Perylene
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Perylene or perilene is a polycyclic aromatic hydrocarbon with the chemical formula C 20 H 12 , occurring as a brown solid. It or its derivatives may be carcinogenic, and it is considered to be a hazardous pollutant. In cell membrane cytochemistry, perylene is used as a fluorescent lipid probe. It is the parent compound of a class of rylene dyes.
Perylene or perilene is a polycyclic aromatic hydrocarbon with the chemical formula C 20 H 12 , occurring as a brown solid. It or its derivatives may be carcinogenic, and it is considered to be a hazardous pollutant. In cell membrane cytochemistry, perylene is used as a fluorescent lipid probe. It is the parent compound of a class of rylene dyes. ==Reactions== Like other polycyclic aromatic compounds, perylene is reduced by alkali metals to give a deeply colored radical anion and a dianion. The diglyme solvates of these salts have been characterized by X-ray crystallography. ==Emission== Perylene displays blue fluorescence. It is used as a blue-emitting dopant material in OLEDs, either pure or substituted. Perylene can also be used as an organic photoconductor. It has an absorption maximum at 434 nm, and as with all polycyclic aromatic compounds, low water solubility ( mmol/L). Perylene has a molar absorptivity of 38,500 M −1 cm −1 at 435.7 nm. Image:Perylene-LongWaveUV.png|Perylene dissolved in dichloromethane exposed to Long Wave UV radiation Image:Perylene-ShortWaveUV.png|Perylene dissolved in dichloromethane exposed to Short Wave UV radiation ==Structure== typical example of a structure with a perylene core]] The perylene molecule consists of two naphthalene molecules connected by a carbon-carbon bond at the 1 and 8 positions on both molecules. All of the carbon atoms in perylene are sp 2 hybridized. The structure of perylene has been extensively studied by X-ray crystallography. ==Biology== Naturally occurring perylene quinones have been identified in lichens Laurera sanguinaria and Graphis haematites. See also blue amber. ==References==
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