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Kobayashi A, Yamagami J, Ranjan S, Takamizawa S, Honda H. Solid state 1H, 7Li, and 13C NMR studies on new ionic plastic crystals of crown ether-Li-TFSA complexes. Phys Chem Chem Phys 2023; 25:27836-27847. [PMID: 37814883 DOI: 10.1039/d3cp02614k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/11/2023]
Abstract
This study provides the first evidence that a Li ion can form ionic plastic crystals using crown ether with a bis-(trifluoromethanesulphonyl) amide (TFSA) anion. 1H, 7Li, and 13C nuclear-magnetic-resonance (NMR) measurements of the 15-crown-5-Li-TFSA complex revealed that the constituents underwent isotropic reorientation in the plastic crystalline phase. The NMR data of the 12-crown-4-Li-TFSA salt showed that the complex is a rotator crystal (the complexes are denoted as [Li 15C5] and [Li 12C4] in this paper). The X-ray diffraction (XRD) reflection patterns of the [Li 15C5] crystal recorded in the highest-temperature solid phase (plastic phase) could be indexed to a cubic structure. Conversely, [Li 12C4] could be fitted to a trigonal structure. In this study, [M (3n)Cn] (M = Li, Na, K; n = 4-6) complexes were also prepared, and NMR, DSC, XRD, and electrical conductivity measurements were performed. Based on these results, we additionally revealed that the [Na 15C5] and [K (15C5)2] complexes are also new rotator crystals. Single-crystal XRD measurements also revealed that the [Na 15C5] compound has two stable sites in the crystal. Activation energies of molecular motions in the [M (3n)Cn] crystals were estimated using 1H NMR relaxation time (T1 and T2) measurements. The electrical conductivity measurements of [Li 12C4], [Li 15C5], and [Na 15C5] showed high ionic conductivities (∼10-2 S cm-1).
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Affiliation(s)
- Akira Kobayashi
- Graduate School of Nanobioscience, Yokohama City University, Kanazawa-ku, Yokohama, 236-0027, Japan
| | - Jun Yamagami
- Faculty of Science, Yokohama City University, Kanazawa-ku, Yokohama, 236-0027, Japan
| | - Subham Ranjan
- Graduate School of Nanobioscience, Yokohama City University, Kanazawa-ku, Yokohama, 236-0027, Japan
| | - Satoshi Takamizawa
- Graduate School of Nanobioscience, Yokohama City University, Kanazawa-ku, Yokohama, 236-0027, Japan
- Faculty of Science, Yokohama City University, Kanazawa-ku, Yokohama, 236-0027, Japan
| | - Hisashi Honda
- Graduate School of Nanobioscience, Yokohama City University, Kanazawa-ku, Yokohama, 236-0027, Japan
- Faculty of Science, Yokohama City University, Kanazawa-ku, Yokohama, 236-0027, Japan
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Yamada Y, Kashimoto E, Honda H. New Chemical Family of [n-CxH(2x+1)NEt3][BEt3Me] Showing Ionic Plastic-Crystal (x = 4, 5), Rotator-Crystal (x = 6, 7) and Liquid-Crystal Phases (x = 8–16). BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2019. [DOI: 10.1246/bcsj.20190085] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yudai Yamada
- International College of Arts and Sciences, Yokohama City University, Kanazawa-ku, Yokohama, Kanagawa 236-0027, Japan
| | - Erina Kashimoto
- International College of Arts and Sciences, Yokohama City University, Kanazawa-ku, Yokohama, Kanagawa 236-0027, Japan
| | - Hisashi Honda
- International College of Arts and Sciences, Yokohama City University, Kanazawa-ku, Yokohama, Kanagawa 236-0027, Japan
- Graduate School of Nanobioscience, Yokohama City University, Kanazawa-ku, Yokohama, Kanagawa 236-0027, Japan
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Kotani Y, Honda H. 1H and 13C NMR Studies on New Ionic Plastic Crystals Constructed by Ellipsoidal Cations with [BEt3Me] Anion. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2019. [DOI: 10.1246/bcsj.20180320] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yuka Kotani
- International College of Arts and Sciences, Yokohama City University, Kanazawa-ku, Yokohama, Kanagawa 236-0027, Japan
| | - Hisashi Honda
- International College of Arts and Sciences, Yokohama City University, Kanazawa-ku, Yokohama, Kanagawa 236-0027, Japan
- Graduate School of Nanobioscience, Yokohama City University, Kanazawa-ku, Yokohama, Kanagawa 236-0027, Japan
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