Perylene: Difference between revisions
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Latest revision as of 13:48, 6 September 2012
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WikiDoc Resources for Perylene |
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Articles |
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Most recent articles on Perylene |
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Media |
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Evidence Based Medicine |
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Clinical Trials |
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Ongoing Trials on Perylene at Clinical Trials.gov Clinical Trials on Perylene at Google
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Guidelines / Policies / Govt |
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US National Guidelines Clearinghouse on Perylene
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Books |
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News |
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Commentary |
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Definitions |
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Patient Resources / Community |
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Directions to Hospitals Treating Perylene Risk calculators and risk factors for Perylene
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Healthcare Provider Resources |
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Causes & Risk Factors for Perylene |
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Continuing Medical Education (CME) |
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International |
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Business |
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Experimental / Informatics |
Overview
Perylene or perilene is a polycyclic aromatic hydrocarbon with chemical formula Template:Carbon20Template:Hydrogen12 and CAS number Template:CASREF, 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.
Emission
Perylene displays blue fluorescence. It is used as a blue-emitting dopant material in OLEDs, either pure or substituted. Perylene can be also used as an organic photoconductor. It has an absorption maximum at 434nm, and as with all polycyclic aromatic compounds, low water solubility (1.2 x 10-5 mmol/l). Perylene has a molar extinction coefficient of 38,500 M-1cm-1 at 435.75 nm.
Structure
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 sp2 hybridized. When drawing the structure of perylene, it is important not to represent the center ring as a fifth benzene ring. By doing so, this would cause two of the carbons to become sp3 hybridized causing part of the molecule to lose its aromaticity, and therefore its ability to fluoresce. The structure of perylene has been extensively studied by X-ray crystallography.[1]
References
- ↑ Donaldson, D. M.; Robertson, J. M.; White, J. G. "The crystal and molecular structure of perylene." Proc. R. Soc. Lond. A Math. Phys. Sci. 1953, 220, 311–321. First Page (JSTOR)