Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China.
Shandong Key Laboratory of Optical Communication Science and Technology, School of Physical Science and Information Technology of Liaocheng University, Liaocheng 252059, China.
J Phys Chem Lett. 2022 Jan 13;13(1):136-141. doi: 10.1021/acs.jpclett.1c03745. Epub 2021 Dec 28.
Increasing aggregation induced emission (AIE) efficiency is of fundamental interest as it directly reflects performance of multitwist-based luminogens in bioimaging and in the photoelectric device field. However, an effective and convenient methodology to increase AIE efficiency significantly remains a challenge. Here, we present a general strategy to increase AIE efficiency of multitwist-based luminogens by pressure, resulting in a 120.1-fold enhancement of the AIE intensity of tris[4-(diethylamino)phenyl]amine (TDAPA) under high pressure compared to that of the traditional method. AIE efficiency of TDAPA increases from 0.5% to 46.1% during compression. Experimental and theoretical investigations reveal that the AIE efficiency enhancement originates from intramolecular vibration and the twisted intramolecular charge transfer are suppressed under high pressure. High AIE efficiency under high pressure provides an important inspiration for improving performance of multitwist-based luminogens in the lighting and biomedical fields.
提高聚集诱导发光（AIE）效率具有重要意义，因为它直接反映了基于多螺旋的发光体在生物成像和光电设备领域的性能。然而，如何有效地提高 AIE 效率仍然是一个挑战。在这里，我们提出了一种通过压力来提高基于多螺旋的发光体的 AIE 效率的通用策略，使得三[4-（二乙氨基）苯基]胺（TDAPA）的 AIE 强度在高压下相对于传统方法提高了 120.1 倍。在压缩过程中，TDAPA 的 AIE 效率从 0.5%增加到 46.1%。实验和理论研究表明，AIE 效率的提高源于分子内振动，而在高压下扭曲的分子内电荷转移受到抑制。高压下的高 AIE 效率为提高基于多螺旋的发光体在照明和生物医学领域的性能提供了重要启示。
