Dynamics of Interlayer Cations in Tetramethylammonium-Saponite Studied by 1H, 2H NMR, and Electrical Conductivity Measurements

Shin'ichi Ishimaru; Miho Yamauchi; Ryuichi Ikeda

doi:10.1515/zna-1998-10-1116

Dynamics of Interlayer Cations in Tetramethylammonium-Saponite Studied by ¹H, ²H NMR, and Electrical Conductivity Measurements

Shin'ichi Ishimaru, Miho Yamauchi, Ryuichi Ikeda

研究成果: Article › 査読

抄録

We observed ¹H and ²H NMR spectra, ¹H NMR spin-lattice relaxation times, and electrical conductivities of water-saturated and anhydrous tetramethylammonium(TMA)-saponites between 100 and 415 K. The very weakly bound cations produced narrow ¹H and ²H NMR lines observed in both specimens down to 150 K. The temperature dependence of the ¹H NMR spin-lattice relaxation times in the water-saturated and anhydrous samples gave asymmetric minima attributable to the heterogeneous overall rotation and self-diffusion of the cations. The inhomogeneity of the cationic motions in the anhydrous TMA-saponite was greater than in the water-saturated one. From measurements of the electrical conductivity of anhydrous TMA-saponite a large anisotropic cation-diffusivity was concluded.

本文言語	English
ページ（範囲）	903-908
ページ数	6
ジャーナル	Zeitschrift fur Naturforschung - Section A Journal of Physical Sciences
巻	53
号	10-11
DOI	https://doi.org/10.1515/zna-1998-10-1116
出版ステータス	Published - 1998 11月
外部発表	はい

ASJC Scopus subject areas

数理物理学
物理学および天文学（全般）
物理化学および理論化学

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10.1515/zna-1998-10-1116

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title = "Dynamics of Interlayer Cations in Tetramethylammonium-Saponite Studied by 1H, 2H NMR, and Electrical Conductivity Measurements",

abstract = "We observed 1H and 2H NMR spectra, 1H NMR spin-lattice relaxation times, and electrical conductivities of water-saturated and anhydrous tetramethylammonium(TMA)-saponites between 100 and 415 K. The very weakly bound cations produced narrow 1H and 2H NMR lines observed in both specimens down to 150 K. The temperature dependence of the 1H NMR spin-lattice relaxation times in the water-saturated and anhydrous samples gave asymmetric minima attributable to the heterogeneous overall rotation and self-diffusion of the cations. The inhomogeneity of the cationic motions in the anhydrous TMA-saponite was greater than in the water-saturated one. From measurements of the electrical conductivity of anhydrous TMA-saponite a large anisotropic cation-diffusivity was concluded.",

keywords = "Cation Dynamics, Electrical Conductivity, Intercalation, NMR, Saponite",

author = "Shin'ichi Ishimaru and Miho Yamauchi and Ryuichi Ikeda",

note = "Funding Information: This work was partly supported by a Grant-in-aid for Scientific Research (B) No. 09440234 and (C) No. 10640554 from the Ministry of Education, Science, Sports and Culture, Japan.",

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AU - Ishimaru, Shin'ichi

AU - Yamauchi, Miho

AU - Ikeda, Ryuichi

N1 - Funding Information: This work was partly supported by a Grant-in-aid for Scientific Research (B) No. 09440234 and (C) No. 10640554 from the Ministry of Education, Science, Sports and Culture, Japan.

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N2 - We observed 1H and 2H NMR spectra, 1H NMR spin-lattice relaxation times, and electrical conductivities of water-saturated and anhydrous tetramethylammonium(TMA)-saponites between 100 and 415 K. The very weakly bound cations produced narrow 1H and 2H NMR lines observed in both specimens down to 150 K. The temperature dependence of the 1H NMR spin-lattice relaxation times in the water-saturated and anhydrous samples gave asymmetric minima attributable to the heterogeneous overall rotation and self-diffusion of the cations. The inhomogeneity of the cationic motions in the anhydrous TMA-saponite was greater than in the water-saturated one. From measurements of the electrical conductivity of anhydrous TMA-saponite a large anisotropic cation-diffusivity was concluded.

AB - We observed 1H and 2H NMR spectra, 1H NMR spin-lattice relaxation times, and electrical conductivities of water-saturated and anhydrous tetramethylammonium(TMA)-saponites between 100 and 415 K. The very weakly bound cations produced narrow 1H and 2H NMR lines observed in both specimens down to 150 K. The temperature dependence of the 1H NMR spin-lattice relaxation times in the water-saturated and anhydrous samples gave asymmetric minima attributable to the heterogeneous overall rotation and self-diffusion of the cations. The inhomogeneity of the cationic motions in the anhydrous TMA-saponite was greater than in the water-saturated one. From measurements of the electrical conductivity of anhydrous TMA-saponite a large anisotropic cation-diffusivity was concluded.

KW - Cation Dynamics

KW - Electrical Conductivity

KW - Intercalation

KW - NMR

KW - Saponite

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