Solution and surfactant-free growth of supported high index facet SERS active nanoparticles of rhenium by phase demixing

Valenzuela, Carolina; Valenzuela, Marı́a Luisa; Caceres, S.; O’Dwyer, Colm

doi:10.1039/c2ta00262k

Cited by 20 publications

(12 citation statements)

References 58 publications

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“…ReNPs and its compounds possess unique physiochemical properties such as good mechanical properties, refractoriness, and chemical inertness against some gasses, making them promising materials for nanoelectrode [158], SERS [159], sensor [160], and catalytic activities including isomerization [161], hydrogenation [162], and reduction [163]. However, compared to other transition metals, there are few papers reporting the synthesis of ReNPs, likely due to their high surface energy which could result in the oxidation of as-synthesized metallic ReNPs, [163].…”

Section: Metal Rhenium Nanoparticlesmentioning

confidence: 99%

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Synthesis of cobalt, palladium, and rhenium nanoparticles

2020

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Over the past decade, metal nanoparticles (MNPs) have attracted extensive attention due to their unique physiochemical properties that make them highly applicable in various fields such as chemical sensing, energy storage, catalysis, medicine, and environmental engineering. Their physiochemical properties depend drastically on the MNP size and morphology, which are largely determined by their synthesis methods. Research on MNPs predominantly focused on coinage metals (Au, Ag and Cu), but in the last decade research on metals with a relatively high melting temperature such as Pd, Co, and Re has seen rapid increases, mainly driven by their potential applications as catalysts. This paper presents the recent advances on different synthesis techniques of Co, Pd, and Re nanoparticles, their resulting nanostructures, as well as existing and potential applications.

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Section: Metal Rhenium Nanoparticlesmentioning

confidence: 99%

“…Recently, a solid-state surfactant-free approach was developed by Valenzuela et al [159]. A mixture of K[ReO 4 ] and cyclotriphosphazene [NP(O 2 C 12 H 8 )] 3 was dissolved in dichloromethane, stirred for 24 h and dried.…”

Section: Rhenium-based Nanocompositesmentioning

confidence: 99%

Synthesis of cobalt, palladium, and rhenium nanoparticles

2020

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“…Such systems give rise to potential applications including drug delivery systems, biological activity, and catalysis . Such systems have also been used as base support for the formation of nanomaterials, as well as heterocyclic‐triphosphazenes that can form interacting host‐guest systems. They are capable of acting as precursors for polymer obtention .…”

Section: Introductionmentioning

confidence: 99%

Role of donor‐acceptor functional groups in N₃P₃ cyclic‐triphosphazene backbone. Unraveling bonding characteristics from natural orbitals within an extended transition state‐natural orbital for the chemical valence scheme

Linares‐Flores

Ramírez-Tagle

Rojas-Poblete

et al. 2019

Int J of Quantum Chemistry

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The formation of cyclophosphazenes containing several ligands or substituent groups gives rise to an attractive derivative set, for development of novel applications, with variable properties. Here, it is possible to unravel the role of different functional groups attached to the N 3 P 3 backbone, to reach a better understanding of the bonding character in the cyclic [─P─N─] skeleton. We employed the extended transition state-natural orbital for the chemical valence scheme to unravel the σ and π orbital kernels that are involved in the assembling of such structures, by varying the acceptor-donor characteristics of the ─CF 3 , ─NO 2 , ─COOH, ─CN, ─NH 2 , ─OH, and ─OCH 3 groups, where ─NO 2 behaves as a stronger electron-withdrawing substituent rather than ─CF 3 , ─COOH, and ─CN, denoting that the nature of the ligandphosphazene interaction contributes to some degree to the bond strength of the cyclic [─P─N─] backbone. Our results reveal that the electron-withdrawing ─NO 2 group leads to higher σ and π [─P─N─] orbital-energy contributions, which is reflected in a shortening of the [─P─N─] distance, contrasting with the case of electron-donating groups such as ─NH 2 , ─OH, and ─OCH 3 within the phosphazene set. These insights allow further variation and modulation of the bonding in the [─P─N─] ring.

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“…Surprisingly, there is a lack of information in the literature about the synthesis of pure rhenium nanoparticles (Re NPs). Although there are some examples [4][5][6][7][8][9][10], they all suffer from difficult synthetic protocols, polydispersity, high oxidation state and/or incomplete characterization. Thus, the preparation of well-controlled uniformly dispersed and reproducible Re NPs still remains challenge.…”

Section: Introductionmentioning

confidence: 99%

Facile One-Pot Synthesis of Rhenium Nanoparticles

et al. 2014

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This paper describes the organometallic synthesis of pure rhenium nanoparticles (Re NPs) and their characterization by a combination of state-of-the art techniques (TEM, HAADF-STEM, EDX, WAXS, EA, FT-IR). The Re NPs synthesis is achieved by reducing the [Re 2 (C 3 H 5 ) 4 ] complex in solution under a dihydrogen atmosphere and in the presence of hexadecylamine or polyvinylpyrrolidone as stabilizing agents. The so-obtained Re NPs are monodisperse with a mean size of 1.1 nm (0.3) nm and display a spherical shape with a disordered hcp structure.

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Solution and surfactant-free growth of supported high index facet SERS active nanoparticles of rhenium by phase demixing

Cited by 20 publications

References 58 publications

Synthesis of cobalt, palladium, and rhenium nanoparticles

Synthesis of cobalt, palladium, and rhenium nanoparticles

Role of donor‐acceptor functional groups in N₃P₃ cyclic‐triphosphazene backbone. Unraveling bonding characteristics from natural orbitals within an extended transition state‐natural orbital for the chemical valence scheme

Facile One-Pot Synthesis of Rhenium Nanoparticles

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Solution and surfactant-free growth of supported high index facet SERS active nanoparticles of rhenium by phase demixing

Cited by 20 publications

References 58 publications

Synthesis of cobalt, palladium, and rhenium nanoparticles

Synthesis of cobalt, palladium, and rhenium nanoparticles

Role of donor‐acceptor functional groups in N3P3 cyclic‐triphosphazene backbone. Unraveling bonding characteristics from natural orbitals within an extended transition state‐natural orbital for the chemical valence scheme

Facile One-Pot Synthesis of Rhenium Nanoparticles

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Role of donor‐acceptor functional groups in N₃P₃ cyclic‐triphosphazene backbone. Unraveling bonding characteristics from natural orbitals within an extended transition state‐natural orbital for the chemical valence scheme