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338680

Sigma-Aldrich

4′-Octyl-4-biphenylcarbonitrile

liquid crystal (nematic), 98%

Synonym(s):

4′-n -Octyl-4-cyanobiphenyl, 4′-Octyl-4-biphenylcarbonitrile, 4′-Octyl-4-cyanobiphenyl, 4′-Octyl[1,1′-biphenyl]-4-carbonitrile, 4-n -Octyl-4′-cyanobiphenyl, 4-Cyano-4′-n -octylbiphenyl, 4-Cyano-4′-octyl-1,1′-biphenyl, 4-Cyano-4′-octylbiphenyl, 4-Octyl-4′-cyanobiphenyl, p -n -Octyl-p ′-cyanobiphenyl, p -Cyano-p ′-octylbiphenyl, p -Octyl-p ′-cyanobiphenyl

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About This Item

Linear Formula:
CH3(CH2)7C6H4C6H4CN
CAS Number:
52709-84-9
Molecular Weight:
291.43
EC Number:
258-120-6
MDL number:
MFCD00075146
UNSPSC Code:
12352103
PubChem Substance ID:
24860562
NACRES:
NA.23

Quality Level

100

assay

98%

form

liquid crystal (nematic)

SMILES string

CCCCCCCCc1ccc(cc1)-c2ccc(cc2)C#N

InChI

1S/C21H25N/c1-2-3-4-5-6-7-8-18-9-13-20(14-10-18)21-15-11-19(17-22)12-16-21/h9-16H,2-8H2,1H3

InChI key

CSQPODPWWMOTIY-UHFFFAOYSA-N

General description

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

Application

Monolayer films of the LCs deposited onto highly ordered pyrolytic graphite, these self-assembled films display a wide variety of structural forms.

pictograms

Exclamation mark
GHS07

signalword

Warning

Hazard Classifications

Acute Tox. 4 Dermal - Acute Tox. 4 Inhalation - Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 3

target_organs

Respiratory system

Storage Class

10 - Combustible liquids

wgk_germany

WGK 3

flash_point_f

235.4 °F - closed cup

flash_point_c

113 °C - closed cup

ppe

Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter

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Certificates of Analysis (COA)

Lot/Batch Number
STBK5373
STBJ1731
STBG8551
STBG4807V
STBF8460V

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Monirosadat Sadati et al.
Journal of the American Chemical Society, 139(10), 3841-3850 (2017-02-09)
Numerous applications of liquid crystals rely on control of molecular orientation at an interface. However, little is known about the precise molecular structure of such interfaces. In this work, synchrotron X-ray reflectivity measurements, accompanied by large-scale atomistic molecular dynamics simulations
Mechanism of molecular ordering in monolayer liquid crystal films.
Patrick DL, et al.
The Journal of Physical Chemistry, 100(20), 8478-8481 (1996)
Substrate defects and variations in interfacial ordering of monolayer molecular films on graphite.
Patrick DL, et al.
Langmuir, 10(1), 298-302 (1994)
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)

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