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首页> 外文期刊>RSC Advances >Synthesis, characterization and nonlinear optical studies of novel blue-light emitting room temperature truxene discotic liquid crystals
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Synthesis, characterization and nonlinear optical studies of novel blue-light emitting room temperature truxene discotic liquid crystals

机译：新型发蓝光室温色丁烯盘状液晶的合成，表征及非线性光学研究

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A new series of discotic liquid crystals based on a truxene core has been synthesized to study the structure-property relationship in view of the self-assembling property and their linear and nonlinear optical properties. All these branched alkyl chain truxene derivatives show a mesogenic property in a columnar hexagonal fashion at room temperature which is studied by a combination of different techniques. The newly synthesized truxene discotic 7a possesses a clearing temperature of 117 degrees C, one of the lowest clearing temperatures known in truxene discotic liquid crystals. We have discovered that the introduction of branching near to the core even in a small alkyl chain drastically reduces the isotropic temperature. Due to their C-3 symmetry and their large first hyperpolarizability, these truxene derivatives show long-lived emissions in the solution state at room temperature. We also report large effective three-photon absorption in these materials under nanosecond laser pulse excitation at 532 nm, which makes them suitable candidates for optical limiting applications.
机译：基于自组装性质及其线性和非线性光学性质，合成了一系列新的基于萜烯核的盘状液晶，以研究其结构性质关系。所有这些支链烷基链茂金属衍生物在室温下以柱状六角形方式显示介晶性质，这是通过不同技术的组合来研究的。新合成的戊二烯盘状晶7a的清除温度为117摄氏度，这是戊烯盘状液晶中已知的最低清除温度之一。我们已经发现，即使在小的烷基链中，在核心附近引入支链也可以大大降低各向同性温度。由于它们的C-3对称性和较大的首次超极化性，这些tr烯衍生物在室温下在溶液状态下显示出长寿命的发射。我们还报告了在532 nm的纳秒激光脉冲激发下，这些材料具有较大的有效三光子吸收率，这使其非常适合用于光学限制应用。

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