膦酸盐
化学
环戊酮
发光
光化学
光致发光
分子内力
发色团
磷光
荧光
位阻效应
环己酮
荧光团
高分子化学
有机化学
催化作用
材料科学
物理
量子力学
光电子学
作者
Zhihui Yang,Jinyun Yang,Haobo Shi,Fanghao Sun,Yue Zhang,Yuanrong Wang,Jiaqi Qin,Pei‐Zhou Li,Haifeng Lu
标识
DOI:10.1002/asia.202401140
摘要
Phosphonate compounds have been proposed as atypical chromophores, but their luminescence properties, especially in combination with flexible aliphatic chains, remain underexplored. In this study, we have synthesized a series of novel siloxane‐containing phosphonate esters as organofluorophores through a catalyst‐free, one‐pot Kabachnik‐Fields (K‐F) reaction. This reaction involved acetone, cyclohexanone, or cyclopentanone, with siloxanes containing aliphatic amines and phosphonate diesters as reactants. The resulting compounds exhibit blue fluorescence. Fluorescence tests confirmed that all synthesized materials display aggregation‐induced emission (AIE) phenomena, with some also exhibiting upconversion. Notably, the luminescence intensity can be modulated by altering the steric hindrance near the phosphonate ester group. Mechanistic studies indicate that the strong blue photoluminescence observed in the aggregated state results from restricted intramolecular motion (RIM) and spatial electronic delocalization. These findings demonstrate that even simple phosphonates, when combined with flexible aliphatic chains, can exhibit significant AIE luminescence properties.
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