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About: 4-Cyano-4'-pentylbiphenyl     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : umbel-rc:ChemicalSubstanceType, within Data Space : dbpedia.org associated with source document(s)

Type: Thingdul:ChemicalObjectchemical substanceChemical compoundyago:WikicatLiquidCrystalDisplaysyago:Artifact100021939yago:Device103183080yago:DigitalDisplay103196598yago:Display103211117yago:ElectronicDevice103277771yago:Instrumentality103575240yago:LiquidCrystalDisplay103676759yago:Object100002684yago:PhysicalEntity100001930chemical compoundyago:Whole100003553umbel-rc:ChemicalSubstanceType New Facet based on Instances of this Class

4-Cyano-4'-pentylbiphenyl is a commonly used nematic liquid crystal with the chemical formula C18H19N. It frequently goes by the common name 5CB. 5CB was first synthesized by George William Gray, Ken Harrison, and J.A. Nash at the University of Hull in 1972 and at the time it was the first member of the cyanobiphenyls. The liquid crystal was discovered after Gray's group received a grant from the UK Ministry of Defence to find a liquid crystal that had liquid crystal phases near room temperature with the specific intention of using them in liquid crystal displays. The molecule is about 20 Å long. The liquid crystal 5CB undergoes a phase transition from a crystalline state to a nematic state at 22.5 °C and it goes from a nematic to an isotropic state at 35.0 °C.