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首页> 外文期刊>Chemistry: A European journal >Self-Assembly in Helical Columnar Mesophases and Luminescence of Chiral 1H-Pyrazoles
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Self-Assembly in Helical Columnar Mesophases and Luminescence of Chiral 1H-Pyrazoles

机译：螺旋柱状中间相的自组装和手性1H-吡唑的发光

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摘要

Chiral polycatenar 1H-pyrazoles self-assemble to form columnar mesophases that are stable at room temperature. X-ray diffraction and CD studies in the mesophase indicate a supramolecular helical organization consisting of stacked H-bonded dimers. The liquid-crystalline compounds reported are 3,5-bis(dialkoxyphenyl)-1Hpyrazoles that incorporate two or four dihydrocitronellyl chiral tails. It can be observed that the grafting of these branched chiral substituents onto the 3,5-diphenyl-1H-pyrazole core has a beneficial role in inducing mesomorphism, because isomeric linear-chain compounds are not liquid crystalline; this is not the usual scheme of behavior. Furthermore, the molecular chirality is transferred to the columnar mesophase, because preferential helical arrangements are observed. Films of the compounds are luminescent at room temperature and constitute an example of the self-organization of nondiscoid units into columnar liquid-crystalline assemblies in which the functional molecular unit transfers its roperties to a hierarchically built superstructure.
机译：手性聚类别1H-吡唑自组装形成在室温下稳定的柱状中间相。中间相的X射线衍射和CD研究表明，由堆叠的H键合二聚体组成的超分子螺旋组织。所报道的液晶化合物是3，5-双（二烷氧基苯基）-1H并吡唑，其结合有两个或四个二氢香茅烷基手性尾巴。可以观察到，这些支化的手性取代基在3，5-二苯基-1H-吡唑核上的接枝具有诱导介晶性的有益作用，因为同分异构的线性链化合物不是液晶。这不是通常的行为方案。此外，由于观察到优先的螺旋排列，分子手性转移到柱状中间相。该化合物的薄膜在室温下是发光的，构成了非粘性单元自组织成柱状液晶组件的一个例子，在柱状液晶组件中，功能分子单元将其索状转移到分层构建的上部结构中。

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