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para-Azoxyanisole

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para-Azoxyanisole
Para-Azoxyanisole
Names
IUPAC name 1-methoxy-4-benzene
Other names p-Azoxyanisole
Identifiers
CAS Number
3D model (JSmol)
ChemSpider
PubChem CID
InChI
  • InChI=1S/C14H14N2O3/c1-18-13-7-3-11(4-8-13)15-16(17)12-5-9-14(19-2)10-6-12/h3-10H,1-2H3/b16-15-Key: KAEZRSFWWCTVNP-NXVVXOECSA-N
  • InChI=1/C14H14N2O3/c1-18-13-7-3-11(4-8-13)15-16(17)12-5-9-14(19-2)10-6-12/h3-10H,1-2H3/b16-15-Key: KAEZRSFWWCTVNP-NXVVXOECBU
SMILES
  • COc2ccc(\N=(/)c1ccc(OC)cc1)cc2
Properties
Chemical formula C14H14N2O3
Molar mass 258.27 g/mol
Density 1.14g/cm3
Melting point 114.9 °C (238.8 °F; 388.0 K)
Boiling point 417.9°C @ 760mmHg
Hazards
Flash point 206.6°C
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). checkY verify (what is  ?) Infobox references
Chemical compound

para-Azoxyanisole (PAA) is an organic, aromatic compound. In a solid state, it appears as a white powder, but when heated it forms a liquid crystal. As one of the first known and most readily prepared liquid crystals, PAA has been played an important role in the development of liquid crystal displays.

Its liquid crystal range is from 118 °C to 136 °C. The solid to nematic transition is at 118 °C and the nematic to isotropic liquid transition at 136 °C.

References

  1. ^ Shao, Y.; Zerda, T. W. (1998). "Phase Transitions of Liquid Crystal PAA in Confined Geometries". Journal of Physical Chemistry B. 102 (18): 3387–3394. doi:10.1021/jp9734437.{{cite journal}}: CS1 maint: multiple names: authors list (link)
  2. Liquid Gold: The Story of Liquid Crystal Displays and the Creation of an Industry, Joseph A. Castellano, ISBN 978-9812389565
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