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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Phase modulation of thermotropic liquid crystals of tetra-n-alkylammonium polyoxometalate ionic complexes
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Phase modulation of thermotropic liquid crystals of tetra-n-alkylammonium polyoxometalate ionic complexes

机译:四正烷基多金属氧酸盐离子络合物的热致液晶的相调制

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摘要

A series of composition analogous polyoxometalate-based ionic complexes are synthesized and studied, with a focus on the correlation between their mesomorphic behavior and their chemical structure. Generally, these polarizable rigid polyoxoanion clusters decorated with hydrophobic flexible alkyl chains have demonstrated a propensity to form thermotropic liquid-crystalline (LC) phases. Characterized by differential scanning calorimetry (DSC), polarized optical microscopy (PM), and X-ray diffraction (XRD), two of the four investigated complexes tend to form thermodynamically stable mesophases. Longer alkyl chains have been found to form mesophases, and the alkyl chain length of the quaternary ammonium cations influences both the occurrence and type of mesophase exhibited.
机译:合成和研究了一系列组成类似的基于多金属氧酸盐的离子配合物,着重研究了它们的介晶行为与其化学结构之间的相关性。通常,用疏水性柔性烷基链修饰的这些可极化的刚性聚氧阴离子簇已显示出形成热致液晶(LC)相的倾向。通过差示扫描量热法(DSC),偏振光学显微镜(PM)和X射线衍射(XRD)进行表征,四个研究的络合物中的两个趋于形成热力学稳定的中间相。已经发现更长的烷基链形成中间相,并且季铵阳离子的烷基链长度影响所显示的中间相的发生和类型。

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