct functional groups in porous materials: Brønsted acid sites in zeolites. Anal Chem 2013; 85:11291-6. [PMID: 24219854 DOI: 10.1021/ac4020337] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
For many decades, IR and FT-IR spectroscopy has generated valuable information about different functional groups in zeolites, metal-organic frameworks (MOFs), and other porous materials. However, this technique cannot distinguish between functional groups in different local environments. Our study demonstrates that this limitation could be overcome by using Fourier self-deconvolution of infrared spectra (FSD-IR). We apply this method to study three acidic mordenite zeolites and show (i) that these zeolites contain six distinct Brønsted acid sites (BAS) as opposed to 2-4 different BAS previously considered in literature and (ii) that the relative amounts of these BAS are different in the three zeolites examined. We then analyze possible locations of six BAS in the mordenite structure and explain a number of conflicting results in literature. On this basis, we conclude that the FSD-IR method allows direct visualization and examination of distributions of distinct BAS in zeolites, thus providing a unique research opportunity, which no other method can provide. Given the similarities in the IR analysis of different functional groups in solids, we expect that the FSD-IR method will be also instrumental in the research into other porous materials, such as solid oxides and MOFs. The latter point is illustrated by FSD of the IR spectrum of hydroxyl groups in a sample of α-alumina.
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Affiliation(s)
- Tanya Vazhnova
- Catalysis and Reaction Engineering Group, Department of Chemical Engineering, University of Bath , Bath BA2 7AY, United Kingdom
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18
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Grajciar L, Areán CO, Pulido A, Nachtigall P. Periodic DFT investigation of the effect of aluminium content on the properties of the acid zeolite H-FER. Phys Chem Chem Phys 2010; 12:1497-506. [DOI: 10.1039/b917969k] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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19
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Boekfa B, Choomwattana S, Khongpracha P, Limtrakul J. Effects of the zeolite framework on the adsorptions and hydrogen-exchange reactions of unsaturated aliphatic, aromatic, and heterocyclic compounds in ZSM-5 zeolite: a combination of perturbation theory (MP2) and a newly developed density functional theory (M06-2X) in ONIOM scheme. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:12990-12999. [PMID: 19899817 DOI: 10.1021/la901841w] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The confinement effect on the adsorption and reaction mechanism of unsaturated aliphatic, aromatic and heterocyclic compounds on H-ZSM-5 zeolite has been investigated by the four ONIOM methods (MP2:M06-2X), (MP2:B3LYP), (MP2:HF), and (MP2:UFF). The H-ZSM-5 'nanoreactor' porous intersection, where chemical reactions take place, is represented by a quantum cluster of 34 tetrahedral units. Ethene, benzene, ethylbenzene, and pyridine are chosen to represent reactions of various adsorbates of aliphatic, aromatic and heterocyclic compounds. Among the four combined methods, (MP2:M06-2X) outperforms the others. The results confirm that the method that takes weak interactions, especially the van der Waals interaction, into account is essential for describing the confinement effect from the zeolite framework. The effects of the infinite zeolitic framework on the cluster model are also included by a set of point charges generated by the embedded ONIOM model. The energies for the adsorption of ethene, benzene, ethylbenzene, and pyridine on H-ZSM-5 from an embedded ONIOM(MP2:M06-2X) calculation are predicted to be -14.0, -19.8, -24.7, and -48.4 kcal/mol, respectively, which are very close to available experimental observations. The adsorption energy of pyridine agrees well with the experiment data of -47.6 kcal/mol. We also applied the same computational methodology on the systematic investigation of the H/H exchange reaction of benzene and ethylbenzene with the acidic H-ZSM-5 zeolite. The H/H exchange reaction was found to take place in a single concerted step. The calculated apparent activation energies for benzene and ethylbenzene are 12.6 and 4.9 kcal/mol, which can be compared to the experimental estimates of 11.0 and 6.9 kcal/mol, respectively. The confinement effect of the extended zeolite framework has been clearly demonstrated not only to stabilize the adsorption complexes but also to improve their corresponding activation energies to approach the experimental benchmark.
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Affiliation(s)
- Bundet Boekfa
- Laboratory for Computational and Applied Chemistry, Chemistry Department, Faculty of Science, Kasetsart University, Bangkok 10900, Thailand
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20
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Torrisi A, Mellot-Draznieks C, Bell RG. Impact of ligands on CO2 adsorption in metal-organic frameworks: First principles study of the interaction of CO2 with functionalized benzenes. I. Inductive effects on the aromatic ring. J Chem Phys 2009; 130:194703. [DOI: 10.1063/1.3120909] [Citation(s) in RCA: 115] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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21
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Spectroscopic and quantum chemical study of the Brønsted acid sites in zeolite L channels with acidochromic cyanine dyes. J Photochem Photobiol A Chem 2009. [DOI: 10.1016/j.jphotochem.2009.02.017] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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22
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Nachtigall P, Bludský O, Grajciar L, Nachtigallová D, Delgado MR, Areán CO. Computational and FTIR spectroscopic studies on carbon monoxide and dinitrogen adsorption on a high-silica H-FER zeolite. Phys Chem Chem Phys 2008; 11:791-802. [PMID: 19290325 DOI: 10.1039/b812873a] [Citation(s) in RCA: 70] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Adsorption (at a low temperature) of carbon monoxide and dinitrogen on a high-silica ferrierite-type zeolite (H-FER, Si : Al = 27.5 : 1) was investigated by means of variable temperature infrared spectroscopy and theoretical calculations at the periodic DFT level. This combined experimental and computational approach led to detailed characterization of several types of hydrogen-bonded OHCO and OHN(2) complexes, formed by interaction between the adsorbed molecules and the Brønsted acid OH groups of the zeolite. CO or N(2), forming linear complexes with OH groups pointing towards a sufficiently ample void space, show the largest adsorption enthalpy which was found to be in the (approximate) range of -25 to -29 kJ mol(-1) for CO and -15 to -19 kJ mol(-1) for N(2). Less stable OHCO or OHN(2) complexes can be formed when either the Brønsted acid OH group is involved in intra-zeolite hydrogen bonding or when the free space available is too small to allow formation of linear complexes without previous re-location of the proton of the OH group involved. The details of experimental IR spectra in the O-H, C-O, and N-N stretching regions could be interpreted on the basis of good agreement between experimental and calculated results.
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Affiliation(s)
- P Nachtigall
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo nám. 2, 166 10, Praha 6, Czech Republic
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Nachtigallová D, Vrbka L, Bludský O, Nachtigall P. Interaction of acetonitrile with Na-zeolites: adsorption modes and vibrational dynamics in the zeolite channels and cavities. Phys Chem Chem Phys 2008; 10:4189-98. [DOI: 10.1039/b803024c] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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24
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Suzuki K, Sastre G, Katada N, Niwa M. Quantitative Measurements of Brønsted Acidity of Zeolites by Ammonia IRMS–TPD Method and Density Functional Calculation. CHEM LETT 2007. [DOI: 10.1246/cl.2007.1034] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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25
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Zhang Y, Li ZH, Truhlar DG. Computational Requirements for Simulating the Structures and Proton Activity of Silicaceous Materials. J Chem Theory Comput 2007; 3:593-604. [DOI: 10.1021/ct6002884] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yuan Zhang
- Department of Chemistry and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455-0431
| | - Zhen Hua Li
- Department of Chemistry and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455-0431
| | - Donald G. Truhlar
- Department of Chemistry and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455-0431
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Déroche I, Maurin G, Llewellyn P, Castro M, Wright P, Bejblova M, Cejka J. A computational study of the stretching frequencies of Brønsted acid sites in SAPO STA-7: preliminary comparison with infrared. ACTA ACUST UNITED AC 2007. [DOI: 10.1016/s0167-2991(07)81044-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/07/2023]
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27
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Suzuki K, Sastre G, Katada N, Niwa M. Ammonia IRMS-TPD measurements and DFT calculation on acidic hydroxyl groups in CHA-type zeolites. Phys Chem Chem Phys 2007; 9:5980-7. [DOI: 10.1039/b711961e] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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28
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Zheng A, Chen L, Yang J, Zhang M, Su Y, Yue Y, Ye C, Deng F. Combined DFT Theoretical Calculation and Solid-State NMR Studies of Al Substitution and Acid Sites in Zeolite MCM-22. J Phys Chem B 2005; 109:24273-9. [PMID: 16375424 DOI: 10.1021/jp0527249] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The distributions of Brönsted acidic protons and their acid strengths in zeolite H-MCM-22 have been characterized by density functional theory (DFT) calculations as well as magic angle spinning (MAS) NMR experiments. The embedded scheme (ONIOM) that combines the quantum mechanical (QM) description of active sites and semiempirical AM1 treatment of the neighboring environment was applied to predict the aluminum substitution mechanism and proton affinity (PA), as well as adsorption behaviors of acetone and trimethylphosphine oxide (TMPO) onto the zeolite. Our theoretical results indicate that the Al substitution takes place in the order of Al1-OH-Si2 > Al8-OH-Si8 > Al5-OH-Si7. The DFT theoretical and NMR experimental results suggest that the acid strength of the three Brönsted acid sites in H-MCM-22 zeolite is slightly lower than that of H-ZSM-5 zeolite and the accessible Brönsted acidic protons most likely reside in both the supercages (at the Al8-OH-Si8 and Al1-OH-Si2 sites) and external surface pocket (at the Al8-OH-Si8 site) rather than in the sinusoidal channels (Al5-OH-Si7), with the Al1-OH-Si2 site having the strongest acid strength (as probed by TMPO). This may partially explain the special selectivity of acid-catalyzed reactions occurring inside the channels of H-MCM-22 zeolite.
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Affiliation(s)
- Anmin Zheng
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, the Chinese Academy of Sciences, Wuhan 430071, China
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Thomas JM, Raja R. Design of a "green" one-step catalytic production of epsilon-caprolactam (precursor of nylon-6). Proc Natl Acad Sci U S A 2005; 102:13732-6. [PMID: 16166260 PMCID: PMC1236590 DOI: 10.1073/pnas.0506907102] [Citation(s) in RCA: 105] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2005] [Indexed: 11/18/2022] Open
Abstract
The ever-increasing industrial demand for nylon-6 (polycaprolactam) necessitates the development of environmentally benign methods of producing its precursor, epsilon-caprolactam, from cyclohexanone. It is currently manufactured in two popular double-step processes, each of which uses highly aggressive reagents, and each generates substantial quantities of largely unwanted ammonium sulfate as by-product. Here we describe a viable laboratory-scale, single-step, solvent-free process of producing epsilon-caprolactam using a family of designed bifunctional, heterogeneous, nanoporous catalysts containing isolated acidic and redox sites, which smoothly convert cyclohexanone to epsilon-caprolactam with selectivities in the range 65-78% in air and ammonia at 80 degrees C. The catalysts are microporous (pore diameter 7.3 A) aluminophosphates in which small fractions of the Al(III)O4(5-) and P(V)O4(3-) tetrahedra constituting the 4-connected open framework are replaced by Co(III)PO4(5-) and Si(IV)O4(4-) tetrahedra, which become the loci of the redox and acidic centers, respectively. The catalysts may be further optimized, and already may be so designed as to generate selectivities of approximately 80% for the intermediate oxime, formed from NH2OH, which is produced in situ within the pore system. The advantages of such designed heterogeneous catalysts, and their application to a range of other chemical conversions, are also adumbrated.
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Affiliation(s)
- John Meurig Thomas
- Department of Materials Science, University of Cambridge, Cambridge CB2 3QZ, United Kingdom.
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Niwa M, Suzuki K, Katada N, Kanougi T, Atoguchi T. Ammonia IRMS-TPD Study on the Distribution of Acid Sites in Mordenite. J Phys Chem B 2005; 109:18749-57. [PMID: 16853412 DOI: 10.1021/jp051304g] [Citation(s) in RCA: 94] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Using an IRMS-TPD (temperature programmed desorption) of ammonia, we studied the nature, strength, crystallographic location, and distribution of acid sites of mordenite. In this method, infrared spectroscopy (IR) and mass spectroscopy (MS) work together to follow the thermal behavior of adsorbed and desorbed ammonia, respectively; therefore, adsorbed species were identified, and their thermal behavior was directly connected with the desorption of ammonia during an elevation of temperature. IR-measured TPD of the NH4(+) cation was similar to MS-measured TPD, thus showing the nature of Brønsted acidity. From the behavior of OH bands, it was found that the Brønsted acid sites consisted of two kinds of OH bands at high and low wavenumbers, ascribable to OH bands situated on 12- and 8-member rings (MR) of mordenite structure, respectively. The amount and strength of these Brønsted hydroxyls were measured quantitatively based on a theoretical equation using a curve fitting method. Up to ca. 30% of the exchange degree, NH4(+) was exchanged with Na+ on the 12-MR to arrive at saturation; therefore, in this region, the Brønsted acid site was situated on the large pore of 12-MR. The NH4(+) cation was then exchanged with Na+ on 8-MR, and finally exceeded the amount on 12-MR. In the 99% NH4-mordenite, Brønsted acid sites were located predominantly on the 8-MR more than on the 12-MR. Irrespective of the NH4(+) exchange degree, the strengths deltaH of Brønsted OH were 145 and 153 kJ mol(-1) on the 12- and 8-MR, respectively; that is, the strength of Brønsted acid site on the 8-MR was larger than that on the 12-MR. A density functional theory (DFT) calculation supported the difference in the strengths of the acid sites. Catalytic cracking activity of the Brønsted acid sites on the 8-MR declined rapidly, while that on the 12-MR was remarkably kept. The difference in strength and/or steric capacity may cause such a difference in the life of a catalyst.
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Affiliation(s)
- Miki Niwa
- Department of Materials Science, Faculty of Engineering, Tottori University 4-101, Koyama-minami, Tottori, 680-8552 Japan.
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Tantanak D, Limtrakul J, Gleeson MP. Probing the Structural and Electronic Factors Affecting the Adsorption and Reactivity of Alkenes in Acidic Zeolites Using DFT Calculations and Multivariate Statistical Methods. J Chem Inf Model 2005; 45:1303-12. [PMID: 16180907 DOI: 10.1021/ci0500583] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Quantum mechanical (QM) cluster calculations have been performed on a model of ZSM-5 at DFT and MP2 levels. We investigated how the adsorption energies and the energetics of alkoxide intermediate formation of six different alkene substrates, ethene, propene, 1-butene, cis/trans butene, and isobutene, vary in this zeolite model. An analysis of the DFT geometric, electronic, and energetic parameters of the zeolite-substrate complexes, transition states, and alkoxide intermediates is performed using principal components analysis (PCA) and partial least squares (PLS). These deliver an insight into the correlated changes that occur between molecular structure and energy along the reaction coordinate between the physisorbed and chemisorbed species within the zeolite. To the best of our knowledge, this is the first occasion multivariate techniques such as PCA or PLS have been employed to profile the changes in electronics, distances, and angles in QM calculations of catalytic systems such as zeolites. We find the calculated adsorption and the alkoxide intermediate energies correlate strongly with the absolute charge on the substrate and the length of the substrate double bond. The transition states' energies are not affected by the zeolite framework as modeled, which explains why they correlate strongly with the gas-phase substrate protonation energy. Our cluster results show that for ethene, propene, 1-butene, and isobutene, the relative energetics associated with the formation of the alkoxide intermediate in ZSM-5 follow the same trends as calculations where the effects of the framework are included.
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Affiliation(s)
- Duangkamol Tantanak
- Chemistry Department, Faculty of Science, King Mongkut's Institute of Technology Ladkrabang, Bangkok 10520, Thailand.
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Simperler A, Bell RG, Anderson MW. Probing the Acid Strength of Brønsted Acidic Zeolites with Acetonitrile: Quantum Chemical Calculation of 1H, 15N, and 13C NMR Shift Parameters. J Phys Chem B 2004. [DOI: 10.1021/jp035674l] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Alexandra Simperler
- Davy Faraday Research Laboratory, The Royal Institution of Great Britain, 21 Albemarle Street, London W1S 4BS, United Kingdom, and UMIST Centre for Microporous Materials, Department of Chemistry, P.O. Box 88, Manchester M60 1QD, United Kingdom
| | - Robert G. Bell
- Davy Faraday Research Laboratory, The Royal Institution of Great Britain, 21 Albemarle Street, London W1S 4BS, United Kingdom, and UMIST Centre for Microporous Materials, Department of Chemistry, P.O. Box 88, Manchester M60 1QD, United Kingdom
| | - Michael W. Anderson
- Davy Faraday Research Laboratory, The Royal Institution of Great Britain, 21 Albemarle Street, London W1S 4BS, United Kingdom, and UMIST Centre for Microporous Materials, Department of Chemistry, P.O. Box 88, Manchester M60 1QD, United Kingdom
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