Oligoyne Derivatives as Reactive Precursors for the Preparation of Carbon Nanomaterials

Abstract

Carbon nanomaterials have been the subject of intense research over the past 20 years. Both the physical and all-organic methods used to prepare them possess advantages and drawbacks regarding purity, batch-to-batch uniformity, large-scale production, and conditions of preparation. In this account, we present an overview of 'hybrid methods', in which well-defined, reactive organic precursors based on alkynes are self-assembled and transformed using physical stimuli to produce carbon nanomaterials with different sizes, shapes, and functions.

Emerging Bottom‐Up Strategies for the Synthesis of Graphene Nanoribbons and Related Structures

“…[41,42] In many cases, the sizes and shapes of the resulting materials can be controlled by the solid-state organization of the [n]ynes precursors prior to the reaction. [43][44][45][46] Thus,v arious carbonrich structures including spherical nanoparticles, [47,48] nanotubes, [49,50] nanowires [51] and nanosheets [52,53] have been prepared with relative success.T he real challenge for the preparation of well-defined carbon nanomaterials using this method is to get high fidelity in the self-assembly process prior to the polymerization. In fact, afaulty assembly is likely to lead to undefined materials,limiting their use in electronic applications.I n2 014, Morin and co-workers attempted the synthesis of ac onjugated nanoribbons from as elf-assembled tris(diyne) derivative (compound 1,S cheme 1).…”

Emerging Bottom‐Up Strategies for the Synthesis of Graphene Nanoribbons and Related Structures

“…When longer [ n ]ynes (tetraynes and longer) are used, rapid, sometimes explosive “decomposition” can happen, directly producing graphitized, yet undefined nanomaterials . In many cases, the sizes and shapes of the resulting materials can be controlled by the solid‐state organization of the [ n ]ynes precursors prior to the reaction . Thus, various carbon‐rich structures including spherical nanoparticles, nanotubes, nanowires and nanosheets have been prepared with relative success.…”

Chemical designs of functional photoactive molecular assemblies

“…Morin and co-workers demonstrated PDA preparation protocols in organogels, which form more easily than highly ordered crystals. 107 The occurrence of organogels typically results from supramolecular polymer network (aggregate) formation in the presence of a suitable solvent. Most organogel formation is driven by intermolecular p-p stacking and/or H-bonding among the monomers.…”