Pressure-Induced Blue-Shifted and Enhanced Emission: A Cooper-ative Effect between Aggregation-Induced Emission and Energy-Transfer Suppression,Journal of the American Chemical Society

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Pressure-Induced Blue-Shifted and Enhanced Emission: A Cooper-ative Effect between Aggregation-Induced Emission and Energy-Transfer Suppression
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2020-01-10 , DOI: 10.1021/jacs.9b11080
Haichao Liu ₁ , Yarong Gu _{2,

3} , Yuxiang Dai ₄ , Kai Wang ₂ , Shitong Zhang ₁ , Gang Chen ₁ , Bo Zou ₂ , Bing Yang ₁

Affiliation

Most organic piezochromic materials exhibit red-shifted and quenched emission as pressure increases. However, an ab-normal phenomenon of pressure-induced blue-shifted and enhanced emission is observed in a 9-(3-(1,2,2-triphenylvinyl)phenyl)anthracene crystal, which is based on discrete π-π anthracene (AN) dimer stacking with tetra-phenyl ethylene (TPE) as a spacer. A blue-shifted emission appears and strengthens when pressure is more than 1.23 GPa, and it reaches the maximum when pressure is 4.28 GPa. This phenomenon is ascribed to the cooperative effect be-tween the aggregation-induced emission of TPE units and energy-transfer suppression from TPE to an AN excimer. This work reports a new concept in the piezochromic field and provides a novel strategy to achieve luminescence from a high-lying excited state.

中文翻译：

压力引起的蓝移和增强发射：聚集引起的发射和能量转移抑制之间的协同效应

大多数有机压致变色材料随着压力的增加表现出红移和猝灭发射。然而，在基于离散π-π蒽的9-(3-(1,2,2-三苯基乙烯基)苯基)蒽晶体中观察到压力引起的蓝移和增强发射的异常现象( AN) 以四苯基乙烯 (TPE) 作为间隔物的二聚体堆叠。压力大于1.23 GPa时出现蓝移发射并增强，压力为4.28 GPa时达到最大值。这种现象归因于 TPE 单元的聚集诱导发射和从 TPE 到 AN 准分子的能量转移抑制之间的协同效应。这项工作报告了压致变色领域的一个新概念，并提供了一种从高位激发态实现发光的新策略。

更新日期：2020-01-10

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