Kinetic and thermodynamic stability of cluster compounds under heating

Логвиненко, В. А.; Fedorov, V. E.; Mironov, Yuri V.; Drebushchak, V. A.

doi:10.1007/s10973-006-8057-5

Cited by 18 publications

(2 citation statements)

References 15 publications

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“…A decrease of the bandgaps and a slight shift of the flatband potentials corresponding to a shift of Fermi levels are concomitantly observed for both chalcogenide films (Figure 4, 6 and 7). Because of the stability of halide rhenium cluster complexes up to 200 °C during the heating process, [ 41 ] the variation of their physical properties is attributed to the removing of water solvent molecules surrounding the clusters without modification of the ligand arrangement ([{Re 6 S i 8 }Cl a 5 (H 2 O) a ] and [{Re 6 Se i 8 }Cl a 5 (H 2 O) a ]) within the cluster unit. The loss of water molecules induces a decrease of: 1) the distance between the cluster building blocks and 2) the thickness of the films.…”

Section: Resultsmentioning

confidence: 99%

Nanoarchitectonics of Metal Atom Cluster‐Based Building Blocks Applied to the Engineering of Photoelectrodes for Solar Cells

et al. 2023

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This study deals with the nanoarchitectonic concept applied to the design of photoelectrodes built on two types of cluster core building blocks, namely, {Re6Si 8} and {Re6Sei 8}. The effect of the nature of the metal/ligand on photoinduced conductivity properties is thus investigated through an in‐depth photoelectrochemical study and it is rationalized by the establishment of an energy diagram using a set of complementary optical (ultraviolet–vis–near infrared), electrochemical and spectroscopic (X‐ray photoelectron spectroscopy) characterization techniques. The optical and electronic properties of {Re6Qi 8}‐based films (Q = S or Se) are drastically dependent on the composition. The sulfide‐based photoelectrodes exhibit ambipolar behavior with an n‐type domination whereas the selenide‐based photoelectrodes have a p‐type semiconducting behavior. Such electronic properties can be exalted by increasing the interactions between the cluster building blocks by heating. The design of mixed {Re6Qi 8}‐based photoelectrodes combining the two n‐{Re6Si 8} and p‐{Re6Sei 8} cluster core‐based building blocks is explored. The physical properties of the heterostructures can be tuned by controlling the {Re6Si 8}:{Re6Sei 8} ratio and the interaction between the clusters. The creation of such nanoarchitectonic p–n junctions allows the optimization of the photocurrents generated by increasing the separated charge state lifetime that turns out to be attractive for solar cell applications.

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Section: Resultsmentioning

confidence: 99%

Nanoarchitectonics of Metal Atom Cluster‐Based Building Blocks Applied to the Engineering of Photoelectrodes for Solar Cells

et al. 2023

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“…The Re 6 cluster compounds emit red and near-infrared (NIR) radiations, which are very useful for biotechnological applications. Firstly, they prepared some Re 6 cluster units with the A 4 [Re 6 Q 8 L 6 ] formula such as K 4 [Re 6 Se 8 (OH) 6 ] and Cs 4 [Re 6 S 8 Br 6 ] at high temperatures [78,79,80]. Then, they reported a preparation of Re 6 cluster units encapsulated in the nanodroplets of a reverse microemulsion consisting of n-heptane/polyoxyethylene-4-lauryl ether (Brij 30) in an aqueous solution of Re 6 cluster and ammonia.…”

Section: Recent Investigations On the Microemulsion-based Synthesimentioning

confidence: 99%

A Review of The Lesser-Studied Microemulsion-Based Synthesis Methodologies Used for Preparing Nanoparticle Systems of The Noble Metals, Os, Re, Ir and Rh

2019

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This review focuses on the recent advances in the lesser-studied microemulsion synthesis methodologies of the following noble metal colloid systems (i.e., Os, Re, Ir, and Rh) using either a normal or reverse micelle templating system. The aim is to demonstrate the utility and potential of using this microemulsion-based approach to synthesize these noble metal nanoparticle systems. Firstly, some fundamentals and important factors of the microemulsion synthesis methodology are introduced. Afterward, a review of the investigations on the microemulsion syntheses of Os, Re, Ir, and Rh nanoparticle (NP) systems (in all forms, viz., metallic, oxide, mixed-metal, and discrete molecular complexes) is presented for work published in the last ten years. The chosen noble metals are traditionally very reactive in nanosized dimensions and have a strong tendency to aggregate when prepared via other methods. Also, the particle size and particle size distribution of these colloids can have a significant impact on their catalytic performance. It is shown that the microemulsion approach has the capability to better stabilize these metal colloids and can control the size of the synthesized NPs. This generally leads to smaller particles and higher catalytic activity when they are tested in applications.

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Influence of ion size on the stability of chloroplumbates containing PbCl 5 − or PbCl 6 2−

Storoniak

Kabir

Błażejowski

2008

J Therm Anal Calorim

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Kinetic and thermodynamic stability of cluster compounds under heating

Cited by 18 publications

References 15 publications

Nanoarchitectonics of Metal Atom Cluster‐Based Building Blocks Applied to the Engineering of Photoelectrodes for Solar Cells

Nanoarchitectonics of Metal Atom Cluster‐Based Building Blocks Applied to the Engineering of Photoelectrodes for Solar Cells

A Review of The Lesser-Studied Microemulsion-Based Synthesis Methodologies Used for Preparing Nanoparticle Systems of The Noble Metals, Os, Re, Ir and Rh

Influence of ion size on the stability of chloroplumbates containing PbCl 5 − or PbCl 6 2−

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