Synthesis and tunable chiroptical properties of chiral BODIPY-based D–π–A conjugated polymers
作者:Xiao Ma、Eman Abdel Azeem、Xiaolin Liu、Yixiang Cheng、Chengjian Zhu
DOI:10.1039/c3tc32029d
日期:——
structures, the three chiral BODIPY-based conjugated polymers can exhibit a red fluorescent emission centered at around 624–650 nm, with tunable band gaps in the range 1.56–1.96 eV, respectively. Interestingly, compared with the anisotropy (r = 0.005) and the CPL dissymmetry factor (glum < 0.01) of the chiral BODIPY small molecule as the counterpart, the three chiral polymers can exhibit a high r (up
可以用具有2,7-二乙炔基-的二碘取代的手性硼-二吡咯亚甲基(BODIPY)衍生物(M-1)合成三种新型的供体-π-受体(D-π-A)型手性聚合物P1,P2和P3。 9,9-二辛基9 ħ芴(M-2 ),3,6-二乙炔基-9-辛基- 9 ħ咔唑(M-3 ),和3,7-二乙炔基10十二烷基10 ħ -吩噻嗪(M-4)通过Pd催化的Sonogashira偶联反应。从三种不同的供体结构中选择,三种基于手性BODIPY的共轭聚合物可以显示红色荧光发射,中心波长在624-650 nm左右,可调节的带隙分别在1.56-1.96 eV的范围内。有趣的是,与手性BODIPY小分子的各向异性(r = 0.005)和CPL不对称因子(g lum <0.01)相比,这三种手性聚合物可以表现出较高的r(P1最高为0.10 )和a。大摹LUM(高达0.32 P2),这可归因于链间π–π堆积效应以及沿这些聚合物主链的明确手性排列。