A new family of pyrimidyl-enolate-based bisboron complexes (DB1-3) with intense fluorescence in both solution and solid-state has been developed. Although these complexes have a propeller-shaped structure, DB1-3 showed intense fluorescence in the diluted solution because of the efficient steric hindrance induced by phenyl rings. As a result, a very weak AIE effect was observed in the tetrahydrofuran-water binary solvents. Moreover, these complexes displayed highly efficient solid-state fluorescence with high quantum yields ranging from 32 to 55%. The relationship between the excellent photophysical properties of these complexes and their propeller-shaped structure was rationalized by single-crystal X-ray analysis. Utilizing the advantages of highly emissive in both solution and solid-state and good hydrophobicity, DB1-3 can target lipid droplets in living HeLa cells, which may be used as novel scaffolds for developing fluorescent LDs probes for investigating the related pathological processes.

已经开发了一个新的基于嘧啶基-烯酸酯的双硼配合物（DB1-3），在溶液和固态中均具有强烈的荧光。尽管这些配合物具有螺旋桨状结构，但DB1-3由于苯环引起的有效位阻，在稀释溶液中显示出强烈的荧光。结果，在四氢呋喃-水二元溶剂中观察到非常弱的AIE作用。此外，这些络合物显示出高效的固态荧光，量子产率高，范围从32％到55％。这些配合物的优异光物理性质与其螺旋桨形结构之间的关系通过单晶X射线分析得到了合理化。利用在溶液和固态中均具有高发射率的优点以及良好的疏水性，DB1-3可以靶向活HeLa细胞中的脂质滴，可以用作研究荧光LDs探针以研究相关病理过程的新型支架。