On-surface synthesis and characterization of polyynic carbon chains.

ABSTRACT: Carbyne, an elusive sp-hybridized linear carbon allotrope, has fascinated chemists and physicists for decades. Due to its high chemical reactivity and extreme instability, carbyne was much less explored in contrast to the sp²-hybridized carbon allotropes such as graphene. Herein, we report the on-surface synthesis of polyynic carbon chains by demetallization of organometallic polyynes on the Au(111) surface; the longest one observed consists of ∼60 alkyne units (120 carbon atoms). The polyynic structure of carbon chains with alternating triple and single bonds was unambiguously revealed by bond-resolved atomic force microscopy. Moreover, an atomically precise polyyne, C₁₄, was successfully produced via tip-induced dehalogenation and ring-opening of the d

SUBMITTER: Gao W 

PROVIDER: S-EPMC10896587 | biostudies-literature | 2024 Mar

REPOSITORIES: biostudies-literature