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改变分子化学结构和调控分子结构聚集态行为从而影响或改变材料的化学和物理性质,是开发新型高效有机光电功能材料的重要手段.在共轭有机分子外缘引入烷基链一般是为了改进材料溶解性能,但近来的一些研究表明,烷基链长对一些共轭有机小分子固态聚集行为和光电性质具有重要影响,烷基链扮演着显著调控材料光电性质的“功能基团”作用.本文以聚集诱导发光(aggregation-induced emission,AIE)/聚集强化荧光(aggregation enhanced emission,AEE)发射共轭有机小分子为重点,对近年来有关烷基链长对共轭有机分子聚集形态和光电性质影响的一些典型事例进行评述,旨在使人们在进行共轭有机分子设计合成及其结构与性能关系研究中能够关注烷基链的因素,使烷基链变化作为功能导向晶态共轭有机材料设计合成及其可控制备的一种手段.
Altering the molecular chemical structure and regulating the aggregation behavior of the molecular structure, thus influencing or changing the chemical and physical properties of the material, is an important means to develop a novel and efficient organic optoelectronic functional material.Introducing an alkyl chain at the outer periphery of a conjugated organic molecule is generally to improve the material However, some recent studies have shown that the alkyl chain length has an important effect on the solid state aggregation and photoelectric properties of some conjugated organic small molecules. The alkyl chain plays a role of “functional group ” which significantly controls the photoelectric properties of the material In this paper, we focused on the emission of conjugated organic small molecules by aggregation-induced emission (AIE) / aggregation-enhanced emission (AEE) Some typical examples of the influence of optoelectronic properties are reviewed in order to make people pay attention to the factors of alkyl chain in the research on the design and synthesis of conjugated organic molecules and their relationship between structure and properties and make the change of alkyl chain as the function-oriented crystalline conjugate Design and synthesis of organic materials and its controllable preparation of a means.