1
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Zhao X, Zeng S, Zhang X, Deng Q, Li X, Yu W, Zhu K, Xu S, Liu J, Han L. Generating Assembled MFI Nanocrystals with Reduced
b
‐Axis through Structure‐Directing Agent Exchange Induced Recrystallization. Angew Chem Int Ed Engl 2021; 60:13959-13968. [DOI: 10.1002/anie.202017031] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Revised: 03/29/2021] [Indexed: 12/23/2022]
Affiliation(s)
- Xiaoling Zhao
- UNILAB State Key Laboratory of Chemical Engineering East China University of Science and Technology Shanghai 200237 P. R. China
| | - Shu Zeng
- National Engineering Laboratory for Methanol to Olefins Dalian National Laboratory for Clean Energy Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 P. R. China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Xueliang Zhang
- School of Chemical Science and Engineering Tongji University Shanghai 200092 P. R. China
- School of Chemical and Chemical Engineering Shanghai Jiao Tong University Shanghai 200024 China
| | - Quanzheng Deng
- School of Chemical Science and Engineering Tongji University Shanghai 200092 P. R. China
| | - Xiujie Li
- National Engineering Laboratory for Methanol to Olefins Dalian National Laboratory for Clean Energy Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 P. R. China
| | - Wenguang Yu
- National Engineering Laboratory for Methanol to Olefins Dalian National Laboratory for Clean Energy Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 P. R. China
| | - Kake Zhu
- UNILAB State Key Laboratory of Chemical Engineering East China University of Science and Technology Shanghai 200237 P. R. China
| | - Shutao Xu
- National Engineering Laboratory for Methanol to Olefins Dalian National Laboratory for Clean Energy Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 P. R. China
| | - Jichang Liu
- UNILAB State Key Laboratory of Chemical Engineering East China University of Science and Technology Shanghai 200237 P. R. China
| | - Lu Han
- School of Chemical Science and Engineering Tongji University Shanghai 200092 P. R. China
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2
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Generating Assembled MFI Nanocrystals with Reduced
b
‐Axis through Structure‐Directing Agent Exchange Induced Recrystallization. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202017031] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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3
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Olszowka JE, Pashkova V, Kornas A, Dedecek J, Brus J, Urbanova M, Tabor E, Klein P, Brabec L, Mlekodaj K. Influence of the ultrasonic-assisted synthesis on Al distribution in a MOR zeolite: from gel to resulting material. NEW J CHEM 2021. [DOI: 10.1039/d1nj00685a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two Al-rich mordenite samples were prepared by the same synthesis procedure except for the activation of the gel for which classical stirring and ultrasonic pretreatment was used.
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Affiliation(s)
- Joanna E. Olszowka
- J. Heyrovský Institute of Physical Chemistry of the CAS, v.v.i. Dolejškova 2155/3, 182 23 Prague, Czech Republic
| | - Veronika Pashkova
- J. Heyrovský Institute of Physical Chemistry of the CAS, v.v.i. Dolejškova 2155/3, 182 23 Prague, Czech Republic
| | - Agnieszka Kornas
- J. Heyrovský Institute of Physical Chemistry of the CAS, v.v.i. Dolejškova 2155/3, 182 23 Prague, Czech Republic
| | - Jiri Dedecek
- J. Heyrovský Institute of Physical Chemistry of the CAS, v.v.i. Dolejškova 2155/3, 182 23 Prague, Czech Republic
| | - Jiri Brus
- Institute of Macromolecular Chemistry of the CAS, v.v.i. Heyrovského nám. 1888, 162 00 Prague, Czech Republic
| | - Martina Urbanova
- J. Heyrovský Institute of Physical Chemistry of the CAS, v.v.i. Dolejškova 2155/3, 182 23 Prague, Czech Republic
- Institute of Macromolecular Chemistry of the CAS, v.v.i. Heyrovského nám. 1888, 162 00 Prague, Czech Republic
| | - Edyta Tabor
- J. Heyrovský Institute of Physical Chemistry of the CAS, v.v.i. Dolejškova 2155/3, 182 23 Prague, Czech Republic
| | - Petr Klein
- J. Heyrovský Institute of Physical Chemistry of the CAS, v.v.i. Dolejškova 2155/3, 182 23 Prague, Czech Republic
| | - Libor Brabec
- J. Heyrovský Institute of Physical Chemistry of the CAS, v.v.i. Dolejškova 2155/3, 182 23 Prague, Czech Republic
| | - Kinga Mlekodaj
- J. Heyrovský Institute of Physical Chemistry of the CAS, v.v.i. Dolejškova 2155/3, 182 23 Prague, Czech Republic
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4
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Preparation of hydrophobic MFI zeolites containing hierarchical micro-mesopores using seeds functionalized with octyltriethoxysilane. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2019.124109] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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5
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Fe/ZSM-5 catalysts for ammonia decomposition to COx-free hydrogen: Effect of SiO2/Al2O3 ratio. MOLECULAR CATALYSIS 2018. [DOI: 10.1016/j.mcat.2018.05.027] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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6
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Vallaey B, Radhakrishnan S, Heylen S, Chandran CV, Taulelle F, Breynaert E, Martens JA. Reversible room temperature ammonia gas absorption in pore water of microporous silica-alumina for sensing applications. Phys Chem Chem Phys 2018; 20:13528-13536. [PMID: 29726873 DOI: 10.1039/c8cp01586d] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Microporous silica and silica-alumina powders exhibit a reversible uptake and release of ammonia gas from water vapor containing gas mixtures at ambient temperature, with capacities of 0.9 and 2.0 mmol g-1 in the presence of 100 ppm and 1000 ppm NH3, respectively. The ammonia trapping mechanism was revealed using a combination of direct excitation 1H MAS, 1H-1H EXSY and 1H DQ-SQ NMR spectroscopy, indicating that the major part of the captured ammonia is blended in the hydrogen bonded water network in the pores of the adsorbent. A small fraction is irreversibly bound as result of protonation and chemisorption. While common ammonia adsorbents need thermal regeneration, microporous silica-alumina can be regenerated by sweeping with dry gas at ambient temperature, desorbing the physisorbed fraction together with occluded water. As carbon dioxide does not interfere with the ammonia absorption process, this reversible absorption process of ammonia gas at ambient temperature is particularly attractive for sensor applications.
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Affiliation(s)
- Brecht Vallaey
- KU Leuven, Centre for Surface Chemistry and Catalysis, Celestijnenlaan 200F, Leuven B-3001, Belgium.
| | - Sambhu Radhakrishnan
- KU Leuven, Centre for Surface Chemistry and Catalysis, Celestijnenlaan 200F, Leuven B-3001, Belgium.
| | - Steven Heylen
- KU Leuven, Centre for Surface Chemistry and Catalysis, Celestijnenlaan 200F, Leuven B-3001, Belgium.
| | - C Vinod Chandran
- KU Leuven, Centre for Surface Chemistry and Catalysis, Celestijnenlaan 200F, Leuven B-3001, Belgium.
| | - Francis Taulelle
- KU Leuven, Centre for Surface Chemistry and Catalysis, Celestijnenlaan 200F, Leuven B-3001, Belgium.
| | - Eric Breynaert
- KU Leuven, Centre for Surface Chemistry and Catalysis, Celestijnenlaan 200F, Leuven B-3001, Belgium.
| | - Johan A Martens
- KU Leuven, Centre for Surface Chemistry and Catalysis, Celestijnenlaan 200F, Leuven B-3001, Belgium.
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7
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Dib E, Mineva T, Veron E, Sarou-Kanian V, Fayon F, Alonso B. ZSM-5 Zeolite: Complete Al Bond Connectivity and Implications on Structure Formation from Solid-State NMR and Quantum Chemistry Calculations. J Phys Chem Lett 2018; 9:19-24. [PMID: 29232141 DOI: 10.1021/acs.jpclett.7b03050] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Al site distribution in the structurally complex and industrially important ZSM-5 zeolite is determined by studying the spectroscopic response of Al(OSi)4 units and using a self-consistent combination of up-to-date solid-state NMR correlations (29Si-27Al and 1H-27Al D-HMQC) and quantum chemistry methods (DFT-D). To unravel the driving forces behind specific Al sitting positions, our approach focuses on ZSM-5 containing its more efficient OSDA, tetrapropylammonium.
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Affiliation(s)
- Eddy Dib
- Institut Charles Gerhardt de Montpellier, ICGM-MACS, UMR 5253 CNRS-ENSCM-UM , 240 av. du Professeur Emile Jeanbrau, 34296 Montpellier Cedex 5, France
| | - Tzonka Mineva
- Institut Charles Gerhardt de Montpellier, ICGM-MACS, UMR 5253 CNRS-ENSCM-UM , 240 av. du Professeur Emile Jeanbrau, 34296 Montpellier Cedex 5, France
| | - Emmanuel Veron
- CNRS, CEMHTI UPR 3079, Univsité d'Orléans , F-45071 Orléans, France
| | | | - Franck Fayon
- CNRS, CEMHTI UPR 3079, Univsité d'Orléans , F-45071 Orléans, France
| | - Bruno Alonso
- Institut Charles Gerhardt de Montpellier, ICGM-MACS, UMR 5253 CNRS-ENSCM-UM , 240 av. du Professeur Emile Jeanbrau, 34296 Montpellier Cedex 5, France
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8
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Nazarchuk EV, Siidra OI, Kayukov RA. Synthesis and crystal-chemical features of two new uranyl chromates with the structures derived from [(UO2)(T6+O4)(H2O) n ]0 (T = Cr6+, S6+, Se6+, n = 0–2). RADIOCHEMISTRY 2016. [DOI: 10.1134/s1066362216060023] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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9
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Zhu H, Abou-Hamad E, Chen Y, Saih Y, Liu W, Samal AK, Basset JM. Organosilane with Gemini-Type Structure as the Mesoporogen for the Synthesis of the Hierarchical Porous ZSM-5 Zeolite. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:2085-2092. [PMID: 26854763 DOI: 10.1021/acs.langmuir.5b04383] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A new kind of organosilane (1,6-bis(diethyl(3-trimethoxysilylpropyl)ammonium) hexane bromide) with a gemini-type structure was prepared and used as a mesoporogen for the synthesis of hierarchical porous ZSM-5 zeolite. There are two quaternary ammonium centers along with double-hydrolyzable -RSi(OMe)3 fragments in the organosilane, which results in a strong interaction between this mesoporogen and silica-alumina gel. The organosilane can be easily incorporated into the ZSM-5 zeolite structure during the crystallization process, and it was finally removed by calcination, leading to secondary pores in ZSM-5. The synthesized ZSM-5 has been systematically studied by XRD, nitrogen adsorption, SEM, TEM, TG, and solid-state one-dimensional (1D) and two-dimensional (2D) NMR, which reveal information on its detailed structure. It has a hierarchical porosity system, which combines the intrinsic micropores coming from the crystalline structure and irregular mesopores created by the organosilane template. Moreover, the mesoposity including pore size and volume within ZSM-5 can be systematically tuned by changing the organosilane/TEOS ratio, which confirms that this organosilane has high flexibility of use as a template for the synthesis of hierarchical porous zeolite.
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Affiliation(s)
- Haibo Zhu
- KAUST Catalysis Center, King Abdullah University of Science and Technology , Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Edy Abou-Hamad
- KAUST Catalysis Center, King Abdullah University of Science and Technology , Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Yin Chen
- College of Chemistry and Chemical Engineering, Central South University , Changsha, Hunan 410083, P. R. China
| | - Youssef Saih
- KAUST Catalysis Center, King Abdullah University of Science and Technology , Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Weibing Liu
- KAUST Catalysis Center, King Abdullah University of Science and Technology , Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Akshaya Kumar Samal
- KAUST Catalysis Center, King Abdullah University of Science and Technology , Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Jean-Marie Basset
- KAUST Catalysis Center, King Abdullah University of Science and Technology , Thuwal 23955-6900, Kingdom of Saudi Arabia
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10
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Insights to Achieve a Better Control of Silicon-Aluminum Ratio and ZSM-5 Zeolite Crystal Morphology through the Assistance of Biomass. Catalysts 2016. [DOI: 10.3390/catal6020030] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
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11
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Yu Q, Li C, Tang X, Yi H. Studies on the Dual-Templating Function of TBA for the Formation of ZSM-11 Intergrowth Morphology. Ind Eng Chem Res 2015. [DOI: 10.1021/ie505003g] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Qingjun Yu
- Department
of Environmental Engineering, Civil and Environmental Engineering
School, University of Science and Technology Beijing, Beijing 100083, China
- State
Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao 266580, China
| | - Chunyi Li
- State
Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao 266580, China
| | - Xiaolong Tang
- Department
of Environmental Engineering, Civil and Environmental Engineering
School, University of Science and Technology Beijing, Beijing 100083, China
| | - Honghong Yi
- Department
of Environmental Engineering, Civil and Environmental Engineering
School, University of Science and Technology Beijing, Beijing 100083, China
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12
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Wang L, Wang L, Jiang W, Lin H. The investigation of order–disorder transition process of ZSM-5 induced by spark plasma sintering. J SOLID STATE CHEM 2014. [DOI: 10.1016/j.jssc.2014.01.024] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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13
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Koekkoek A, Kim W, Degirmenci V, Xin H, Ryoo R, Hensen E. Catalytic performance of sheet-like Fe/ZSM-5 zeolites for the selective oxidation of benzene with nitrous oxide. J Catal 2013. [DOI: 10.1016/j.jcat.2012.12.002] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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14
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Mesoporous SSZ-13 zeolite prepared by a dual-template method with improved performance in the methanol-to-olefins reaction. J Catal 2013. [DOI: 10.1016/j.jcat.2012.10.029] [Citation(s) in RCA: 134] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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15
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16
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17
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Gücüyener C, van den Bergh J, Joaristi AM, Magusin PCMM, Hensen EJM, Gascon J, Kapteijn F. Facile synthesis of the DD3R zeolite: performance in the adsorptive separation of buta-1,3-diene and but-2-ene isomers. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm13671b] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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18
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Koller H, Weiss M. Solid state NMR of porous materials : zeolites and related materials. Top Curr Chem (Cham) 2011; 306:189-227. [PMID: 21452082 DOI: 10.1007/128_2011_123] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Solid state NMR spectroscopy applied to the science of crystalline micro- and mesoporous silica materials over the past 10 years is reviewed. A survey is provided of framework structure and connectivity analyses from chemical shift effects of various elements in zeolites including heteroatom substitutions, framework defects and pentacoordinated silicon for zeolites containing fluoride ions. New developments in the field of NMR crystallography are included. Spatial host-guest ordering and confinement effects of zeolite-sorbate complexes are outlined, with special emphasis on NMR applications utilizing the heteronuclear dipolar interaction. The characterization of zeolite acid sites and in situ NMR on catalytic conversions is also included. Finally, the motion of extra-framework cations is investigated in two tutorial cases of sodium hopping in sodalite and cancrinite.
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Affiliation(s)
- Hubert Koller
- Institute of Physical Chemistry, University of Münster, Corrensstr. 28/30, 48149, Münster, Germany.
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19
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Multi-level Modeling of Silica–Template Interactions During Initial Stages of Zeolite Synthesis. Top Catal 2009. [DOI: 10.1007/s11244-009-9275-4] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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20
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From Molecular Fragments to Crystals: A UV Raman Spectroscopic Study on the Mechanism of Fe-ZSM-5 Synthesis. Chemistry 2009; 15:3268-76. [DOI: 10.1002/chem.200801916] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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21
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Bals S, Batenburg KJ, Liang D, Lebedev O, Van Tendeloo G, Aerts A, Martens JA, Kirschhock CEA. Quantitative Three-Dimensional Modeling of Zeotile Through Discrete Electron Tomography. J Am Chem Soc 2009; 131:4769-73. [DOI: 10.1021/ja8089125] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Sara Bals
- EMAT, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium, Vision Lab, University of Antwerp, Universiteitsplein 1, Wilrijk 2610, Belgium, and Centre for Surface Chemistry and Catalysis, Katholieke Universiteit Leuven, Kasteelpark Arenberg 23, Heverlee 3001, Belgium
| | - K. Joost Batenburg
- EMAT, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium, Vision Lab, University of Antwerp, Universiteitsplein 1, Wilrijk 2610, Belgium, and Centre for Surface Chemistry and Catalysis, Katholieke Universiteit Leuven, Kasteelpark Arenberg 23, Heverlee 3001, Belgium
| | - Duoduo Liang
- EMAT, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium, Vision Lab, University of Antwerp, Universiteitsplein 1, Wilrijk 2610, Belgium, and Centre for Surface Chemistry and Catalysis, Katholieke Universiteit Leuven, Kasteelpark Arenberg 23, Heverlee 3001, Belgium
| | - Oleg Lebedev
- EMAT, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium, Vision Lab, University of Antwerp, Universiteitsplein 1, Wilrijk 2610, Belgium, and Centre for Surface Chemistry and Catalysis, Katholieke Universiteit Leuven, Kasteelpark Arenberg 23, Heverlee 3001, Belgium
| | - Gustaaf Van Tendeloo
- EMAT, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium, Vision Lab, University of Antwerp, Universiteitsplein 1, Wilrijk 2610, Belgium, and Centre for Surface Chemistry and Catalysis, Katholieke Universiteit Leuven, Kasteelpark Arenberg 23, Heverlee 3001, Belgium
| | - Alexander Aerts
- EMAT, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium, Vision Lab, University of Antwerp, Universiteitsplein 1, Wilrijk 2610, Belgium, and Centre for Surface Chemistry and Catalysis, Katholieke Universiteit Leuven, Kasteelpark Arenberg 23, Heverlee 3001, Belgium
| | - Johan A. Martens
- EMAT, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium, Vision Lab, University of Antwerp, Universiteitsplein 1, Wilrijk 2610, Belgium, and Centre for Surface Chemistry and Catalysis, Katholieke Universiteit Leuven, Kasteelpark Arenberg 23, Heverlee 3001, Belgium
| | - Christine E. A. Kirschhock
- EMAT, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium, Vision Lab, University of Antwerp, Universiteitsplein 1, Wilrijk 2610, Belgium, and Centre for Surface Chemistry and Catalysis, Katholieke Universiteit Leuven, Kasteelpark Arenberg 23, Heverlee 3001, Belgium
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22
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Hung I, Uldry AC, Becker-Baldus J, Webber AL, Wong A, Smith ME, Joyce SA, Yates JR, Pickard CJ, Dupree R, Brown SP. Probing Heteronuclear 15N−17O and 13C−17O Connectivities and Proximities by Solid-State NMR Spectroscopy. J Am Chem Soc 2009; 131:1820-34. [DOI: 10.1021/ja805898d] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Ivan Hung
- Department of Physics, University of Warwick, Coventry CV4 7AL, U.K., School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews KY16 9SS, U.K., Tyndall National Institute, Lee Maltings, Prospect Row, Cork, Ireland, and TCM Group, Cavendish Laboratory, University of Cambridge, 19 J. J. Thomson Avenue, Cambridge CB3 OHE, U.K
| | - Anne-Christine Uldry
- Department of Physics, University of Warwick, Coventry CV4 7AL, U.K., School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews KY16 9SS, U.K., Tyndall National Institute, Lee Maltings, Prospect Row, Cork, Ireland, and TCM Group, Cavendish Laboratory, University of Cambridge, 19 J. J. Thomson Avenue, Cambridge CB3 OHE, U.K
| | - Johanna Becker-Baldus
- Department of Physics, University of Warwick, Coventry CV4 7AL, U.K., School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews KY16 9SS, U.K., Tyndall National Institute, Lee Maltings, Prospect Row, Cork, Ireland, and TCM Group, Cavendish Laboratory, University of Cambridge, 19 J. J. Thomson Avenue, Cambridge CB3 OHE, U.K
| | - Amy L. Webber
- Department of Physics, University of Warwick, Coventry CV4 7AL, U.K., School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews KY16 9SS, U.K., Tyndall National Institute, Lee Maltings, Prospect Row, Cork, Ireland, and TCM Group, Cavendish Laboratory, University of Cambridge, 19 J. J. Thomson Avenue, Cambridge CB3 OHE, U.K
| | - Alan Wong
- Department of Physics, University of Warwick, Coventry CV4 7AL, U.K., School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews KY16 9SS, U.K., Tyndall National Institute, Lee Maltings, Prospect Row, Cork, Ireland, and TCM Group, Cavendish Laboratory, University of Cambridge, 19 J. J. Thomson Avenue, Cambridge CB3 OHE, U.K
| | - Mark E. Smith
- Department of Physics, University of Warwick, Coventry CV4 7AL, U.K., School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews KY16 9SS, U.K., Tyndall National Institute, Lee Maltings, Prospect Row, Cork, Ireland, and TCM Group, Cavendish Laboratory, University of Cambridge, 19 J. J. Thomson Avenue, Cambridge CB3 OHE, U.K
| | - Siân A. Joyce
- Department of Physics, University of Warwick, Coventry CV4 7AL, U.K., School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews KY16 9SS, U.K., Tyndall National Institute, Lee Maltings, Prospect Row, Cork, Ireland, and TCM Group, Cavendish Laboratory, University of Cambridge, 19 J. J. Thomson Avenue, Cambridge CB3 OHE, U.K
| | - Jonathan R. Yates
- Department of Physics, University of Warwick, Coventry CV4 7AL, U.K., School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews KY16 9SS, U.K., Tyndall National Institute, Lee Maltings, Prospect Row, Cork, Ireland, and TCM Group, Cavendish Laboratory, University of Cambridge, 19 J. J. Thomson Avenue, Cambridge CB3 OHE, U.K
| | - Chris J. Pickard
- Department of Physics, University of Warwick, Coventry CV4 7AL, U.K., School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews KY16 9SS, U.K., Tyndall National Institute, Lee Maltings, Prospect Row, Cork, Ireland, and TCM Group, Cavendish Laboratory, University of Cambridge, 19 J. J. Thomson Avenue, Cambridge CB3 OHE, U.K
| | - Ray Dupree
- Department of Physics, University of Warwick, Coventry CV4 7AL, U.K., School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews KY16 9SS, U.K., Tyndall National Institute, Lee Maltings, Prospect Row, Cork, Ireland, and TCM Group, Cavendish Laboratory, University of Cambridge, 19 J. J. Thomson Avenue, Cambridge CB3 OHE, U.K
| | - Steven P. Brown
- Department of Physics, University of Warwick, Coventry CV4 7AL, U.K., School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews KY16 9SS, U.K., Tyndall National Institute, Lee Maltings, Prospect Row, Cork, Ireland, and TCM Group, Cavendish Laboratory, University of Cambridge, 19 J. J. Thomson Avenue, Cambridge CB3 OHE, U.K
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23
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Hirschinger J. Analytical solutions to several magic-angle spinning NMR experiments. SOLID STATE NUCLEAR MAGNETIC RESONANCE 2008; 34:210-223. [PMID: 19026524 DOI: 10.1016/j.ssnmr.2008.10.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2008] [Revised: 10/03/2008] [Accepted: 10/06/2008] [Indexed: 05/27/2023]
Abstract
Using the Anderson-Weiss (AW) formalism, analytical expressions of the NMR signal are obtained for the following magic-angle spinning (MAS) experiments: total suppression of sidebands (TOSS); phase adjusted spinning sidebands (PASS); rotational-echo double-resonance (REDOR); rotor-encoded REDOR (REREDOR); cross-polarization magic-angle spinning (CPMAS); exchange induced sidebands (EIS); one-dimensional exchange spectroscopy by sideband alternation (ODESSA); time-reverse ODESSA (trODESSA); centerband-only detection of exchange (CODEX). In order to test the validity of the AW approach, the Gaussian powder approximation is compared with exact powder calculations. A quantitative study of the effect of molecular dynamics on the efficiency of the TOSS and REDOR pulse sequences is then presented.
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Affiliation(s)
- Jérôme Hirschinger
- Institut de Chimie, UMR 7177 CNRS, Université Louis Pasteur, BP 296, 67008 Strasbourg Cedex, France.
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Fan F, Feng Z, Li G, Sun K, Ying P, Li C. In Situ UV Raman Spectroscopic Studies on the Synthesis Mechanism of Zeolite X. Chemistry 2008; 14:5125-9. [DOI: 10.1002/chem.200800560] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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deAzevedo ER, Saalwachter K, Pascui O, de Souza AA, Bonagamba TJ, Reichert D. Intermediate motions as studied by solid-state separated local field NMR experiments. J Chem Phys 2008; 128:104505. [DOI: 10.1063/1.2831798] [Citation(s) in RCA: 75] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Knight C, Balec R, Kinrade S. The Structure of Silicate Anions in Aqueous Alkaline Solutions. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200702986] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Knight CTG, Balec RJ, Kinrade SD. The Structure of Silicate Anions in Aqueous Alkaline Solutions. Angew Chem Int Ed Engl 2007; 46:8148-52. [PMID: 17886822 DOI: 10.1002/anie.200702986] [Citation(s) in RCA: 81] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Christopher T G Knight
- School of Chemical Sciences, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
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What has become of the Silicalite nanoslab? – Recent insights into key steps of template-directed silicalite-1 formation. ACTA ACUST UNITED AC 2007. [DOI: 10.1016/s0167-2991(07)81018-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Knight CTG, Wang J, Kinrade SD. Do zeolite precursor species really exist in aqueous synthesis media? Phys Chem Chem Phys 2006; 8:3099-103. [PMID: 16804611 DOI: 10.1039/b606419a] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The authors of a recent report in this journal (Houssin, et al., Phys. Chem. Chem. Phys., 2003, 5, 3518, ) claim that a tetrapropylammonium (TPA) silicate mixture with molar composition 4.41 TPAOH : 10 SiO(2) : 117 H(2)O contains high concentrations of two silicate oligomers, the prismatic double five-ring and a novel pentacyclic dodecamer. The latter species is derivative of the framework structure of silicalite-1, a MFI-type zeolite that spontaneously crystallizes from this system, and, indeed, the authors declare it to be a "nanoprecursor" in the TPA-mediated growth of silicalite-1. Using two-dimensional (29)Si COSY NMR spectroscopy to examine an equivalent mixture enriched in the (29)Si isotope, we show that the published peak assignments are erroneous. The signal assigned to the double five-ring corresponds, in reality, to the well-characterized pentacyclic octamer, while the three signals assigned to the pentacyclic dodecamer arise from three completely separate species. We find no evidence, therefore, to support the suggestion that silicalite-1 is formed by sequential condensation of precursor species any more complex than the simple orthosilicate anion.
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Affiliation(s)
- Christopher T G Knight
- School of Chemical Sciences, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, IL 61801, USA
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