基于3,4-乙撑二氧噻吩-亚乙烯基的杂化型电致变色聚合物的合成与表征

Preparation and characterization of EDOT-vinylene-based hybrid electrochromic polymer

合成了2个基于EDOT-vinylene(3,4-乙撑二氧噻吩-亚乙烯基)的杂化型新单体BEDOT-V-F[双(3,4-乙撑二氧噻吩亚乙烯基)呋喃]和BEDOT-V-T[双(3,4-乙撑二氧噻吩亚乙烯基)噻吩]。分别对这2种材料进行电化学、光谱电化学、动力学和表面形貌的表征,考查了它们的电致变色性质。结果表明PBEDOT-V-F和PBEDOT-V-T具有非常低的初始氧化电位、良好的电化学稳定性和较低的带隙值,它们在近红外区的光对比度分别为31.5%(950nm)和36.7%(980nm),且都具有在蓝色和透过态之间可逆变化的电致变色能力,因此在近红外光学器件领域具有潜在的应用价值。

Two novel EDOT-vinylene-based monomers BEDOT-V-F and BEDOT-V-T were synthesized and the corresponding polymer were characterized by electrochemistry,spectroelectrochemistry,kinetics and SEM.Their electrochromic properties were investigated.The results showed that PBEDOT-V-F and PBEDOT-V-T had very low onset oxidation potentials,good electrochemical stabilities and low band gaps.PBEDOT-V-F and PBEDOT-V-T films displaied the optical contrasts of 31.5%（950nm）and 36.7%（980nm）,respectively,and can be switched between blue and transmissive states,which was promising in the application of near-infrared optical devices.