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

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

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.

Original language	English
Pages (from-to)	903-908
Number of pages	6
Journal	Zeitschrift fur Naturforschung - Section A Journal of Physical Sciences
Volume	53
Issue number	10-11
DOIs	https://doi.org/10.1515/zna-1998-10-1116
Publication status	Published - 1998 Nov
Externally published	Yes

Keywords

Cation Dynamics
Electrical Conductivity
Intercalation
NMR
Saponite

ASJC Scopus subject areas

Mathematical Physics
Physics and Astronomy(all)
Physical and Theoretical Chemistry

Access to Document

10.1515/zna-1998-10-1116

Cite this

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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.",

year = "1998",

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doi = "10.1515/zna-1998-10-1116",

language = "English",

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T1 - Dynamics of Interlayer Cations in Tetramethylammonium-Saponite Studied by 1H, 2H NMR, and Electrical Conductivity Measurements

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.

PY - 1998/11

Y1 - 1998/11

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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