The molybdenum and rhenium octahedral cluster chalcohalides in solid state chemistry: From condensed to discrete cluster units

Перрин, А.; Perrin, Christiane

doi:10.1016/j.crci.2012.07.004

Cited by 37 publications

(30 citation statements)

References 244 publications

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“…1a). Some reviews summarized details on syntheses, structures and properties of various cluster complexes including those heteroleptic inner ligand environment [5][6][7][8][9]. In halides and chalcogenides of molybdenum, tungsten and rhenium each face of the octahedron M 6 is coordinated by a ligand forming the cluster core {M 6 (μ 3 -X) 8 } m+ (M = Mo, W or Re; X = Cl, Br, I, S, Se, or Te) (Fig.…”

Section: Introductionmentioning

confidence: 99%

Octahedral clusters with mixed inner ligand environment: Self-assembly, modification and isomerism

et al. 2014

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Octahedral cluster complexes of transition metals are associated with halogen or chalcogen inner ligands to form edge-bridged {M 6 (μ 2 -X) 12 } or face-capped {M 6 (μ 3 -X) 8 } cluster cores. The partial exchange of X atoms leading to mixed inner ligand environment invokes a distortion of metallic cluster, reduction of symmetry as well as an isomerism of the cluster cores. This review summarizes preparation methods of mixed ligand cluster complexes with the general formulas [{M 6 (μ 2 -X) 12 }L 6 ] n or [{M 6 (μ 3 -X) 8 }L 6 ] n and their structural features.

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Section: Introductionmentioning

confidence: 99%

Octahedral clusters with mixed inner ligand environment: Self-assembly, modification and isomerism

et al. 2014

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“…The availability of these precursors led to an intensive research programme for making new hybrid compounds. Novel coordination compounds, and self-organized structures resulted (refer for instance to the reviews [123,124,144,155,157] [121].…”

Section: Re 6 Cluster Chalcogenides and Chalcohalidesmentioning

confidence: 99%

“…All these compounds are dielectrics[132], some of them are isostructural with molybdenum analogues while others display original structures.This work was subsequently extended to brominated compounds, and a number of new structures were reported, for instance KRe 6 S 5 Br 9[142] or Cs 4 KRe 6 S 8 Br 7[143], if we restrict ourselves to the first reports. Many original arrangements were subsequently published, the detail of which can be found in review articles[123,124,144,145]. Note that some ionic compounds with large countercations (viz.…”

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confidence: 99%

Chevrel Phases: Genesis and Developments

Перрин

Perrin

Chevrel

2019

Structure and Bonding

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This chapter summarizes the important role played by Marcel Sergent in the discovery in the Rennes Laboratory of the Chevrel-Phases, which stimulated considerable interest in the international solid state chemistry community, because of their remarkable superconducting properties. After a brief general introduction to this topic the seminal discoveries associated with these phases between 1970 and 1990 are described. After their initial synthesis and structural determination was discovered, it was necessary to establish their critical superconducting transition temperature, the critical magnetic field and the critical current density in wires, single crystals, and thin films. More recently their applications as battery materials, in catalysis and their thermo-electric properties have been studied and are briefly described. These phases opened up the way not only to a rich solid state chemistry, but also to a rich solution chemistry, which complemented the classical field of transition metal carbonyl clusters. The basic cluster units of the Chevrel-Phases continue to be studied in the Rennes laboratory by the heirs of Marcel Sergent and more widely in the international community.

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“…), and electronic/electrochemical properties with strong potential for energy storage and supply (superconductivity, battery, thermoelectricity, hydrogen affinity, etc.) [15,16]. Typically, octahedral MC are composed of falsefalse{M6L8ifalsefalse}4+ (M = Mo, W, Re) or falsefalse{M6L12ifalsefalse}2+ (M = Nb, Ta) metallic cores (L i = inner ligand), coordinated with halogen or chalcogen functional apical ligands (L a ) [14–18].…”

Section: Introductionmentioning

confidence: 99%

“…In the reduced form, valence electron counts (VECs) are equal to 24 electrons or 16 electrons per false[M6L8iL6afalse]2− or false[M6L12iL6afalse]4− cluster unit, respectively. A strong absorption in both the UV and visible light (Vis) ranges was reported for falsefalse{Mnormalo6normalL8normalifalsefalse}4+ cluster cores coordinating with ligands (L = Cl, Br, I or OCOC n F 2n+1 ), resulting in a prominent luminescent emission within the deep red/NIR region [15–24]. The PL mechanism of such MC is typically ascribed to a type A chromophore absorption followed by separation between the absorption and emission peaks [20].…”

Section: Introductionmentioning

confidence: 99%

Transparent functional nanocomposite films based on octahedral metal clusters: synthesis by electrophoretic deposition process and characterization

et al. 2019

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Transparent optical thin films have recently attracted a growing interest for functional window applications. In this study, highly visible transparent nanocomposite films with ultraviolet (UV)-near-infrared (NIR)-blocking capabilities are reported. Such films, composed of Mo 6 and Nb 6 octahedral metal atom clusters (MC) and polymethylmethacrylate polymer (PMMA), were prepared by electrophoretic deposition on indium tin oxide-coated glass (ITO glass). PMMA was found to improve both the chemical and physical stability of Mo 6 and Nb 6 MCs, resulting in a relatively homogeneous distribution of the clusters within the PMMA matrix, as seen by microstructural observations. The optical absorption spectrum of these transparent MC@polymer nanocomposite films was marked by contributions from their Mo 6 and Nb 6 -based clusters (absorption in the UV range) and from the ITO layer on silica glass (absorption in the NIR range). Mo 6 @PMMA nanocomposite films also exhibited excellent photoluminescence properties, which were preserved even after exposure to 50°C at a relative humidity of 70% for one month. These films cumulate high transparency in the visible range with remarkable UV-NIR blocking properties and represent interesting candidates for functional glass application.

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The molybdenum and rhenium octahedral cluster chalcohalides in solid state chemistry: From condensed to discrete cluster units

Cited by 37 publications

References 244 publications

Octahedral clusters with mixed inner ligand environment: Self-assembly, modification and isomerism

Octahedral clusters with mixed inner ligand environment: Self-assembly, modification and isomerism

Chevrel Phases: Genesis and Developments

Transparent functional nanocomposite films based on octahedral metal clusters: synthesis by electrophoretic deposition process and characterization

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