NMR Studies on the Dynamics of Intercalated Water in Li-saponite

Ishimaru, Shin’ichi; Ikeda, Ryuichi

doi:10.1515/zna-1997-1205

Cited by 4 publications

(3 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The mobility of Brønsted sites in acidic zeolites has been well characterized by 1 H MAS NMR, 7,8 2 H wide-line solidstate NMR, 9,10 and impedance spectroscopy, 11 whereas information about the dynamics of both protons and water in HPAs still remains scarce. Qualitative results about the rate of proton migration 8,[12][13][14][15] and dynamics of water in H 3 PW 12 O 40 ‚nH 2 O 16 at temperatures below 373 K were reported, whereas quantitative information was reported only for water internal rotation in hexahydrate of HPA at 302-328 K 17 and for proton migration in anhydrous HPA at temperatures as high as 373 K. 18 Deuterium solid-state NMR ( 2 H NMR) spectroscopy has been shown many times to be a powerful technique to characterize the Brønsted acid sites and to probe the dynamics of protons and water in zeolites, 9,10,[19][20][21] intercalated in clay minerals, 22 in crystalline hydrates, 23,24 in cement systems, 25 on the surface of MCM-41, 26 in VPI-5 molecular sieve, 27 and in HPAs. 16,28 2 H NMR is one of the experimental techniques providing information on the characteristics of the motional behavior of water molecules in solids.…”

Section: Introductionmentioning

confidence: 99%

“…Deuterium solid-state NMR ( 2 H NMR) spectroscopy has been shown many times to be a powerful technique to characterize the Brønsted acid sites and to probe the dynamics of protons and water in zeolites, ,,− intercalated in clay minerals, in crystalline hydrates, , in cement systems, on the surface of MCM-41, in VPI-5 molecular sieve, and in HPAs. , 2 H NMR is one of the experimental techniques providing information on the characteristics of the motional behavior of water molecules in solids. The line shape for 2 H NMR, being completely defined by intramolecular quadrupole interaction, − is especially sensitive to the mode of molecular motion and to its rate; , spin−lattice relaxation time is also dependent on the rate and mode of motion.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Deuterium Solid-State NMR Study of the Dynamic Behavior of Deuterons and Water Molecules in Solid D₃PW₁₂O₄₀

et al. 2003

View full text Add to dashboard Cite

The mobility of water molecules and deuterons of the deuterated analogue of solid 12-tungstophosphoric acid, H3PW12O40·nH2O (HPA) (n = 5.5 and 0.1), has been characterized by deuterium solid-state NMR. Analysis of the 2H NMR line shape and spin−lattice relaxation times allowed us to characterize the deuteron and water dynamics in HPA, at different water contents, in the temperature range 103−383 K. At 163−193 K and for n = 5.5, an intramolecular motion corresponding to reorientations by 180° flips around the C 2 axis of water in the [D5O2]+ ion has been detected, the deuteron being probably immobile. At temperatures above 313 K, both water and deuteron become involved in fast rotation around the C 3 axis of the formed [D3O]+ ion. The rotation is performed on a time scale of 30−50 ns with an activation energy E a of 8.5 kJ/mol. For n = 0.1, three dynamically different species can be distinguished: mobile deuterons, mobile [D3O]+ ions, and immobile deuterons. Mobile deuterons are weakly bonded to polyanions and move fast with a characteristic time of a few picoseconds and E a = 8.6 kJ/mol. [D3O]+ ions move more slowly than deuterons, but still fast, with a time scale of a few nanoseconds, and E a = 17.6 kJ/mol. The characteristic time for immobile deuterons is much greater than a few microseconds.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Deuterium Solid-State NMR Study of the Dynamic Behavior of Deuterons and Water Molecules in Solid D₃PW₁₂O₄₀

et al. 2003

View full text Add to dashboard Cite

show abstract

“…Ion-exchange reactions may replace the intercalated Na + and Ca 2+ ions with H + , Li + , Mg 2+ , organic cations, etc., in MMT. [141,146] For instance, a multistep ion-exchange reaction involving proton intercalation followed by Li + -ions for Li-MMT preparation is described in Figure 21a-c. [144,147] An advantage of MMTs is the weak interaction between the intercalated species and the layers due to the low ion substitution and appropriate interlayer charge (≈0.55 m.equiv./100 g).…”

Section: Besides Intercalation Into Interlayer Clay Galleries Can Imp...mentioning

confidence: 99%

2D Layered Nanomaterials as Fillers in Polymer Composite Electrolytes for Lithium Batteries

Vijayakumar

Ghosh

Asokan

et al. 2023

Advanced Energy Materials

View full text Add to dashboard Cite

there have been tremendous efforts to improve their performance, safety, costeffectiveness, and sustainability. [1] In the last four decades, dedicated research in material science toward developing electrodes, separators, electrolytes, current collectors, packaging materials, etc., have significantly contributed to the advancement of LIB technology. [2] Indeed, the progress in cell engineering and processing conditions has aided the evolution of high energy density LIBs (energy density >250 Wh kg −1 ), leading to their widespread application spanning from electronic devices to electric vehicles and stationary/ grid energy storage. [1] Considering the contributions that led to the invention of LIB technology, John B. Goodenough, Stanley Whittingham, and Akira Yoshino received the Chemistry Nobel Prize in 2019. [3] Despite their huge success, research and development on LIBs and allied battery technologies are still a hot topic in both academia and industry offering opportunities for breakthrough innovations and discoveries. Figure 1a presents a schematic illustration of the state-of-theart LIB and its main components. Liquid electrolytes based on organic solvents and lithium salts are the primary choice as electrolytes in LIBs due to their high ionic conductivity and good Polymer composite electrolytes (PCEs), i.e., materials combining the disciplines of polymer chemistry, inorganic chemistry, and electrochemistry, have received tremendous attention within academia and industry for lithiumbased battery applications. While PCEs often comprise 3D micro-or nanoparticles, this review thoroughly summarizes the prospects of 2D layered inorganic, organic, and hybrid nanomaterials as active (ion conductive) or passive (nonion conductive) fillers in PCEs. The synthetic inorganic nanofillers covered here include graphene oxide, boron nitride, transition metal chalcogenides, phosphorene, and MXenes. Furthermore, the use of naturally occurring 2D layered clay minerals, such as layered double hydroxides and silicates, in PCEs is also thoroughly detailed considering their impact on battery cell performance. Despite the dominance of 2D layered inorganic materials, their organic and hybrid counterparts, such as 2D covalent organic frameworks and 2D metal-organic frameworks are also identified as tuneable nanofillers for use in PCE. Hence, this review gives an overview of the plethora of options available for the selective development of both the 2D layered nanofillers and resulting PCEs, which can revolutionize the field of polymer-based solid-state electrolytes and their implementation in lithium and post-lithium batteries.

show abstract

Nuclear Magnetic Resonance of Geological Materials and Glasses

Moran

Howe

2000

Encyclopedia of Analytical Chemistry

View full text Add to dashboard Cite

This article concerns the application of nuclear magnetic resonance (NMR) spectroscopic techniques to the analysis of geological materials and glasses. It includes inorganic minerals and glasses, but does not cover soils and clay minerals to any extent. The first part presents an overview of solid‐state NMR experiments applicable to inorganic solids. The range of nuclei accessible by NMR and the particular requirements for obtaining good spectra of more difficult nuclei, including quadrupolar nuclei, are discussed. The experimental conditions under which solid‐state NMR can provide quantitative analytical measurements are also considered. NMR spectroscopy provides element‐specific speciation and structural information including coordination environment and bond distances. It is particularly valuable for the analysis of amorphous and partially crystalline materials not amenable to structure determination by X‐ray diffraction. NMR can detect and quantify materials containing multiple phases and can be used for in situ monitoring of phase transitions. It provides qualitative and quantitative speciation information for framework nuclei in glasses and is also capable of characterizing the dynamic behavior of mobile ions and solvent through relaxation, diffusion and chemical exchange experiments. Thus it has become an important technique for the study of hydrous minerals and gels and for ion‐conducting glasses. The sensitivity of NMR varies considerably, depending on the nucleus observed, its abundance and its chemical environment. NMR sensitivities and detection limits cannot compete with elemental analytical techniques such as X‐ray fluorescence. In addition, quantitation in solids requires careful control of experimental parameters and careful calibration to avoid artifacts. However, the selectivity of NMR as an analytical technique is unsurpassed and the development of specialist pulse sequences to measure specific local interactions in solids makes it particularly well suited to the analysis of geological materials and glasses. NMR imaging enables structural information to be resolved in three dimensions, although resolution in solid‐state imaging is limited to tens of micrometers at best owing to the broader line widths and lower signal‐to‐noise ratios compared with liquids. However, capabilities in this field are being extended all the time and the application of NMR imaging techniques in materials analysis is expanding steadily. An alternative to conventional imaging is NMR force microscopy, which shows potential for surface mapping at higher resolutions. The applications section is organized on the basis of the materials being analyzed. Within each section, NMR techniques are classified according to the observed nuclei. The emphasis is on more recent applications and on developments leading to enhanced resolution and sensitivity. Silicates and aluminosilicates represent the largest class of applications, followed by phosphate, borate and other oxide glasses. Sol–gel materials and the reactions leading to gel formation are also discussed, as are hydrous materials more generally. The other important areas of application reviewed are minerals, ceramics, high‐temperature melts and ion‐conducting glasses. Finally, the applications of NMR imaging in this field, although sparse at present, are potentially very great. This is illustrated by two major areas of application to date, namely the imaging of bone minerals and cement and concrete.

show abstract

NMR Studies on the Dynamics of Intercalated Water in Li-saponite

Cited by 4 publications

References 7 publications

Deuterium Solid-State NMR Study of the Dynamic Behavior of Deuterons and Water Molecules in Solid D₃PW₁₂O₄₀

Deuterium Solid-State NMR Study of the Dynamic Behavior of Deuterons and Water Molecules in Solid D₃PW₁₂O₄₀

2D Layered Nanomaterials as Fillers in Polymer Composite Electrolytes for Lithium Batteries

Nuclear Magnetic Resonance of Geological Materials and Glasses

Contact Info

Product

Resources

About

NMR Studies on the Dynamics of Intercalated Water in Li-saponite

Cited by 4 publications

References 7 publications

Deuterium Solid-State NMR Study of the Dynamic Behavior of Deuterons and Water Molecules in Solid D3PW12O40

Deuterium Solid-State NMR Study of the Dynamic Behavior of Deuterons and Water Molecules in Solid D3PW12O40

2D Layered Nanomaterials as Fillers in Polymer Composite Electrolytes for Lithium Batteries

Nuclear Magnetic Resonance of Geological Materials and Glasses

Contact Info

Product

Resources

About

Deuterium Solid-State NMR Study of the Dynamic Behavior of Deuterons and Water Molecules in Solid D₃PW₁₂O₄₀

Deuterium Solid-State NMR Study of the Dynamic Behavior of Deuterons and Water Molecules in Solid D₃PW₁₂O₄₀