Graphyne

Graphyne is an

allotrope Allotropy or allotropism () is the property of some chemical elements to exist in two or more different forms, in the same physical state, known as allotropes of the elements. Allotropes are different structural modifications of an element: the ...

carbon Carbon () is a chemical element with the symbol C and atomic number 6. It is nonmetallic and tetravalent—its atom making four electrons available to form covalent chemical bonds. It belongs to group 14 of the periodic table. Carbon makes ...

. Its structure is one-atom-thick

planar Planar is an adjective meaning "relating to a plane (geometry)". Planar may also refer to: Science and technology * Planar (computer graphics), computer graphics pixel information from several bitplanes * Planar (transmission line technologies), ...

sheets of sp and sp²-bonded carbon atoms arranged in crystal lattice. It can be seen as a lattice of

benzene Benzene is an organic chemical compound with the molecular formula C6H6. The benzene molecule is composed of six carbon atoms joined in a planar ring with one hydrogen atom attached to each. Because it contains only carbon and hydrogen ato ...

rings connected by

acetylene Acetylene ( systematic name: ethyne) is the chemical compound with the formula and structure . It is a hydrocarbon and the simplest alkyne. This colorless gas is widely used as a fuel and a chemical building block. It is unstable in its pur ...

bonds. The material is called graphyne-''n'' when benzene rings are connected by ''n'' sequential acetylene molecules, and graphdiyne for a particular case of ''n'' = 2 (

diacetylene Diacetylene (also known as butadiyne) is the organic compound with the formula C4H2. It is the simplest compound containing two triple bonds. It is first in the series of polyynes, which are of theoretical but not of practical interest. Occurr ...

links). Depending on the content of acetylene groups, graphyne can be considered a mixed hybridization, sp^k, where 1 < k < 2, and thus differs from the hybridization of

graphene Graphene () is an allotrope of carbon consisting of a Single-layer materials, single layer of atoms arranged in a hexagonal lattice nanostructure.

(considered pure sp²) and

diamond Diamond is a solid form of the element carbon with its atoms arranged in a crystal struct