聚(3-癸基噻吩)-co-聚(3-溴噻吩)的合成与荧光性能研究

Synthesis and photoluminescence property of poly(3-decylthiophene-co-3-bromothiophene)

为了研究溴取代基对聚噻吩衍生物荧光性能的影响,定量调控聚噻吩衍生物的光学性能,用化学氧化法制备了聚(3-癸基噻吩)-co-聚(3-溴噻吩)(P3DT-co-P3BrT)。用红外光谱、核磁共振、X-射线衍射和透射电镜等对产物进行表征,用紫外-可见吸收光谱和荧光分析等方法研究了P3DT-co-P3BrT的光学性能。研究表明,P3DT-coP3BrT的带宽较宽,噻吩环上的溴取代基对P3DT-co-P3BrT的荧光强度和量子产率有明显影响。随着P3BrT含量的提高,P3DT-co-P3BrT的荧光蓝移,这与溴的吸电子诱导效应和基于结构的D-π-A效应有关。

In order to study the effect of bromine substituents on the fluorescence properties of polythiophene derivatives and quantitatively tuned the optical properties of polythiophene derivatives,polythiophene(3-decyl thiophene)-co-poly(3-bromothiophene)(P3DT-co-P3BrT)was prepared by chemical oxidation method.The products were characterized by infrared(FT-IR),nuclear magnetic(NMR),X-ray diffraction(XRD)and transmission electron microscope(TEM).The optical properties of P3DT-co-P3BrT were studied by UV-Vis and photoluminescence(PL).The results showed that the bandwidth of P3DT-co-P3BrT was wider,and the bromine substituents on the thiophene ring had a significant effect on the fluorescence intensity and quantum yield of P3DT-co-P3BrT.With the increase of P3BrT content,the fluorescence blue shift of P3DT-co-P3BrT was related to the electron absorption induction effect of bromine and the structure-based D-π-A effect.