作者:G. Shanker、M. Prehm、C. V. Yelamaggad、C. Tschierske
DOI:10.1039/c0jm04301j
日期:——
We report on the synthesis and investigation of self-assembly properties of new benzylidenehydrazine based compounds, namely N-(2,3,4-tridodecyloxybenzylidene)-3,4,5-N′-trialkoxybenzoylhydrazines. They were confirmed to exhibit wide ranges of room temperature hexagonal columnar liquid crystalline phases (Colh) as evidenced by optical polarizing microscope (OPM), differential scanning calorimetry (DSC) and X-ray diffraction (XRD) studies. Helical organization was confirmed for the Colh* phase of a compound with chiral tails. More generally, combining the 2,3,4- and 3,4,5-substitution patterns of aromatic cores in one molecule provides a new way to low melting columnar LC materials with wide phase ranges.
我们报道了基于苄叉缩氨基脲的新化合物,即N-(2,3,4-三十二烷氧基苄叉)-3,4,5-N′-三烷氧基苯甲酰肼的自组装性质的合成与研究。通过光学偏光显微镜(OPM)、差示扫描量热法(DSC)和X射线衍射(XRD)研究证实,它们表现出广泛的室温六方柱状液晶相(Colh)。对于具有手性尾链的化合物,其Colh*相的螺旋结构得到了确认。更广泛地说,将2,3,4-和3,4,5-取代模式的芳香核结合在一个分子中,为制备具有广泛相区范围的低熔点柱状液晶材料提供了一种新方法。