68579-71-5Relevant academic research and scientific papers
Magnetic copper ferrite catalyzed homo- and cross-coupling reaction of terminal alkynes under ambient atmosphere
Ma, Cui-Ting,Wang, Jiao-Jiao,Zhao, Ai-Dong,Wang, Qing-Li,Zhang, Zhan-Hui
, (2017/10/05)
The application of non-toxic and magnetically separable nano-CuFe2O4 as an efficient catalyst for oxidative homo- and cross-coupling reaction of terminal alkynes is described. A wide range of symmetrical and unsymmetrical 1,3-diynes have been synthesized in moderate to good yields under ambient atmosphere. The nano CuFe2O4 can be recovered with a magnet and reused at least five consecutive cycles with no appreciable loss of its catalytic activity.
Synthesis of diphenyl-diacetylene-based nematic liquid crystals and their high birefringence properties
Arakawa, Yuki,Nakajima, Shunpei,Ishige, Ryohei,Uchimura, Makoto,Kang, Sungmin,Konishi, Gen-Ichi,Watanabe, Junji
scheme or table, p. 8394 - 8398 (2012/07/28)
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.
Ordering of apolar and polar solutes in nematic solvents
Dingemans,Photinos,Samulski,Terzis,Wutz
, p. 7046 - 7061 (2007/10/03)
To illustrate the relative importance of electrostatic interactions, the LC-NMR data for a pair of polar and apolar solutes that are structural isomers, ortho- and para-dichlorobenzene, respectively, dissolved in polar and apolar nematogens were analyzed.
