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338672

Sigma-Aldrich

4′-(Octyloxy)-4-biphenylcarbonitrile

liquid crystal (nematic)

Synonym(s):

4′-(n -Octyloxy)-4-cyanobiphenyl, 4′-(Octyloxy)-4-biphenylcarbonitrile, 4′-(Octyloxy)-4-cyanobiphenyl, 4′-(Octyloxy)[1,1′-biphenyl]-4-carbonitrile, 4′-Octyloxy-1,1′-biphenyl-4-carbonitrile, 4-(4-Octyloxyphenyl)benzonitrile, 4-(Octyloxy)-4′-cyanobiphenyl, 4-Cyano-4′-(n -octyloxy)biphenyl, 4-Cyano-4′-(octyloxy)-1,1′-biphenyl, 4-Cyano-4′-(octyloxy)biphenyl, 4-Cyano-4′-n -octyloxy-1,1′-biphenyl, p -(Octyloxy)-p ′-cyanobiphenyl, p -Cyano-p ′-(octyloxy)biphenyl

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About This Item

Linear Formula:
CH3(CH2)7OC6H4C6H4CN
CAS Number:
52364-73-5
Molecular Weight:
307.43
EC Number:
257-878-5
MDL number:
MFCD00075145
UNSPSC Code:
12352103
PubChem Substance ID:
24860561
NACRES:
NA.23

form

liquid crystal (nematic)

mp

51-77 °C (lit.)

SMILES string

CCCCCCCCOc1ccc(cc1)-c2ccc(cc2)C#N

InChI

1S/C21H25NO/c1-2-3-4-5-6-7-16-23-21-14-12-20(13-15-21)19-10-8-18(17-22)9-11-19/h8-15H,2-7,16H2,1H3

InChI key

GPGGNNIMKOVSAG-UHFFFAOYSA-N

General description

4′-octyl-4- biphenylcarbonitrile (8CB) is a low molar mass liquid crystal (LCs), which shows different liquid crystalline phases depending on temperature conditions. Under normal temperature conditions 8CB exists only as bulk smectic-A phase.[1] LCs are responsive to minor changes in temperature, shear, electric (or magnetic) fields, and the structure of solid surfaces with which they are in contact.[2]

Application

8CB may be used in the preparation of asymmetrical zinc phthalocyanine (aZnPc)-functional photocurable copolymer.[3]
Monolayer films of the LCs deposited onto highly ordered pyrolytic graphite, these self-assembled films display a wide variety of structural forms.[4]

Packaging

Bottomless glass bottle. Contents are inside inserted fused cone.

Hazard Statements

H413

Precautionary Statements

P273 - P501

Hazard Classifications

Aquatic Chronic 4

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

235.4 °F

Flash Point(C)

113 °C

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
BCCG5374
BCCD7814
BCBV7759
BCBT9028
BCBR7004V

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Preparation of a new polymer-dispersed liquid crystal film by using phthalocyanine-functional photocurable copolymer.
Mert H, et al.
Journal of Applied Polymer Science, 132(10) (2015)
Substrate defects and variations in interfacial ordering of monolayer molecular films on graphite.
Patrick DL, et al.
Langmuir, 10(1), 298-302 (1994)
Mechanism of molecular ordering in monolayer liquid crystal films.
Patrick DL, et al.
The Journal of Physical Chemistry, 100(20), 8478-8481 (1996)
Separation of nematic and smectic-A potential effects on solute ordering in a series of binary 6OCB-8OCB mixtures
Burnell EE, et al.
Canadian Journal of Chemistry, 89(7), 900-908 (2011)

Questions

  1. Give the phase transition temperatures and mention the different phases of liquid crystalline compound 338672 4'-(octyloxy)-4-biphenyl carbonitrile

    1 answer

    1. The phase transition temperatures for this compound have not been determined. See the link below to the PubChem file for this material. There are a number of references and physical properties listed that may be of interest:
      https://pubchem.ncbi.nlm.nih.gov/compound/104173

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