Tetracene

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For the initiating explosive, see tetrazene.
Tetracene
Skeletal formula
Ball-and-stick model
Tetracene crystals
Identifiers
CAS number 92-24-0 YesY
PubChem 7080
ChemSpider 6813 YesY
ChEBI CHEBI:32600 YesY
Jmol-3D images Image 1
Properties
Molecular formula C18H12
Molar mass 228.29 g/mol
Appearance Yellow to orange solid
Melting point 357 °C (675 °F; 630 K)
Solubility in water Insoluble
Hazards
EU Index Not listed
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
 YesY (verify) (what is: YesY/N?)
Infobox references

Tetracene, also called naphthacene, is a polycyclic aromatic hydrocarbon. It has the appearance of a pale orange powder. Tetracene is the four-ringed member of the series of acenes, the previous one being anthracene (tricene) and the next one being pentacene.

Tetracene is a molecular organic semiconductor, used in organic field-effect transistors (OFETs) and organic light-emitting diodes (OLEDs). In May 2007, researchers from two Japanese universities, Tohoku University in Sendai and Osaka University, reported an ambipolar light-emitting transistor made of a single tetracene crystal.[1] Ambipolar means that the electric charge is transported by both positively charged holes and negatively charged electrons. Tetracene can be also used as a gain medium in dye lasers as a sensitiser in chemoluminescence.

Jan Hendrik Schön during his time at Bell Labs (1997–2002) claimed to have developed an electrically pumped laser based on tetracene. However, his results could not be reproduced, and this is considered to be a scientific fraud.[2]

In February 2014, NASA announced a greatly upgraded database for tracking polycyclic aromatic hydrocarbons (PAHs), including Tetracene, in the universe. According to scientists, more than 20% of the carbon in the universe may be associated with PAHs, possible starting materials for the formation of life. PAHs seem to have been formed shortly after the Big Bang, are widespread throughout the universe, and are associated with new stars and exoplanets.[3]

References[edit]

  1. ^ T. Takahashi, T. Takenobu, J. Takeya, Y. Iwasa (2007). "Ambipolar Light-Emitting Transistors of a Tetracene Single Crystal". Advanced Functional Materials 17 (10): 1623–1628. doi:10.1002/adfm.200700046. 
  2. ^ Agin, Dan (2007). Junk Science: An Overdue Indictment of Government, Industry, and Faith Groups That Twist Science for Their Own Gain. Macmillan. ISBN 978-0-312-37480-8. 
  3. ^ Hoover, Rachel (February 21, 2014). "Need to Track Organic Nano-Particles Across the Universe? NASA's Got an App for That". NASA. Retrieved February 22, 2014.