Metal Complexes of Organophosphate Esters and Open-Framework Metal Phosphates: Synthesis, Structure, Transformations, and Applications

Hydrogen storage in several microporous zeolites

Twenty years after the first development of solvothermal reactions, it appears important through the last research activities to trace the future trends taking into account their potentialities and the different economical constraints. During these last 20 years solvothermal reactions have been mainly used from preparing micro- or nanoparticles with different morphologies. Due to the importance to dispose of new materials for developing either basic research or industrial applications, such a presentation will be only focussed on the potentialities of solvothermal reactions in materials synthesis. Solvothermal reactions are mainly characterized by different chemical parameters (nature of the reagents and of the solvent) and thermodynamical parameters (in particular temperature, pressure). (a) The selection of the composition of the solvent opens new research areas for stabilizing materials belonging to different classes of materials (alloys, oxides, nitrides, sulphides…). (b) The mild temperature conditions generally used are able to improve chemical diffusion and reactivity in order to help the preparation of specific materials at the frontier between either different classes of inorganic materials (oxides-nitrides, nitrides-halides…) or inorganic/organic, inorganic/biologic frameworks. (c) The high pressure conditions, due to the small conveyed energy compared to temperature, allow also to stabilize metastable frontier materials (geo-inspired or bio-inspired materials). (d) In the future, taking into account, from one side: the economical and the environmental constraints, and from the other: the industrial demand of materials characterized by specific physical, chemical and biological properties, the potential developments of solvothermal processes will be analyzed.

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Solvothermal reactions: an original route for the synthesis of novel materials

Zeolite T membrane: preparation, characterization, pervaporation of water/organic liquid mixtures and acid stability

Tailoring the anisotropic growth rates of materials to achieve desired structural outcomes is a pervasive challenge in synthetic crystallization. Here we discuss a method to selectively control the growth of zeolite crystals, which are used extensively in a wide range of industrial applications. This facile method cooperatively tunes crystal properties, such as morphology and surface architecture, through the use of inexpensive, commercially available chemicals with specificity for binding to crystallographic surfaces and mediating anisotropic growth. We examined over 30 molecules as potential zeolite growth modifiers (ZGMs) of zeolite L (LTL type) crystallization. ZGM efficacy was quantified through a combination of macroscopic (bulk) and microscopic (surface) investigations that identified modifiers capable of dramatically altering the cylindrical morphology of LTL crystals. We demonstrate an ability to tailor properties critical to zeolite performance, such as external porous surface area, crystal shap...

A facile strategy to design zeolite L crystals with tunable morphology and surface architecture.

A new 3-D open framework aluminophosphate [Al2P3O12][C4N3H16] has been solvothermally synthesized from phenol medium using diethylenetriamine as a template. Its structure contains parallel 12- and 8-membered channels along the [001] direction.

Solvothermal Synthesis and Characterization of a New 3-D Open Framework Aluminophosphate [Al2P3O12][C4N3H16]

A 3-D open-framework nickel aluminophosphate [NiAlP2O8][C2N2H9] has been solvothermally synthesized using ethylene glycol as the solvent and ethylenediamine as the template. Its structure is assembled through 1-D AlP2O83- chains with corner-sharing 4-MRs via transition metal Ni2+ ions. The 1-D AlP2O83- chains are connected through octahedral Ni atoms, which are coordinated to the terminal oxygens of 1-D AlP2O83- chains and the amino groups of the template. Infinite Ni−O−Ni chains are formed along the [001] direction.

Three-Dimensional Open-Framework Nickel Aluminophosphate [NiAlP2O8][C2N2H9]: Assembly of One-Dimensional AlP2O83- Chains through [NiO5N] Octahedra

Employing phenol, an aromatic and acidic organic solid, as the solvent, and triethylene tetramine as the template, a new two-dimensional layered aluminophosphate [Al2P4O16][C6H22N4][C2H10N2] has been solvothermally synthesized for the first time, which contains novel 4.12-net porous sheets.

A new layered aluminophosphate [Al2P4O16][C6H22N4][C2H10N2] with 4.12-net porous sheets

The synthesis of offretite single crystals in the system containing pyrocatechol or F

Solvothermal Synthesis and Characterization of a New 3-D Open Framework Aluminophosphate [Al2P3O12] [C4N3H16].

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