A controlled spatial distribution of functional units in the two dimensional nanospace of layered silicates and titanates

Ogawa, Makoto; Saito, Kanji; Sohmiya, Minoru

doi:10.1039/c4dt00147h

Cited by 97 publications

(65 citation statements)

References 159 publications

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“…The arrangement of molecules in the interlayer is determined by the layer charge density of the used clay. A low layer charge density as in MMT leads to a formation of mono‐ and bilayers in the clay . The d values suggest such a monolayer in the clay.…”

Section: Resultsmentioning

confidence: 95%

Intercalation of Nickel(II) and Iron(II) Metallosupramolecular Polyelectrolytes in Montmorillonite: Nanocomposites and their Electrorheological Properties

2015

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Nanocomposites obtained from the montmorillonite clay (Na0.36(Al1.64Mg0.36)Si4O10(OH)2⋅n H2O) and metallosupramolecular polyelectrolytes (MEPE) with iron(II) and nickel(II) are prepared by an aqueous intercalation reaction. Intercalation of MEPE in the interlayer structure of montmorillonite (MMT) is confirmed by different analytical techniques including powder X‐ray diffraction, FTIR spectroscopy, and thermal analysis. We note a difference in the intercalation behavior between NiII and FeII. The intercalation of Fe‐MEPE is hindered by traces of Fe2O3 in MMT. Removal of the impurities with sodium dithionite and citrate buffer makes Fe‐MEPE‐MMT available. Electrorheological measurements reveal for both nanocomposites a distinctive ER effect. The effect depends on the intercalated coordination polymer. Dielectric spectroscopy shows a different polarization for Fe‐MEPE‐MMT and Ni‐MEPE‐MMT.

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Section: Resultsmentioning

confidence: 95%

Intercalation of Nickel(II) and Iron(II) Metallosupramolecular Polyelectrolytes in Montmorillonite: Nanocomposites and their Electrorheological Properties

2015

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“…The extension of this factor is related to size of organic molecules, but also to spatial distribution of them [44,45]. Calcination of intercalated layered precursors in most cases leads to IPC-4 zeolite (PCR).…”

Section: Resultsmentioning

confidence: 99%

Germanosilicate UTL and its rich chemistry of solid-state transformations towards IPC-2 (OKO) zeolite

et al. 2015

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“…The covalent attachment of functional units by silylation to the silicates and the titanates, as descried above, has been a useful method for the spatially controlled distribution [139]. However, in organic cations-smectite systems, segregation phenomena are often observed, as schematically shown in Fig.…”

Section: Guest-guest Interactionsmentioning

confidence: 98%

Inorganic–Organic Interactions

Okada

Ogawa

2017

Nanostructure Science and Technology

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Intercalation of guest species into layered materials is a way of constructing two-dimensionally ordered inorganic-organic molecular or supramolecular or hybrid assembly with unique microstructures controlled by host-guest and guestguest interactions [1][2][3][4][5][6][7][8][9]. One of the most unique characteristics of intercalation chemistry is the expansion of the interlayer space upon intercalation of guest species. The expanded interlayer space by the intercalation can be used to immobilize guest species further, since the space was geometrically and chemically modified to accommodate wider variety of guest species. This 'expandable' 2-dimensional nano-space is useful as a nano-vessel or nano-reaction environment for immobilizing various kinds of molecular functional species.The properties of intercalation compounds are largely affected by the population (or density or distance between adjacent species) of functional units and some useful functions are emerged only when appropriate population (nanostructure) is achieved. The interactions between host and guest have been investigated based on the structural consideration of resulting intercalation compounds (or interlayer microstructures). The characterization includes X-ray and electron diffraction and composition, chemical bonding between host and guest using vibrational spectroscopy, electronic states of the confined guests by electronic spectroscopy, strength of interactions using thermal analyses (desorption and decomposition), and more directly using advanced microscopies.

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A controlled spatial distribution of functional units in the two dimensional nanospace of layered silicates and titanates

Cited by 97 publications

References 159 publications

Intercalation of Nickel(II) and Iron(II) Metallosupramolecular Polyelectrolytes in Montmorillonite: Nanocomposites and their Electrorheological Properties

Intercalation of Nickel(II) and Iron(II) Metallosupramolecular Polyelectrolytes in Montmorillonite: Nanocomposites and their Electrorheological Properties

Germanosilicate UTL and its rich chemistry of solid-state transformations towards IPC-2 (OKO) zeolite

Inorganic–Organic Interactions

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