A 1,6-Diphenylpyrene-Based, Photoluminescent Cyclophane Showing a Nematic Liquid-Crystalline Phase at Room Temperature
A 1,6-Diphenylpyrene-Based, Photoluminescent Cyclophane Showing a Nematic Liquid-Crystalline Phase at Room Temperature
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DOI：
10.3390/cryst9020092
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发表时间：
2019-02
期刊：
影响因子：
2.7
通讯作者：
Yoshimitsu Sagara;Tatsuya Muramatsu;N. Tamaoki
中科院分区：
文献类型：
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作者：
Yoshimitsu Sagara;Tatsuya Muramatsu;N. Tamaoki
光致发光向列型液晶由于其在光电器件中的潜在应用，几十年来一直是一个吸引人的研究目标。将发光模体集成到环状结构中是一种很有前途的诱导低序液晶相的方法，即使使用相对较大和刚性的发光体作为发光体。在这里，我们展示了一种基于1，6-二苯基芘的不对称环番化合物，在室温下显示出稳定的向列相，并从凝聚态显示出强烈的光致发光。观察到的天蓝色光致发光主要是由被归因于组装的发光体而不是单体的发射物种所决定的。
Photoluminescent nematic liquid crystals have been an attractive research target for decades, because of their potential applications in optoelectrical devices. Integration of luminescent motifs into cyclic structures is a promising approach to induce low-ordered liquid-crystalline phases, even though relatively large and rigid luminophores are used as emitters. Here, we demonstrate a 1,6-diphenylpyrene-based, unsymmetric cyclophane showing a stable nematic phase at room temperature and exhibiting strong photoluminescence from the condensed state. The observed sky-blue photoluminescence was dominated by the emission species ascribed to assembled luminophores rather than monomers.