A flat polycyclic aromatic hydrocarbon (PAH), it consists of four fused benzene rings.Triphenylene has delocalized 18-π-electron systems based on a planar structure, corresponding to the symmetry group D3h.[3] Another method involves trapping benzyne with a biphenyl derivative.[4] Triphenylene is more resonance stable than its isomers chrysene, benz[a]anthracene, benzo[c]phenanthrene, and tetracene.[5] As a disc-shaped, planar molecule, triphenylene has attracted attention as the core of discotic mesogen in liquid crystalline materials.