This review provides a discussion of the current state of research on linear carbon structures
and related materials based on sp-hybridization of carbon atoms (polyynes and cumulenes) …

Conspectus The formation and study of molecules that model the sp-hybridized carbon
allotrope, carbyne, is a challenging field of synthetic physical organic chemistry. The target …

Besides graphite and diamond, the solid allotropes of carbon in sp2 and sp3 hybridization,
the possible existence of a third allotrope based on the sp-carbon linear chain, the carbyne …

The versatility of carbon is revealed in its all-carbon forms (allotropes), which feature unique
properties (consider the differences between diamond, graphite, graphene and fullerenes) …

Linear carbon chains (LCCs) are a one-dimensional sp 1-hybridized allotrope of carbon.
LCCs are extremely unstable: The longer the LCCs, the less stable the materials. Thus, it is …

Extended conjugated polyynes provide models for the elusive sp carbon polymer carbyne,
but progress has been hampered by numerous synthetic challenges. Stabilities appear to be …

Graphene, nanotubes and other carbon nanostructures have shown potential as candidates
for advanced technological applications due to the different coordination of carbon atoms …

We experimentally quantify the Raman scattering from individual carbyne chains confined in
double-walled carbon nanotubes. We find that the resonant differential Raman cross section …

Bis (biphenyl)-capped polyynes are investigated to unveil the modulation of the electronic
and optical properties of sp-hybridized carbon-atom wires (CAWs) capped with π …

Symmetrically and unsymmetrically endcapped polyynes (triisopropylsilyl–TIPS–and super
trityl endcapping groups) have been studied with density functional theory calculations and …