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Kajihara K, Kato H, Takahashi R, Kanamura K, Mizoguchi H, Namatame Y, Sato H. Twinning by Merohedry and Thermal Expansion of Zeolitic Clathrasil Deca-dodecasil 3R. Inorg Chem 2020; 59:5600-5609. [PMID: 32223140 DOI: 10.1021/acs.inorgchem.0c00269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Rhombohedral crystal particles of zeolitic clathrasil deca-dodecasil 3R (DDR), hydrothermally synthesized from a mixture consisting of fumed silica, water, and 1-adamantanamine, were characterized by single-crystal and powder X-ray diffractometry as a function of temperature and pole figure analysis. The crystallite was bounded by six equivalent {101̅1} faces and exhibited twin-free appearance, whereas the structure was resolved with the binary twin by merohedry, defined by the twin point group 3̅2'/m'1, consisting of two twin domains with nearly equal volume fractions. This twinning modifies the positions of O atoms in the Si-O-Si framework while preserving the positions of Si atoms that define the topology of polyhedral cages. This type of twinning therefore does not disrupt the microporous channels via the 8-membered rings of the 19-hedral cages and little disturbs the adsorption and permeation of gas molecules in DDR. The cell volume of DDR increased monotonically with an increase in temperature up to ∼673 K accompanied by an elongation perpendicular to the [0001] axis and a shrinkage along the [0001] axis. Above ∼673 K, the cell volume decreased with temperature. These positive and negative volume expansion coefficients observed in this study were roughly one-half and one-third of the values currently available.
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Affiliation(s)
- Koichi Kajihara
- Department of Applied Chemistry for Environment, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, 1-1 minami-Osawa, Hachioji, Tokyo 192-0397, Japan
| | - Hirohiko Kato
- Department of Applied Chemistry for Environment, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, 1-1 minami-Osawa, Hachioji, Tokyo 192-0397, Japan
| | - Ryo Takahashi
- Department of Applied Chemistry for Environment, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, 1-1 minami-Osawa, Hachioji, Tokyo 192-0397, Japan
| | - Kiyoshi Kanamura
- Department of Applied Chemistry for Environment, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, 1-1 minami-Osawa, Hachioji, Tokyo 192-0397, Japan
| | - Hiroshi Mizoguchi
- Materials Research Center for Element Strategy, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama, Kanagawa 226-8503, Japan
| | - Yukiko Namatame
- Rigaku Corporation, 3-9-12 Matsubara, Akishima, Tokyo 196-8666, Japan
| | - Hiroyasu Sato
- Rigaku Corporation, 3-9-12 Matsubara, Akishima, Tokyo 196-8666, Japan
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Sládkovičová M, Smrčok Ľ, Mach P, Tunega D, Ramirez-Cuesta AJ. Inelastic neutron scattering and DFT study of 1,6-anhydro-β-d-glucopyranose (levoglucosan). J Mol Struct 2008. [DOI: 10.1016/j.molstruc.2007.03.042] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Ávalos M, Babiano R, Cintas P, Jiménez JL, Light ME, Palacios JC, Pérez EMS. Chiral N-Acyloxazolidines: Synthesis, Structure, and Mechanistic Insights. J Org Chem 2007; 73:661-72. [DOI: 10.1021/jo702149m] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Martín Ávalos
- Departamento de Química Orgánica e Inorgánica, QUOREX Research Group, Universidad de Extremadura, E-06071 Badajoz, Spain, and Department of Chemistry, University of Southampton, Southampton SO17 1BJ, United Kingdom
| | - Reyes Babiano
- Departamento de Química Orgánica e Inorgánica, QUOREX Research Group, Universidad de Extremadura, E-06071 Badajoz, Spain, and Department of Chemistry, University of Southampton, Southampton SO17 1BJ, United Kingdom
| | - Pedro Cintas
- Departamento de Química Orgánica e Inorgánica, QUOREX Research Group, Universidad de Extremadura, E-06071 Badajoz, Spain, and Department of Chemistry, University of Southampton, Southampton SO17 1BJ, United Kingdom
| | - José L. Jiménez
- Departamento de Química Orgánica e Inorgánica, QUOREX Research Group, Universidad de Extremadura, E-06071 Badajoz, Spain, and Department of Chemistry, University of Southampton, Southampton SO17 1BJ, United Kingdom
| | - Mark E. Light
- Departamento de Química Orgánica e Inorgánica, QUOREX Research Group, Universidad de Extremadura, E-06071 Badajoz, Spain, and Department of Chemistry, University of Southampton, Southampton SO17 1BJ, United Kingdom
| | - Juan C. Palacios
- Departamento de Química Orgánica e Inorgánica, QUOREX Research Group, Universidad de Extremadura, E-06071 Badajoz, Spain, and Department of Chemistry, University of Southampton, Southampton SO17 1BJ, United Kingdom
| | - Esther M. S. Pérez
- Departamento de Química Orgánica e Inorgánica, QUOREX Research Group, Universidad de Extremadura, E-06071 Badajoz, Spain, and Department of Chemistry, University of Southampton, Southampton SO17 1BJ, United Kingdom
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