Scientists have synthesised a new form of Carbon, containing 80 interlocking rings of carbon atoms, five of which are seven-atom carbon rings, and one a five-atom carbon ring.
The odd-numbered rings bend the usually planar orientation of graphene-like substances, warping the new substance away from the usual flat, sheet-like appearance.
By adding the odd-numbered rings, many properties appear changed with respect to graphene. There is a difference in colour, electrical conductivity, and solubility. It also exhibits chirality.
This compound demonstrates that the electrical properties of graphine can be modified in a predictable manner.
The diagram below, taken from the paper published in Nature Magazine, shows how the planarity is warped by the introduction of the odd-numbered carbon rings.