A potential tool for analyzing aluminosilicate materials: Fourier transform ion cyclotron resonance mass spectrometry

Castello, J.; Gaumet, Jean‐Jacques; Müller, Jean-François; Friour, G.; Guilment, Jean; Poncelet, Olivier

doi:10.1016/j.progsolidstchem.2005.11.043

Cited by 6 publications

(1 citation statement)

References 11 publications

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“…These results were obtained during a study of aluminosilicates doped with Eu cations [20]. Our hypothesis is based on the fact that, as was shown [21,22], natural aluminosilicates can contain impurities of rare-earth elements, in particular, Eu 3+ ions. However, the elemental analysis method used in the present work did not allow chemical elements with atomic numbers greater than 40 to be identified.…”

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Photoluminescence of montmorillonite clay minerals modified by cetyltrimethylammonium bromide

et al. 2011

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The structure and photoluminescent properties of natural montmorillonite (MMT) aluminosilicates from three mineral deposits that were modified by cations of sodium or the surfactant cetyltrimethylammonium bromide (CTAB) have been investigated. X-ray fluorescence analysis showed significant differences in the concentrations of the inorganic dopants in these materials. An x-ray diffraction analysis established that incorporation of the CTA + long-chain cations into the MMTs expands remarkably the mineral interplanar distances, the values of which are close to each other for all organoclay samples under study and equal to 1.8-2.0 nm. The photoluminescent properties of the Na-form of the MMTs are shown to depend on the amount of introduced dopant capable of either enhancing or quenching the emission. Deposition of CTAB on the mineral surface influences the luminescence pattern, the spectral contour and wavelength range being practically the same for all modified samples. The emission may intensify or weaken because of such surface modification.Introduction. Natural layered clay minerals (CM) with the 2:1 structure type are highly disperse and have a large specific surface area. They are known to be selective sorbents and effective ion-exchangers [1, 2], active catalysts for various processes (isomerization, polymerization, addition, etc.[3]), fillers of organic media, plastifiers of polymeric materials [4-8], etc. The particles of these CM are stratified in a liquid medium. Their thickness is of the order of nanometers; the width/length, 25-1000 nm. Their surface is organophobic in the unaltered state. Owing to the presence in the CM interplanar space of metal cations that are susceptible to ion exchange, it is rather easy to convert the surface into an organophilic one via exchange of the inorganic cations by organic ones using ion exchange. As a result, the affinity of the resulting organoclays for an organic medium [polymers, liquid crystals (LC), aromatic compounds, etc.] increases sharply. Heterocomposites with a homogeneous structure (coagulation network) consisting of nanoparticles of the organoclay and the organic matrix are formed at a certain concentration of them. For example, LC filled with CM particles modified by various surfactants (SA) exhibit a variety of electro-optical properties [9][10][11].The starting CM in the present work was montmorillonite (MMT) from three deposits: Pyzhev (Ukraine), Cherkassy (Ukraine), and Askan (Georgia). MMT is a layered natural aluminosilicate of the 2:1 structure type that consists of two layers of SiO 2 tetrahedra between which a layer of Al 2 O 3 octahedra is located. These samples differ in the impurity profile, dispersion, cation-exchange capacity (CEC), and magnitude of surface charge. This should affect their properties (in particular, optical ones). We studied two series of these CM. One of them was the Na-form of the samples; the other, MMT modified with an organic molecule. The organic surface modifier was cetyltrimethylammonium bromide (CTAB) because this SA...

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Photoluminescence of montmorillonite clay minerals modified by cetyltrimethylammonium bromide

et al. 2011

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Laser Ionization Mass Spectrometry of Inorganic Ions

Pavlov

Attygalle

2012

Mass Spectrometry Handbook

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Laser-induced Fourier transform ion cyclotron resonance mass spectrometry of organic and inorganic compounds: methodologies and applications

Aubriet¹

2007

Anal Bioanal Chem

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The combination of a laser with a Fourier transform ion cyclotron resonance mass spectrometer (FTICRMS) enables a variety of MS experiments to be conducted. The laser can be used either as an intense photonic source for the photoionization of neutral species introduced in a variety of ways into the FTICR cell, or it can be made to directly interact with a solid, generating gas-phase ions. Depending on the experimental conditions used, various laser-matter interactions can occur. When high laser energy (also referred to as power density or irradiance) is used, laser ablation (LA) processes lead to the release of species into the gas phase, a significant fraction of which are ionic. The number of ions decreases with the irradiance. For low irradiance values, the so-called laser desorption (LD) regime applies, where the expelled species are mainly neutrals. LA-FTICRMS and LD-FTICRMS can be used to study a wide range of materials, including mineral, organic, hybrid and biological compounds (although matrix-assisted laser desorption ionization, MALDI, which is not reviewed in this paper, is more commonly applied to biological compounds). This paper will review a selection of methodological developments and applications in the field of laser ionization FTICRMS, LD-FTICRMS, and LA-FTICRMS for the analysis of organics and inorganics in complex mixtures, emphasizing insoluble materials. Specifically, silicate- and carbon-based complex materials as well as organic compounds will be examined due to their relevance to natural environmental and anthropogenic matrices.

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A potential tool for analyzing aluminosilicate materials: Fourier transform ion cyclotron resonance mass spectrometry

Cited by 6 publications

References 11 publications

Photoluminescence of montmorillonite clay minerals modified by cetyltrimethylammonium bromide

Photoluminescence of montmorillonite clay minerals modified by cetyltrimethylammonium bromide

Laser Ionization Mass Spectrometry of Inorganic Ions

Laser-induced Fourier transform ion cyclotron resonance mass spectrometry of organic and inorganic compounds: methodologies and applications

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