A controllable regioselective approach to achieve dipolar functionalization at the active sites (1,3-positions) and K-region (5,9-positions) of pyrene is demonstrated. Following this strategy, a set of dipolar 1,3-diphenyl-5,9-di(4-R-phenylethynyl)pyrenes were synthesized and systematically investigated by ¹H/¹³C NMR spectroscopy, X-ray crystallography, electronic spectra, as well as by theoretical calculations. By adjusting the substituents at the 5,9-positions of pyrene, the pyrene-based dipolar molecules 4 (H, F, OMe, CN, CHO, NMe₂) exhibit tunable optical properties with a wide emission band from blue (437 nm) to orange-red (571 nm).

证明了一种可控的区域选择性方法，可在of的活性位点（1,3-位）和K区（5,9-位）实现偶极功能化。按照这种策略，合成了一组偶极的1,3-二苯基-5,9-二（4-R-苯基乙炔基）吡啶，并通过¹ H / ¹³ C NMR光谱，X射线晶体学，电子光谱进行了系统研究。以及通过理论计算得出的结果。通过调节pyr的5,9-位上的取代基，the基偶极分子4（H，F，OMe，CN，CHO，NMe ₂）显示出可调的光学特性，并具有宽的蓝光发射带（437 nm）到橘红色（571 nm）。