H3ONb3O8 and HNb3O8 : New protonic oxides with a layer structure involving ion exchange properties

Nedjar, R.; Borel, M.M.; Raveau, B.

doi:10.1016/0025-5408(85)90123-0

Cited by 78 publications

(53 citation statements)

References 5 publications

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“…The complete disappearance of Nb 2 O 5 diffraction patterns, as well as the appearance of the characteristic 020 diffraction peak at 2Â = 8.3 • , indicates the formation of layered KNb 3 O 8 . After protonation, the 020 diffraction peak was slightly shifted to the smaller angle end (2Â = 7.9 • for HNb 3 O 8 ) compared with that of the potassium salts, which accounts for the intercalation of water molecules at the interlayer space through hydrogen bonding [43]. In the case of HNb 3 O 8 -NS, the intensity of the 020 diffraction peak was greatly reduced and relatively weak diffraction patterns were observed, which suggests the partial destruction of the periodic layered structure of the original KNb 3 O 8 .…”

Section: Supportmentioning

confidence: 97%

Exfoliated Pd/HNb3O8 nanosheet as highly efficient bifunctional catalyst for one-pot cascade reaction

Lee

Chung

2016

Applied Surface Science

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Section: Supportmentioning

confidence: 97%

Exfoliated Pd/HNb3O8 nanosheet as highly efficient bifunctional catalyst for one-pot cascade reaction

Lee

Chung

2016

Applied Surface Science

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“…The layered protonated transition-metal oxides (HNb 3 O 8 , HTiNbO 5 , HLaNb 2 O 7 , H 2 Ti 4 O 9 and H 2 Ti 2.8 Mn 0.2 O 7 ) were prepared according to literatures [5,[19][20][21][22]. The intercalating agent was an isopropyl alcohol solution of TEAIP (V TEAIP /V isopropyl alcohol = 80:20), which was supplied by Aldrich Chemical Company Inc. Before the intercalation experiment, the intercalating agent was further diluted with isopropyl alcohol, forming a solution of V TEAIP /V isopropyl alcohol = 40:60.…”

Section: Preparationmentioning

confidence: 99%

Intercalation behaviors of chiral titanium(IV) (triethanolaminato)-isopropoxide (Ti(C2H4O)3N(OCH(CH3)2) in protonated lamellar metal oxides and characterization of the intercalated resultants

Guo

Hou

Fan

et al. 2011

J Incl Phenom Macrocycl Chem

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The intercalation behaviors of chiral titanium(IV) (triethanolaminato)-isopropoxide (the chemical formula is Ti(C 2 H 4 O) 3 N(OCH(CH 3 ) 2 ), abbreviated as TEAIP) in a series of layered protonated metal oxides (HNb 3 O 8 , HTiNbO 5 , HLaNb 2 O 7 , H 2 Ti 4 O 9 and H 2 Ti 2.8 Mn 0.2 O 7 ) were investigated. TEAIP could be intercalated into the interlayer spaces of layered HNb 3 O 8 as well as HTiNbO 5 , and as a result, two novel inorganic-organic hybrid nanocomposites, TEAIP-intercalated HNb 3 O 8 and TEAIP-intercalated HTiNbO 5 , were obtained,respectively. Based on the compositions of the intercalated compounds quantitatively estimated from TG-DTA data, the chemical formulas of the TEAIP-intercalated HNb 3 O 8 and TEAIPintercalated HTiNbO 5 were expressed as (TEAIP) 0.17 H 0.83 Nb 3 O 8 and (TEAIP) 0.14 H 0.86 TiNbO 5 , respectively. Neither H 2 Ti 4 O 9 nor H 2 Ti 2.8 Mn 0.2 O 7 formed any intercalated phase through the exchange reaction between the layered protonated metal oxides and TEAIP; HLaNb 2 O 7 could only accommodate a very limited amount of the guest molecules, giving rise to a TEAIP-partially intercalated layered product. The different intercalation behavior of TEAIP in the layered metal oxides was ascribed to the difference of these protonated metal oxides in acidity and the difference of the layered hosts in charge density. The competitively intercalation behavior between TEAIP and n-decylamine in the interlayer space of HNb 3 O 8 as well as HTiNbO 5 was also investigated. Both TEAIP and n-decylamine could be simultaneously intercalated into HNb 3 O 8 , leading to two different guest-intercalated phases, although n-decylamineintercalated phase was thermally unstable compared with the TEAIP-intercalated phase. In the case of HTiNbO 5 , only ndecylamine-intercalated phase was formed. The different basicity and steric hindrance of the two kinds of guest molecules and different acidity of the two layered hosts were mainly responsible for the above results.

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“…Most of them containing d 0 metal atoms adopt layered structures, facilitating acid-base intercalation and related interlayer chemistry. The new materials [21][22][23][24][25][26][27][28] …”

Section: Acidity/basicitymentioning

confidence: 99%

Quest for new materials: Inorganic chemistry plays a crucial role

Gopalakrishnan

Ramanathan

2009

J Chem Sci

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There is an endless quest for new materials to meet the demands of advancing technology. Thus, we need new magnetic and metallic/semiconducting materials for spintronics, new low-loss dielectrics for telecommunication, new multi-ferroic materials that combine both ferroelectricity and ferromagnetism for memory devices, new piezoelectrics that do not contain lead, new lithium containing solids for application as cathode/anode/electrolyte in lithium batteries, hydrogen storage materials for mobile/transport applications and catalyst materials that can convert, for example, methane to higher hydrocarbons, and the list is endless! Fortunately for us, chemistry -inorganic chemistry in particular -plays a crucial role in this quest. Most of the functional materials mentioned above are inorganic non-molecular solids, while much of the conventional inorganic chemistry deals with isolated molecules or molecular solids. Even so, the basic concepts that we learn in inorganic chemistry, for example, acidity/basicity, oxidation/reduction (potentials), crystal field theory, low spin-high spin/inner sphere-outer sphere complexes, role of d-electrons in transition metal chemistry, electron-transfer reactions, coordination geometries around metal atoms, Jahn-Teller distortion, metal-metal bonds, cation-anion (metal-nonmetal) redox competition in the stabilization of oxidation states -all find crucial application in the design and synthesis of inorganic solids possessing technologically important properties. An attempt has been made here to illustrate the role of inorganic chemistry in this endeavour, drawing examples from the literature as well as from the research work of my group.

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H3ONb3O8 and HNb3O8 : New protonic oxides with a layer structure involving ion exchange properties

Cited by 78 publications

References 5 publications

Exfoliated Pd/HNb3O8 nanosheet as highly efficient bifunctional catalyst for one-pot cascade reaction

Exfoliated Pd/HNb3O8 nanosheet as highly efficient bifunctional catalyst for one-pot cascade reaction

Intercalation behaviors of chiral titanium(IV) (triethanolaminato)-isopropoxide (Ti(C2H4O)3N(OCH(CH3)2) in protonated lamellar metal oxides and characterization of the intercalated resultants

Quest for new materials: Inorganic chemistry plays a crucial role

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