Two series of copper(I) complexes (1, 2) derived from bis2-[3′-(3″,4″-dialkoxyphenyl)-5′-methyl-1′-pyrazolyl]ethyl} ethers and from bis2-[3′-(3″,4″,5′-trialkoxyphenyl)-5′-methyl-1′-pyrazolyl]ethyl} ethers were prepared and characterized. These ionic copper(I) complexes were obtained by reaction of the ethers with [Cu(MeCN)4]BF4 in refluxing acetonitrile. All three-coordinated copper(I) complexes isolated as off-white solids were characterized by NMR spectroscopy and elemental analysis, and their mesomorphic properties were also studied by polarized optical microscopy, differential scanning calorimetry (DSC) and powder X-ray diffraction (XRD). Results indicated that these complexes exhibited hexagonal columnar phases (Colh). The clearing points of all compounds were relatively low (94–112 °C) and the temperature range of the mesophases was ca. 45–68 °C. Powder XRD diffraction patterns showed three sharp reflections in the small angle region corresponding to a ratio of their positions of 1 : (1/3)1/2 ∶ (1/2), indicating typical hexagonal columnar phases.
两系列
铜(I)配合物(1,2)源自双2-[3′-(3″,4″-二烷氧基苯基)-5′-甲基-1′-
吡唑基]乙基}醚和双2-[3′-(3″,4″,5′-三烷氧基苯基)-5′-甲基-1′-
吡唑基]乙基}醚,被制备并表征。这些离子型
铜(I)配合物通过醚与[Cu(MeCN)4]BF4在回流
乙腈中反应获得。所有分离为米
白色固体的三配位
铜(I)配合物均通过核磁共振光谱和元素分析进行表征,其介晶性质也通过偏光显微镜、差示扫描量热法(
DSC)和粉末X射线衍射(XRD)进行研究。结果表明,这些配合物展现出六角柱状相(Colh)。所有化合物的熔点相对较低(94–112 °C),介相温度范围约为45–68 °C。粉末XRD衍射图谱显示在小角度区域有三个尖锐的反射,其位置比为1 : (1/3)1/2 ∶ (1/2),表明典型的六角柱状相。