新型主链含方酸菁的低能隙烷基芴共聚物的合成及性质

Synthesis and Properties of Novel Low Band-Gap Polyfluorene Copolymers Containing Squaraines in the Backbone

用微波法快速地合成了单体方酸菁染料,并首次通过Suzuki偶联将其键合到聚芴的主链上,目标共聚物通过红外和核磁对其进行了表征。聚合物P1和P2的热分解温度分别为465.3℃和423.2℃,玻璃化温度分别为183.4℃和142.6℃,具有良好的热稳定性和加工性能。该类材料对太阳光的吸收在300nm^900 nm范围,覆盖了整个可见光区域和部分红外区域,电化学分析表明其具有1.46 eV和1.52 eV的低能隙。

In this paper, a convenient synthetic method for squaraine monomer under microwave irradiation was describe. And novel polyfluorenes containing squaraines unit were prepared by method of Suzuki coupling reaction. The result polymers were characterized by FT-IR and NMR. The polymers possess satisfactory thermal stability with thermal decomposition tem- perature （Td） of 465.3 ℃ and 423.2 ℃ and glass-transltion temperature （T8） of 183. 4 ℃ and 142. 6 ℃, respectively. The materials perform a good absorption around about 300 nm^900 nm covering the visible and infrared spectrum, and the polymers exhibit a correspondingly low optical band gap of 1.94 and 1.86 eV determined by electrochemical analysis.