Para-azoxyanisole

Para-azoxyanisole

Chembox new
Name = Para-Azoxyanisole
ImageFile = Para-Azoxyanisole.png ImageSize = 200px
ImageName = Para-Azoxyanisole
IUPACName = 1-methoxy-4- [(4-methoxyphenyl)-
NNO-azoxy] benzene
Section1 = Chembox Identifiers
CASNo = 1562-94-3
SMILES = COc2ccc(N= [N+] (/ [O-] )c1ccc(OC)cc1)cc2
Section2 = Chembox Properties
Formula = C14H14N2O3
MolarMass = 258.27 g/mol
Density =
MeltingPt = 114.9 °C
BoilingPt =

"para"-Azoxyanisole (PAA) is a zwitterionic liquid crystal. 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,cite journal|title=Phase Transitions of Liquid Crystal PAA in Confined Geometries|author=Shao, Y.; Zerda, T. W.|journal=Journal of Physical Chemistry B|year=1998|volume=102|issue=18|pages=3387–3394|doi=10.1021/jp9734437] p-azoxyanisole has been played an important role in the development of liquid crystal displays. ["Liquid Gold: The Story of Liquid Crystal Displays and the Creation of an Industry", Joseph A. Castellano, ISBN 978-9812389565]

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


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