Abstract：
Tuning the full-color emission of polymers holds significant promise. However, preparing unconventional luminescence polymers with color-tunability in dilute solution and understanding the relationship between non-covalent interactions and luminescent behavior remains a great challenge. We report two emitters (P1 and P2) incorporating tetracoordinate boron. The P1 with non-conjugated D-π-A structure, exhibited red delayed fluorescence at 645 nm with quantum yield of 9.15% in aggregates. Notably, the emission wavelength of P1 can be tuned from 418 to 588 nm at different solvent. Similarly, the emission wavelength of P2 can also be adjusted by manipulating the interactions between the solvent and fluorophore. Experimental characterization and theoretical calculations indicate that the B←N bond and electronic interactions between solvent and fluorophore significantly regulate the equilibrium the electrostatic potential (ESP) and the intramolecular O···O interactions of P1, thereby modulating its emission wavelength. Additionally, these polymers showed excellent potential in fluoride ions detection. This work provides new insights into the complex effects of intermolecular interactions on luminescent properties.
摘要：
调整聚合物的全色发射具有重要的前景。然而,在稀溶液中制备具有颜色可调性的非常规发光聚合物以及理解非共价相互作用与发光行为之间的关系仍然是一个巨大的挑战。我们报告了两个包含四配位硼的发射器（P1和P2）。具有非共轭D-π-A结构的P1,在645nm处表现出红色延迟荧光，聚集体的量子产率为9.15％。值得注意的是,P1的发射波长可以在不同的溶剂下从418到588nm。同样，也可以通过操纵溶剂和荧光团之间的相互作用来调节P2的发射波长。实验表征和理论计算表明，溶剂与荧光团之间的B-N键和电子相互作用显着调节了P1的静电势（ESP）和分子内O···O相互作用的平衡，从而调节了P1的发射波长。此外,这些聚合物在氟离子检测中显示出优异的潜力。这项工作为分子间相互作用对发光特性的复杂影响提供了新的见解。
