General Solution‐Phase Synthesis of Nanoscale Transition Metal Tellurides Using Metal Nanoparticle Reagents

Fenton, Julie L.; Fagan, Abigail M.; Schaak, Raymond E.

doi:10.1002/ejic.201900560

Cited by 6 publications

(8 citation statements)

References 36 publications

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“…There are few reports of interconversions of metal sulfide, selenide, and telluride NPs through anion exchange, yet such interconversions would afford a range of new phases, morphologies, and nanoheterostructures based on the well-developed syntheses of metal sulfides and selenides. This is especially important given that the direct solution synthesis of metal tellurides is often problematic due to the tendency to form tellurium oxide and the reactivity of many tellurium reagents . One route around this difficulty is the transformation of metal to metal telluride NPs under mild conditions, albeit without morphology retention .…”

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confidence: 99%

“…This is especially important given that the direct solution synthesis of metal tellurides is often problematic due to the tendency to form tellurium oxide and the reactivity of many tellurium reagents . One route around this difficulty is the transformation of metal to metal telluride NPs under mild conditions, albeit without morphology retention . In one example of the introduction of Te into a metal sulfide NP, Saruyama et al converted CdS spheres to CdS–CdTe tear drops, affording a distinct CdTe crystal system and significant morphology alteration .…”

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confidence: 99%

“…29 One route around this difficulty is the trans- formation of metal to metal telluride NPs under mild conditions, albeit without morphology retention. 29 In one example of the introduction of Te into a metal sulfide NP, Saruyama et al converted CdS spheres to CdS−CdTe tear drops, affording a distinct CdTe crystal system and significant morphology alteration. 30 This conversion was driven by the stronger TOP=S bond formed when S 2− was removed from the particle to be replaced with Te 2− , suggesting that their approach should be widely applicable.…”

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Multistep Regioselectivity and Non-Kirkendall Anion Exchange of Copper Chalcogenide Nanorods

et al. 2021

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Chemical reactions that modify the compositions of nanoparticles are important for optoelectronic and catalytic applications. Understanding how they occur, and the unique features that can be produced as a result, is an important prerequisite to designing intricate nanostructures with complex morphologies. Here, we report the conversion of α-chalcocite copper sulfide nanorods into weissite copper telluride nanorods through anion exchange. By examining the elemental composition, morphology, and crystallinity post exchange, it was found that the tellurium ions replaced sulfur ions to generate weissite in a way that maintained the (pseudo-)hexagonally close-packed sublattice as well as the morphology and crystallinity. Unusually, the anion exchange proceeded without inducing voids in the product nanoparticles. Such voids, produced through the Kirkendall effect, are commonly observed during nanocrystal anion exchange reactions, yet can be important to avoid minimizing defects. The lack of void formation was explained by the balancing of inward and outward anion diffusion offered by nanoscopic pathways that formed within the nanorods at the early stages of the anion exchange reaction. The presence of these exchange-facilitating faults results in an unusual multistep process altering the locations at which copper telluride regions emerged during partial exchange. Three different anion movement regimes resulted in three distinct geometries. Initially, a nearisotropic exchange produced a copper sulfide/copper telluride core−shell structure. As the exchange progressed, the defect-mediated movement resulted in irregularly shaped copper sulfide domains within copper telluride. Phase segregation then led to a unique double-core copper sulfide/copper telluride heterostructure. This work offers insights into the mechanism behind anion exchange, highlights the design capabilities emergent from defective materials, and creates new opportunities for rational synthesis of complex nanoheterostructures.

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Multistep Regioselectivity and Non-Kirkendall Anion Exchange of Copper Chalcogenide Nanorods

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“…For example, (Me 3 Si) 2 Te reacts with pre-formed colloidal metal nanoparticles of Pd, Pt and Ni under sufficiently mild conditions (180 °C, 1h) to form their corresponding ditellurides PdTe 2 , PtTe 2 , and NiTe 2 . 111 Other metal nanoparticles of Co, Ag, and Rh also form crystalline metal tellurides upon reaction with (Me 3 Si) 2 Te, indicating that this approach to synthesizing nanoscale transition metal tellurides is ). 108,112,113 The shape, single crystallinity, and orientation of the parent metal oxide NPs are completely preserved in the transformed particles.…”

Section: Miscelleneous Methdsmentioning

confidence: 97%

Ultra-mild synthesis of nanometric metal chalcogenides using organyl chalcogenide precursors

Mishra

2022

Chem. Commun.

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“…Fenton et al [62] reported metal tellurides are vital materials used for different applications such as photovoltaic, catalytic and thermoelectric purposes. Hence, he came up with a novel method of synthesising the nanoscale transition metal tellurides by the interaction of pre-formed colloidal metal nanoparticle and bis(trimethylsilyl)telluride using solution-phase synthesis.…”

Section: Synthesis Of Inorganic Compoundsmentioning

confidence: 99%

An overview of recent progress in modern synthetic approach—combinatorial synthesis

Gopi¹,

Krupamai²,

Sri³

et al. 2020

Beni-Suef Univ J Basic Appl Sci

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Background In recent times, a powerful tool of combinatorial synthesis has been used for the preparation of large chemical entities through a small set up of reactions between different building blocks using solid-phase and solution-phase techniques. This method reduced the time and cost of the drug discovery process substantially. Main text Thousands of compounds are synthesised in a few reactions through combinatorial synthesis instead of getting a few compounds in the traditional method. This method also helps to identify chemical lead of the compounds and optimise them through the biological screening using a high-throughput method. There is no review concerning the recent research finding of combinatorial synthesis. Hence, an attempt had been made on the latest research findings (2002–2020) of newly synthesised compounds using combinatorial synthesis and their biological activities. Conclusion To the best of our knowledge, the current review has completely analysed the importance of combinatorial synthesis and furnished an overview of solid-phase and solution-phase techniques as well as helped mankind by improving higher productivity at low cost, lead identification and optimization and preventing environmental pollution. Graphical abstract

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General Solution‐Phase Synthesis of Nanoscale Transition Metal Tellurides Using Metal Nanoparticle Reagents

Cited by 6 publications

References 36 publications

Multistep Regioselectivity and Non-Kirkendall Anion Exchange of Copper Chalcogenide Nanorods

Multistep Regioselectivity and Non-Kirkendall Anion Exchange of Copper Chalcogenide Nanorods

Ultra-mild synthesis of nanometric metal chalcogenides using organyl chalcogenide precursors

An overview of recent progress in modern synthetic approach—combinatorial synthesis

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