Dynamics of Guest Water Molecules in Pillared Mordenite Studied by 1H NMR Relaxation

被引：3

作者：

Shelyapina, Marina G. ^{[1
]}

Nefedov, Denis Yu. ^{[1
]}

Antonenko, Anastasiia O. ^{[1
]}

Hmok, H'Linh ^{[2
,3
]}

Egorov, Andrei V. ^{[1
]}

Egorova, Maria I. ^{[1
]}

Ievlev, Alexandr V. ^{[1
]}

Yocupicio-Gaxiola, Rosario ^{[4
]}

Petranovskii, Vitalii ^{[5
]}

Antunez-Garcia, Joel ^{[5
]}

Fuentes, Sergio ^{[5
]}

机构：

[1] St Petersburg State Univ, 7-9 Univ Skaya Nab, St Petersburg 199034, Russia

[2] Van Lang Univ, Sci & Technol Adv Inst, Simulat Mat Sci Res Grp, Ho Chi Minh City, Vietnam

[3] Van Lang Univ, Fac Appl Technol, Sch Technol, Ho Chi Minh City, Vietnam

[4] Tecnol Nacl Mexico, Inst Tecnol Super Guasave, Carretera Brecha Sin Numero, Guasave 81149, Sinaloa, Mexico

[5] Univ Nacl Autonoma Mexico, Ctr Nanociencias & Nanotecnol, Ensenada 22860, Mexico

来源：

APPLIED MAGNETIC RESONANCE | 2023年 / 54卷 / 10期

基金：

俄罗斯科学基金会;

关键词：

NUCLEAR-MAGNETIC-RESONANCE; SUPERCOOLED WATER; HYDROGEN MOBILITY; SELF-DIFFUSION; ZSM-5; ZEOLITES; NMR; MCM-41; SIMULATION; CATALYSTS; SYSTEMS;

D O I：

10.1007/s00723-023-01589-w

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

The dynamics of H2O molecules confined in mesopores of about 3.4 nm in size, formed by amorphous SiO2 pillars separating 2D mordenite nanolayers, was probed by H-1 nuclear magnetic relaxation. H-1 nuclear magnetic resonance (NMR) spectra evidence the presence of water with different local surroundings and mobility. The temperature dependence of H-1 spin-lattice relaxation T-1 and relaxation in rotating frame T-1 & rho; indicate the complex behavior of nanoconfined water that can be characterized by different activation energies: freezing (29 kJ/mol), fast rotation (12 kJ/mol), and translational motion (23.6 kJ/mol).

引用

页码：915 / 928

页数：14

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