中文摘要：

聚集诱导发光（ALE）材料吸引了许多光电器件和生物荧光技术领域的科学家的关注．对聚集诱导发光化合物构效关系的深入理解对于设计新材料至关重要．在本工作中，基于经典的AIE基元四苯基乙烯，设计并合成了一系列具有AIE性质，含不同电子给体／受体取代基的炔酮衍生物．对这一系列化合物的光物理性质进行了系统研究并分别探讨了取代基团对发光波长、发光效率和AIE性质的影响．它们的聚集态最大发射波长位于511～565nm，在四氢呋喃／水混合溶液中的荧光量子产率可达31％．在末端苯环上的电子给体／受体取代基团会降低聚集态的发光效率，而引入硝基取代基则会在发射波长红移的同时，显著猝灭荧光．最为重要的是，这些化合物结构中的炔酮基元可以在一系列金属离子中选择性地与Pd2＋配位，猝灭纳米聚集体的发光，并有望作为一个有效的pd2’荧光传感器．

英文摘要：

Organic luminescent materials with aggregation-induced emission （ALE） characteristics have attracted much attention among the scientists in the fields of optoelectronic devices and fluorescence biotechnology. AIE materials overcomes the aggregation-caused quenching problem of traditional organic fluorescent compounds, which possess high fluorescence quantum efficiency in the aggregated states. Thanks to the great research effort of worldwide scientists, a large variety of AIE materials have been developed and the underlying mechanism has been rapidly explored. The deep understanding of the structure-property relationship of AIE compounds is still in an urgent demand for the design of new materials. In this work, based on the classical propeller-shaped AIEgen, tetraphenylethene （TPE）, we designed and synthesized a series of electron donor/acceptor-containing alkynone derivatives with AIE feature such as cyano, nitro, butyl and butoxyl groups-substituted alkynone derivatives. Their chemical structures have been fully characterized by 1H NMR, 13C NMR, IR, and HRMS spectra, providing satisfactory analysis results. Their photophysical properties are systematically studied and the effect of substitution groups on the emission maximum, emission efficiency, as well as AIE property are discussed, respectively. Their emission maxima are located at 511 - 565 nm with the fluorescence quantum yields of up to 31% in the aggregated states in THF/water mixtures with high water content. The fluorescence intensity of the unsubstituted TPE-containing alkynone derivative in THF/H2O with φw=90% water content is 157 times higher than that in THF solution. It is suggested that both elec- tron-donating and electron-withdrawing substitution groups on the terminal phenyl ring decrease the emission efficiency of the aggregated state and the introduction of nitro group dramatically quenches the emission while redshifts the emission maximum. Most importantly, the alkynone groups in these compounds can selectively coordinate with Pd?