Neutron scattering study on dynamics of water molecules confined in MCM-41

Shuichi Takahara; Shigeharu Kittaka; Toshinori Mori; Yasushige Kuroda; Toshio Yamaguchi; Marie Claire Bellissent-Funel

doi:10.1007/s10450-005-5971-y

Neutron scattering study on dynamics of water molecules confined in MCM-41

Shuichi Takahara, Shigeharu Kittaka, Toshinori Mori, Yasushige Kuroda, Toshio Yamaguchi, Marie Claire Bellissent-Funel

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

16 Citations (Scopus)

Abstract

Quasi-elastic neutron scattering (QENS) spectra of water-filled MCM-41 samples having different pore sizes (pore diameters: 2.14 and 2.84 nm) were measured over the temperature range 200-298 K and analyzed by a model in which contributions of translational and rotational diffusions of water molecules are expressed by a linear combination of Lorentzian functions (Teixeira et al., 1985). The results indicated that the translational diffusion is decelerated by confinement and that the deceleration increases with a decrease in pore size. QENS spectra of water-filled MCM-41 samples having the same pore sizes (pore diameter: 3.36 nm) but a different amount of the hydroxyl groups (0.7 and 2.6 OH's/nm²) were also measured over the temperature range 220-298 K. It was found that the vibrational amplitude of water molecules in MCM-41 increases with increasing amount of the surface hydroxyls, which implies that the hydrogen-bond network of confined water is distorted by interaction with the surface hydroxyls.

Original language	English
Pages (from-to)	479-483
Number of pages	5
Journal	Adsorption
Volume	11
Issue number	1 SUPPL.
DOIs	https://doi.org/10.1007/s10450-005-5971-y
Publication status	Published - Jul 2005

Keywords

Confined water
Diffusion coefficient
MCM-41
Quasi-elastic neutron scattering
Surface hydroxyls

ASJC Scopus subject areas

Chemistry(all)
Chemical Engineering(all)
Surfaces and Interfaces

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title = "Neutron scattering study on dynamics of water molecules confined in MCM-41",

abstract = "Quasi-elastic neutron scattering (QENS) spectra of water-filled MCM-41 samples having different pore sizes (pore diameters: 2.14 and 2.84 nm) were measured over the temperature range 200-298 K and analyzed by a model in which contributions of translational and rotational diffusions of water molecules are expressed by a linear combination of Lorentzian functions (Teixeira et al., 1985). The results indicated that the translational diffusion is decelerated by confinement and that the deceleration increases with a decrease in pore size. QENS spectra of water-filled MCM-41 samples having the same pore sizes (pore diameter: 3.36 nm) but a different amount of the hydroxyl groups (0.7 and 2.6 OH's/nm2) were also measured over the temperature range 220-298 K. It was found that the vibrational amplitude of water molecules in MCM-41 increases with increasing amount of the surface hydroxyls, which implies that the hydrogen-bond network of confined water is distorted by interaction with the surface hydroxyls.",

keywords = "Confined water, Diffusion coefficient, MCM-41, Quasi-elastic neutron scattering, Surface hydroxyls",

author = "Shuichi Takahara and Shigeharu Kittaka and Toshinori Mori and Yasushige Kuroda and Toshio Yamaguchi and Bellissent-Funel, {Marie Claire}",

note = "Funding Information: This work was partly supported by Grant in Aid for Science Research No. 08454227 from the Ministry of Education, Culture, Sports, Science and Technology of Japan and by a Special Grant for Cooperative Research administered by Japan Private School Promotion Foundation.",

year = "2005",

month = jul,

doi = "10.1007/s10450-005-5971-y",

language = "English",

volume = "11",

pages = "479--483",

journal = "Adsorption",

issn = "0929-5607",

publisher = "Springer Netherlands",

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TY - JOUR

T1 - Neutron scattering study on dynamics of water molecules confined in MCM-41

AU - Takahara, Shuichi

AU - Kittaka, Shigeharu

AU - Mori, Toshinori

AU - Kuroda, Yasushige

AU - Yamaguchi, Toshio

AU - Bellissent-Funel, Marie Claire

N1 - Funding Information: This work was partly supported by Grant in Aid for Science Research No. 08454227 from the Ministry of Education, Culture, Sports, Science and Technology of Japan and by a Special Grant for Cooperative Research administered by Japan Private School Promotion Foundation.

PY - 2005/7

Y1 - 2005/7

N2 - Quasi-elastic neutron scattering (QENS) spectra of water-filled MCM-41 samples having different pore sizes (pore diameters: 2.14 and 2.84 nm) were measured over the temperature range 200-298 K and analyzed by a model in which contributions of translational and rotational diffusions of water molecules are expressed by a linear combination of Lorentzian functions (Teixeira et al., 1985). The results indicated that the translational diffusion is decelerated by confinement and that the deceleration increases with a decrease in pore size. QENS spectra of water-filled MCM-41 samples having the same pore sizes (pore diameter: 3.36 nm) but a different amount of the hydroxyl groups (0.7 and 2.6 OH's/nm2) were also measured over the temperature range 220-298 K. It was found that the vibrational amplitude of water molecules in MCM-41 increases with increasing amount of the surface hydroxyls, which implies that the hydrogen-bond network of confined water is distorted by interaction with the surface hydroxyls.

AB - Quasi-elastic neutron scattering (QENS) spectra of water-filled MCM-41 samples having different pore sizes (pore diameters: 2.14 and 2.84 nm) were measured over the temperature range 200-298 K and analyzed by a model in which contributions of translational and rotational diffusions of water molecules are expressed by a linear combination of Lorentzian functions (Teixeira et al., 1985). The results indicated that the translational diffusion is decelerated by confinement and that the deceleration increases with a decrease in pore size. QENS spectra of water-filled MCM-41 samples having the same pore sizes (pore diameter: 3.36 nm) but a different amount of the hydroxyl groups (0.7 and 2.6 OH's/nm2) were also measured over the temperature range 220-298 K. It was found that the vibrational amplitude of water molecules in MCM-41 increases with increasing amount of the surface hydroxyls, which implies that the hydrogen-bond network of confined water is distorted by interaction with the surface hydroxyls.

KW - Confined water

KW - Diffusion coefficient

KW - MCM-41

KW - Quasi-elastic neutron scattering

KW - Surface hydroxyls

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Neutron scattering study on dynamics of water molecules confined in MCM-41

Abstract

Keywords

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