Efficiency of dipolar and J-derived solid-state NMR techniques for a new pair of nuclei {31P,29Si}. Towards the characterization of Si–O–P mesoporous materials

Coelho, Carlos; Azaı̈s, Thierry; Bonhomme, Christian; Bonhomme-Coury, Laure; Boissière, Cédric; Laurent, Guillaume; Massiot, Dominique

doi:10.1016/j.crci.2007.09.012

Cited by 23 publications

(34 citation statements)

References 52 publications

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“…The full J-resolved spectra can be perfectly modeled by considering 29 Si isotopic enrichment and strong coupling effects due to small chemical shift differences (adapted from reference [22]). compounds or glasses, and also heteronuclear couplings such as one-bond 19 F-207 Pb [43], 31 P-113 Cd, and 31 P-77 Se [44-46] 1 J couplings, and two-bond 2 J( 29 Si-O-31 P) couplings [47][48][49], among others.…”

Section: J Couplings Between I = 1/2 Nuclear Spinsmentioning

confidence: 99%

Detection and use of small J couplings in solid state NMR experiments

Massiot

Fayon

Deschamps

et al. 2009

Comptes Rendus. Chimie

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Over the years, solid-state nuclear magnetic resonance (NMR) spectroscopy has become an important tool for materials science, with its local point of view that is highly complementary to the structural information provided by diffraction techniques, electron microscopy, and molecular modeling, for example. As compared to other interactions that determine the spectral expression of the local structure of the observed nuclei in solid-state NMR experiments, the J coupling, characteristic of the chemical bonds, has received far less attention because of its being generally so small that it is masked in the line-widths. Nevertheless, the scalar or isotropic part of J couplings, which is not averaged by magic angle spinning (MAS), can be evidenced in many systems, and exploited to unequivocally characterize the extended coordination sphere. In a first step we describe the different experiments that permit the observation and the measurement of J couplings, even when dealing with quadrupolar nuclei. We then present new and recently-published results that illustrate the state of the art of NMR methodologies based on or intended for measuring J couplings in solids and the novel perspectives that they open towards better understanding of ordered and disordered materials at the subnanometric scale, a length scale that is otherwise difficult to access.

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Section: J Couplings Between I = 1/2 Nuclear Spinsmentioning

confidence: 99%

Detection and use of small J couplings in solid state NMR experiments

Massiot

Fayon

Deschamps

et al. 2009

Comptes Rendus. Chimie

Self Cite

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“…By spray-drying, the localization of heteroelements, introduced in the pristine solution as molecular or salt precursors, is very sensitive to both the chemistry of precursors in solution and his reactivity and interactions with structuring agent and silica oligomers. In literature, the following heteroelements have always been incorporated into acidic conditions, which is needed for the structuration of powders by EISA: aluminium, [ 46 , 136-141 ] zirconium, [ 48 , 139 , 142 ] calcium, [ 47 ] iron, [ 143 ] phosphate ions, [ 144 ] palladium, [ 145 ] etc. As heteroelement concentration increases in the solution, the trapping capacity of the structuring agent and silica oligomers play a crucial role in the fi nal localization of metallic centres.…”

Section: One Pot Incorporation Of Mixed Metaloxides-silica Matricesmentioning

confidence: 99%

Aerosol Route to Functional Nanostructured Inorganic and Hybrid Porous Materials

Boissière¹,

Grosso²,

Chaumonnot³

et al. 2010

Advanced Materials

339

295

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The major advances in the field of the designed construction of hierarchically structured porous inorganic or hybrid materials wherein multiscale texturation is obtained via the combination of aerosol or spray processing with sol-gel chemistry, self-assembly and multiple templating are the topic of this review. The available materials span a very large set of structures and chemical compositions (silicates, aluminates, transition metal oxides, nanocomposites including metallic or chalcogenides nanoparticles, hybrid organic-inorganic, biohybrids). The resulting materials are manifested as powders or smart coatings via aerosol-directed writing combine the intrinsic physical and chemical properties of the inorganic or hybrid matrices with defined multiscale porous networks having a tunable pore size and connectivity, high surface area and accessibility. Indeed the combination of soft chemical routes and spray processing provides "a wind of change" in the field of "advanced materials". These strategies give birth to a promising family of innovative materials with many actual and future potential applications in various domains such as catalysis, sensing, photonic and microelectronic devices, nano-ionics and energy, functional coatings, biomaterials, multifunctional therapeutic carriers, and microfluidics, among others.

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“…The following heteroelements are usually impregnated in silicate matrices: aluminum [194,195], 4.4 Hybrid Nanocomposites Based on Heteroelemental Oxide/Oxide Ceramicszirconium [196,197], calcium [33,88,198], iron [199], palladium [200], phosphate-ions [201], etc. However, most popular is already mentioned ceramic mixture of Si-Ti, Ti-Zr oxides [202][203][204][205][206][207][208][209][210][211][212][213].…”

Section: Hybrid Nanocomposites Based On Heteroelementalmentioning

confidence: 99%

Physics and Chemistry of Sol-Gel Nanocomposites Formation

Pomogailo

Джардималиева

2014

Nanostructured Materials Preparation via Condensation Ways

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This method called sol-gel or dip-and spin-on-glass process, spin-spray-coating, sol -gel glasses, which was widely used in the second half of the twentieth century [1] 1 is one of the most universal condensation ways of production of nanoparticles stabilized by inorganic oxide or polymeric matrices. A special interest is attracted to materials obtained by combination of sol-gel chemistry and aerosol or spray processes, and combination of sol-gel synthesis with intercalation. This also includes combinations of sol-gel processes with different types of thermolysis, and approaches met in nature in biomineralization processes, etc., which are new aspects of integrative chemistry approach. Traditional sol-gel concept is based on hydrolysis and condensation of metal alkoxides and many metalloids including different ways of their modification [2,3]. Main reactions proceed at relatively low temperatures with usage of prepared in advance or synthesized in parallel polymers, and are convenient techniques for preparation of organic-inorganic nanocomposites compared with commercial silicate-intercalation technique. Sizes of formed nanoparticles in a composite can be reduced to 10 nm by choice of relative conditions. Polymer-inorganic materials have high mechanical strength and thermal stability in combination with optimal heat transport properties. They are widely used in practice due to unique physical and chemical properties: incorporation of nanometric inorganic component into polymeric matrix improves mechanical properties of material [4][5][6][7], permeability of polymers [8]. Light-sensitive materials are used in optic and electronic industry, printed-circuit boards, photoconductive cells, as key elements in solid coatings, packing materials, as cover materials they have good transparency [9][10][11]. For example, sol-gel method was used to produce various polymer/TiO 2 composites with high refractive index [12]. Such type of composites are used for chromatographic carriers, membrane materials, these are the main class of plastics for different applications, including airspace. Controlled properties of the surface of these colloid 1 We refer here to the recent review devoted to celebration of 40th anniversary of innovation researches in polymer-inorganic ceramics produced by sol-gel technique [1].

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Efficiency of dipolar and J-derived solid-state NMR techniques for a new pair of nuclei {31P,29Si}. Towards the characterization of Si–O–P mesoporous materials

Cited by 23 publications

References 52 publications

Detection and use of small J couplings in solid state NMR experiments

Detection and use of small J couplings in solid state NMR experiments

Aerosol Route to Functional Nanostructured Inorganic and Hybrid Porous Materials

Physics and Chemistry of Sol-Gel Nanocomposites Formation

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