喹喔啉类衍生物与甲基噻吩共聚物的合成及性质

在二价镍配合物催化下,2,5-二溴-3-甲基噻吩格氏试剂与5,8-二溴-萘基喹喔啉和5,8-二溴-菲基喹喔啉共聚,得到相应的喹喔啉类共轭共聚物,收率分别为65%和68%。通过FT IR、1H-NM R对聚合物及中间体的结构进行了表征。聚合物的循环伏安图中,分别在0.66 V(Epa)/0.37 V(Epc)(Copo ly-m er I),0.78 V(Epa)/-0.06V(Epc)和1.26(Epa)/0.46(Epc)(Copo lym erⅡ)处观察到氧化还原峰,表明该类聚合物有电化学活性。在紫外-可见光谱中,分别在263 nm,323 nm处(Copo lym erⅠ)和299 nm,402 nm处(Copo lym erⅡ)出现吸收峰。所得聚合物分别在504 nm和513 nm处出现荧光最大发射峰。

Synthesis and properties of copolymers containing quinoxaline and methyl thiophene

Dehalogenative organometallic copolymerization of 5,8-dibromo acenaphthenequinoxaline and 5,8-dibromophenanthrenequinoxaline with 2,5-dibromo-3-methyl-thiophene utilizing a nickel(Ⅱ) complexes catalyzed afforded two new copolymers in 65% and 68% yields,respectively.The monomers and corresponding copolymers were characterized by FT-IR and()~1H-NMR.The results showed that the copolymers were the structure as expected.The Cyclic Voltamagram of the copolymers showed redox peaks at 0.66 V(E_(pa))/0.37 V(E_(pc))(CopolymerⅠ),0.78 V(E_(pa))/-0.06V(E_(pc)) and 1.26(E_(pa))/0.46(E_(pc))(CopolymerⅡ) indicating that the copolymers had electritrochemical activity.The UV-vis spectra of the copolymers exhibited maximum absorption peaks at 323 nm and 402 nm in DMF,respectively.Photoluminescence spectra of the copolymers have emitting peaks around 504 nm and 513 nm in DMF,respectively.