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Perylene Bisimide-Based Luminescent Liquid Crystals with Tunable Solid-State Light Emission
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2021-11-25 , DOI: 10.1021/acsami.1c17280 Bin Mu 1 , Zhelin Zhang 1 , Xuhong Quan 1 , Xiangnan Hao 1 , Wei Tian 1
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2021-11-25 , DOI: 10.1021/acsami.1c17280 Bin Mu 1 , Zhelin Zhang 1 , Xuhong Quan 1 , Xiangnan Hao 1 , Wei Tian 1
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Perylene bisimides are among the most studied building blocks for supramolecular assemblies in the fabrication of optoelectronic devices for their exceptional optical and electronic properties; however, developing perylene bisimide-based luminescent liquid crystals remains a challenge for the strong π-stacking tendency of the large planar aromatic core to quench the emission. We here reported a novel strategy to achieve luminescent liquid crystals based on perylene bisimides by introducing a conformation-adjustable core to control the molecular stacking arrangement of planar perylene bisimides in the solid state. The emission wavelength is in the deep-red region with a luminescence efficiency of up to 10%. Fluorescence properties of the liquid crystals can be further regulated by photoisomerization-induced structural evolution from columnar to lamellar mesophases. These luminescent liquid crystals are also able to not only exhibit strong emission at high temperatures but also show attractive thermochromic luminescence tuning behaviors. This work provides a new strategy for the design and development of novel solid-state luminescent materials with potential for various optoelectronic applications.
中文翻译：
具有可调固态发光的苝双酰亚胺基发光液晶
由于其卓越的光学和电子特性，苝双酰亚胺是在光电器件制造中用于超分子组装的研究最多的构件之一；然而，开发基于苝双酰亚胺的发光液晶仍然是一个挑战，因为大的平面芳香核具有很强的 π 堆积趋势来淬灭发射。我们在这里报告了一种新策略，通过引入构象可调核来控制固态平面苝双酰亚胺的分子堆叠排列，从而实现基于苝双酰亚胺的发光液晶。发射波长在深红色区域，发光效率高达10%。液晶的荧光特性可以通过光异构化诱导的从柱状到层状中间相的结构演变来进一步调节。这些发光液晶不仅能够在高温下表现出强发射，而且还能够表现出有吸引力的热致变色发光调谐行为。这项工作为设计和开发具有各种光电应用潜力的新型固态发光材料提供了新的策略。
更新日期：2021-12-08
中文翻译：
具有可调固态发光的苝双酰亚胺基发光液晶
由于其卓越的光学和电子特性，苝双酰亚胺是在光电器件制造中用于超分子组装的研究最多的构件之一；然而，开发基于苝双酰亚胺的发光液晶仍然是一个挑战，因为大的平面芳香核具有很强的 π 堆积趋势来淬灭发射。我们在这里报告了一种新策略，通过引入构象可调核来控制固态平面苝双酰亚胺的分子堆叠排列，从而实现基于苝双酰亚胺的发光液晶。发射波长在深红色区域，发光效率高达10%。液晶的荧光特性可以通过光异构化诱导的从柱状到层状中间相的结构演变来进一步调节。这些发光液晶不仅能够在高温下表现出强发射，而且还能够表现出有吸引力的热致变色发光调谐行为。这项工作为设计和开发具有各种光电应用潜力的新型固态发光材料提供了新的策略。
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