Botos, A, Biskupek, J, Chamberlain, TW orcid.org/0000-0001-8100-6452 et al. (7 more authors) (2016) Carbon Nanotubes as Electrically Active Nanoreactors for Multi-Step Inorganic Synthesis: Sequential Transformations of Molecules to Nanoclusters and Nanoclusters to Nanoribbons. Journal of the American Chemical Society, 138 (26). pp. 8175-8183. ISSN 0002-7863
Abstract
In organic synthesis, the composition and structure of products are predetermined by the reaction conditions; however, the synthesis of well-defined inorganic nanostructures often presents a significant challenge yielding nonstoichiometric or polymorphic products. In this study, confinement in the nanoscale cavities of single-walled carbon nanotubes (SWNTs) provides a new approach for multistep inorganic synthesis where sequential chemical transformations take place within the same nanotube. In the first step, SWNTs donate electrons to reactant iodine molecules (I₂), transforming them to iodide anions (I–). These then react with metal hexacarbonyls (M(CO)₆, M = Mo or W) in the next step, yielding anionic nanoclusters [M₆I₁₄]2–, the size and composition of which are strictly dictated by the nanotube cavity, as demonstrated by aberration-corrected high resolution transmission electron microscopy, scanning transmission electron microscopy, and energy dispersive X-ray spectroscopy. Atoms in the nanoclusters [M₆I₁₄]2– are arranged in a perfect octahedral geometry and can engage in further chemical reactions within the nanotube, either reacting with each other leading to a new polymeric phase of molybdenum iodide [Mo₆I₁₂]n or with hydrogen sulfide gas giving rise to nanoribbons of molybdenum/tungsten disulfide [MS₂]n in the third step of the synthesis. Electron microscopy measurements demonstrate that the products of the multistep inorganic transformations are precisely controlled by the SWNT nanoreactor with complementary Raman spectroscopy revealing the remarkable property of SWNTs to act as a reservoir of electrons during the chemical transformation. The electron transfer from the host nanotube to the reacting guest molecules is essential for stabilizing the anionic metal iodide nanoclusters and for their further transformation to metal disulfide nanoribbons synthesized in the nanotubes in high yield.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2016, American Chemical Society. This document is the Accepted Manuscript version of a Published Work that will appear in final form in Journal of American Chemical Society, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://dx.doi.org/10.1021/jacs.6b03633. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Carbon Nanotube, Charge Transfer, Nanoparticle, Nanoreactor, Nanoribbon |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemistry (Leeds) > Inorganic Chemistry (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 17 Jun 2016 12:20 |
Last Modified: | 24 Sep 2020 14:14 |
Published Version: | http://dx.doi.org/10.1021/jacs.6b03633 |
Status: | Published |
Publisher: | American Chemical Society |
Identification Number: | 10.1021/jacs.6b03633 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:100999 |