Guangxi Key Laboratory of Electrochemical and Magnetochemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin, Guangxi 541004, PR China.
Guangxi Key Laboratory of Electrochemical and Magnetochemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin, Guangxi 541004, PR China.
Spectrochim Acta A Mol Biomol Spectrosc. 2020 Mar 5;228:117794. doi: 10.1016/j.saa.2019.117794. Epub 2019 Nov 13.
Red material is widely used in many fields because it has a lot of high performances such as strong penetrability, little trauma to cell and tissue, easy to prepare, and low background interference. However, a lot of organic materials were troubled with the aggregation caused emission quenching (ACQ) effect, which really limits their practical applications. In contrast, aggregation induced emission (AIE) and aggregation-induced enhanced emission (AIEE) effects provide an efficient method to break the obstacle of ACQ effect. Herein, a red light molecule was developed by integrating cyano and alkyl sulfide moieties. Its photoluminescence mechanism was further revealed by fluorescence spectrum, density functional theory (DFT) and X-ray single crystal diffraction, respectively. It is found that this compound has good planar construction and has no rotatory unit, it showed typical AIEE performance because of intramolecular D-π-A structure and the formation of J-aggregation. This molecular design principle may be able to offer an effective strategy to exploit red AIE/AIEE organic materials. Meanwhile, this fluorogen showed excellent response capability to ClO including high selectivity and sensitivity, and cell imaging performance.
红色材料由于具有很强的穿透性、对细胞和组织的创伤小、易于制备、背景干扰低等优点，被广泛应用于许多领域。然而，许多有机材料受到聚集导致发射猝灭（ACQ）效应的困扰，这确实限制了它们的实际应用。相比之下，聚集诱导发光（AIE）和聚集诱导增强发射（AIEE）效应为克服 ACQ 效应提供了一种有效的方法。在此，通过整合氰基和烷基硫醚部分，开发了一种红光分子。通过荧光光谱、密度泛函理论（DFT）和 X 射线单晶衍射分别进一步揭示了其光致发光机理。结果发现，该化合物具有良好的平面结构，没有旋转单元，由于其具有分子内 D-π-A 结构和 J-聚集的形成，表现出典型的 AIEE 性能。这种分子设计原理可能为开发红色 AIE/AIEE 有机材料提供一种有效的策略。同时，这种荧光团对 ClO 具有优异的响应能力，包括高选择性和灵敏度，以及细胞成像性能。
