Читать книгу Handbook of Aggregation-Induced Emission, Volume 2 - Группа авторов - Страница 37

This chapter mainly introduces the research progress of the AIE properties and applications of AIE small molecules and macromolecules based on DSA. These AIE materials have weak or no luminescence in the solution, but in the aggregation state or solid state, their fluorescence increases significantly because the intramolecular vibrational motion annihilates the excitons in the solution state. While in the aggregation state, the distorted molecular configuration results in abundant intermolecular interaction, which limits the vibrational motion within the molecules, so that the molecules can effectively luminesce. On the other hand, the specific molecular packing also plays important roles in achieving enhanced fluorescence emission for these AIE molecules in the aggregation state. Due to the excellent luminescent properties of these AIE materials in aggregate or solid state, they have exhibited wide application prospects in the fields of response luminescence upon external stimulus, high solid luminescence organic materials, fluorescent bioimaging, fluorescent probes for chemical and biological sensing, and so on. The research on DSA and its derivatives enriches the AIE material system, broadens the application fields of AIE materials, and deepens the understanding of the mechanism of AIE luminescence. In the future work, we will combine the luminescent properties of AIEgens and self‐assembly together to develop self‐assembly‐based novel supramolecular luminescent systems with high efficiency. Through designing and synthesizing new AIE molecules and developing the novel methods and techniques of supramolecular assembly, we can realize the highly efficient luminescent ordered assembly with different size and morphology and investigate the relationship between the material structure and the luminescent properties, revealing the intrinsic photophysical mechanism of the ordered assembly. Subsequently, we will explore the applications of the supramolecular luminescent system based on AIEgens and self‐assembly in chemistry, material electronics, life science, and other important fields. These investigations will definitely provide a theoretical basis and practical evidence for the design and synthesis of new efficient luminescent materials and lay the foundations for expanding the function and application of AIE materials.