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New fluorescent columnar mesogens derived from phenanthrene–cyanopyridone hybrids for OLED applications†
Materials Chemistry Frontiers ( IF 6.0 ) Pub Date : 2018-10-08 00:00:00 , DOI: 10.1039/c8qm00377g D. R. Vinayakumara 1, 2, 3, 4, 5 , Hidayath Ulla 2, 5, 6, 7 , Sandeep Kumar 5, 8, 9, 10 , M. N. Satyanarayan 3, 4, 5, 11 , Airody Vasudeva Adhikari 1, 2, 3, 4, 5
Materials Chemistry Frontiers ( IF 6.0 ) Pub Date : 2018-10-08 00:00:00 , DOI: 10.1039/c8qm00377g D. R. Vinayakumara 1, 2, 3, 4, 5 , Hidayath Ulla 2, 5, 6, 7 , Sandeep Kumar 5, 8, 9, 10 , M. N. Satyanarayan 3, 4, 5, 11 , Airody Vasudeva Adhikari 1, 2, 3, 4, 5
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We report the design, synthesis, and self-assembly of a novel series of pseudodiscoid dyads comprising electron-rich dialkoxyphenanthrene and trialkoxyphenyl rings appended to an electron-deficient cyanopyridone core. Evidently, all the members of the series exhibited bi-mesophases with prospective columnar mesomorphism; moreover, it was steady under ambient conditions. The electro-optical studies revealed that the new liquid crystalline materials were efficient green light emitters both in solution and LC states with substantial chromaticity. Further, their theoretical studies (DFT) revealed that the molecules possess good intramolecular charge transport behavior. These superior properties of the LC materials render them to become promising candidates for OLED applications. Their electroluminescence competence was studied by fabricating doped and non-doped simple-architecture OLED devices. One of the doped devices with Py-2 as the emissive layer exhibits the highest deep-green electroluminescence with a brightness of 1898 cd m−2 at 4.23 V having CIE coordinates of (0.312, 0.606).
中文翻译：
来自菲-氰基吡啶酮杂化物的新型荧光柱状液晶元，用于OLED应用†
我们报告设计，合成和自组装的新型系列的伪discoads dyads，包括附加到缺电子的氰基吡啶酮核心的富含电子的二烷氧基菲和三烷氧基苯环。显然，该系列的所有成员均表现出双中相，具有预期的柱状同构。此外，在环境条件下稳定。电光研究表明，新的液晶材料在溶液状态和LC状态下都是有效的绿色发光体，具有相当大的色度。此外，他们的理论研究（DFT）表明分子具有良好的分子内电荷传输行为。LC材料的这些优越性能使其成为OLED应用的有前途的候选者。通过制造掺杂和非掺杂的简单结构OLED器件研究了它们的电致发光能力。其中一种掺杂设备作为发射层的Py-2表现出最高的深绿色电致发光，在4.23V下的亮度为1898cdm -2，CIE坐标为（0.312，0.606）。
更新日期：2018-10-08
中文翻译：
来自菲-氰基吡啶酮杂化物的新型荧光柱状液晶元，用于OLED应用†
我们报告设计，合成和自组装的新型系列的伪discoads dyads，包括附加到缺电子的氰基吡啶酮核心的富含电子的二烷氧基菲和三烷氧基苯环。显然，该系列的所有成员均表现出双中相，具有预期的柱状同构。此外，在环境条件下稳定。电光研究表明，新的液晶材料在溶液状态和LC状态下都是有效的绿色发光体，具有相当大的色度。此外，他们的理论研究（DFT）表明分子具有良好的分子内电荷传输行为。LC材料的这些优越性能使其成为OLED应用的有前途的候选者。通过制造掺杂和非掺杂的简单结构OLED器件研究了它们的电致发光能力。其中一种掺杂设备作为发射层的Py-2表现出最高的深绿色电致发光，在4.23V下的亮度为1898cdm -2，CIE坐标为（0.312，0.606）。
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