Fabrication of carbon chains (pseudo carbynes) by stabilization with gold-thiol complex

The quest for crystals of sp1 bonded carbon chains or carbynes has been a goal of several research groups. In this paper, we report a new method based on chemical synthesis that can produce a large amount of polycrystalline carbon chains. We use a solution of 1-dodecanothiol and gold salts that are...

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Veröffentlicht in:Carbon (New York) 2024-05, Vol.225, p.119118, Article 119118
Hauptverfasser: Velázquez Salazar, J. Jesús, Bahena, Daniel, Lehr, Alexander, Tarakeshwar, Pilarisetty, Sanchez, John, Rogers, Blake, Caudillo, Román, Lin, Guowu, Calero, Guillermo, Yacaman, Miguel José
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Sprache:eng
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Zusammenfassung:The quest for crystals of sp1 bonded carbon chains or carbynes has been a goal of several research groups. In this paper, we report a new method based on chemical synthesis that can produce a large amount of polycrystalline carbon chains. We use a solution of 1-dodecanothiol and gold salts that are subjected to microwave radiation. The resulting material is a white powder containing carbon chains stabilized by thiolates as predicted by Tarakeshwar et al. [1]. We used Raman spectroscopy, X Ray Diffraction, and TEM to characterize the material. After crystallization of the sample, we found a prominent phase, a hexagonal lattice with (P6mm) space group and parameters a = 6.2 Å and c = 8.8 Å. However, other phases might be present. Gold nanoparticles with thiolate on the surface act as catalysts for chain formation and this promotes the rapid growth of carbon chains. Our material is a pseudo carbyne and not a pure carbon allotrope since it contains gold and sulfur. Nevertheless, this work opens the door to fabricating enough material for research on the properties of sp1 bonded carbon materials. [Display omitted]
ISSN:0008-6223
DOI:10.1016/j.carbon.2024.119118