N-[4-(2-Methoxyphenoxy)]phenyl acetanilide has been synthesized and its structure was determined by X-ray diffraction analysis with a=0.6152(4),b=1.1728(4),c=1.2367(4)nm,α=91.34(3),β=93.22(4),γ=102.61(3)°,V=0.8688(7)nm^3 and D_c=1.274 Mg/m^3.Theoretical investigations on the title compound were carried out by full optimization on its structural unit at the B3LYP/6-31G** level.And ultimately,the infrared,Raman spectra,electronic absorption spectra, and the relationships between temperature and thermodynamic functions(H_m,S_m,C_(pm))were obtained.
A series of disk-rod-disk liquid crystal trimers were synthesized.CuI-NEt3 catalyzed alkyne azide cycloaddition in toluene at room temperature connected two triphenylene discogens to a biphenyl rod-shaped mesogen.The trimers were characterized by using 1H NMR,IR,and high resolution mass spectrometry.The mesomorphic properties were investigated using polarized optical microscopy(POM) ,differential scanning calorimetry(DSC) ,and wide-angle X-ray diffraction.The results showed that the trimers exhibited rectangular columnar mesophase(Colr) .The length of the flexible spacer connecting the three segments has prominent influence on the phase transition temperatures of the trimers.
Yu, WenHao Nie, ShiChang Bai, YueFeng Jing, Yang Wang, BiQin Hu, Ping Zhao, KeQing
