  By means of ab initio calculations we investigate the possibility of
existence of a boron nitride (BN) porous two-dimensional nanosheet which is
geometrically similar to the carbon allotrope known as biphenylene carbon. The
proposed structure, which we called Inorganic Graphenylene (IGP), is formed
spontaneously after selective dehydrogenation of the porous Boron Nitride (BN)
structure proposed by Ding et al. We study the structural and electronic
properties of both porous BN and IGP and it is shown that, by selective
substitution of B and N atoms with carbon atoms in these structures, the band
gap can be significantly reduced, changing their behavior from insulators to
semiconductors, thus opening the possibility of band gap engineering for this
class of two-dimensional materials.
