1374202-02-4

Basic information

• Product Name: 1,4-bis(4-heptyloxphenyl)buta-1,3-diyne
• CAS NO: 1374202-02-4
• Molecular Weight: 430.631
• Mol File: 1374202-02-4.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: 1,4-bis(4-heptyloxphenyl)buta-1,3-diyne(CAS DataBase Reference)
• NIST Chemistry Reference: 1,4-bis(4-heptyloxphenyl)buta-1,3-diyne(1374202-02-4)
• EPA Substance Registry System: 1,4-bis(4-heptyloxphenyl)buta-1,3-diyne(1374202-02-4)

Safety Data

• Hazardous Substances Data: 1374202-02-4(Hazardous Substances Data)

Upstream product

• 116223-56-4 (1-(heptyloxy)-4-iodobenzene) 
• 79887-18-6 1-ethynyl-4-(heptyloxy)benzene 
• 540-38-5 p-Iodophenol 
• 629-04-9 1-Bromoheptane 
• 229645-27-6 1-heptyloxy-4-[2-(trimethylsilyl)ethynyl]benzene 

Relevant articles and documents

Synthesis of diphenyl-diacetylene-based nematic liquid crystals and their high birefringence properties

We synthesized two series of diphenyl-diacetylene (DPDA)-based materials with alkoxy and alkyl tails of length m (DPDA-OCm and DPDA-Cm, respectively), and measured their nematic-phase birefringence (Δn) as a function of wavelength and temperature. We found that Δn decreases with an increase in m, possibly by a dilution effect of the low-Δn alkyl tail. Further, of the two series, Δn was found to be relatively higher in the DPDA-OCm materials, with the highest value of 0.4 obtained for DPDA-OC1 at 550 nm at 10 °C below the isotropic-to-nematic transition temperature. Further, we observed the temperature dependence for Δn, which is proportional to the order parameter (s). From extrapolation to s = 1 (the perfect orientation state), it is speculated that the DPDA-O moiety has the potential to afford a very large Δn of 0.9. The Royal Society of Chemistry 2012.