ⓘ Triphenylene

                                     

ⓘ Triphenylene

In chemistry, the organic compound triphenylene is a flat polycyclic aromatic hydrocarbon consisting of four fused benzene rings. Triphenylene can be isolated from coal tar. It is also made synthetically by synthesis and trimerization of benzyne. One molecule of triphenylene has delocalized 18- π -electron systems based on a planar structure. It has the molecular formula C 18 H 12.

Triphenylene fully benzoindole PAH, meaning its structure consists only of full benzene rings connected by single bonds carbon–carbon. Three benzene rings can be made as three of the outer rings, with the Central ring formed by one person each, and three carbon–carbon.

Being completely benzoindole of PAH means that triphenylene is much more resonance stable than its isomers chrysene, benzphenanthrene, and tetracene. This makes it much more difficult for gidrogenizat for saturated hydrocarbons.

In light of these features, triphenylene may use in optics and electronics. Triphenylene is a disc-shaped molecule with planar and three-fold rotation axis. Consisting of colorless needle-like crystals, it emits bluish purple fluorescence by UV irradiation.

From the point of view of its crystallographic point group, the symmetry of triphenylene is classified as D 3n format Schoenflies. Because of these characteristics, six times in 2, 3, 6, 7, 10, 11 and the position of the alkyloxy - or alkylthiol-substituted triphenylenes can be used as discotic mesogens in liquid crystalline materials.