应用化学2018，Vol.35Issue(2)：165-173,9.DOI:10.11944/j.issn.1000-0518.2018.02.170045
基于吡咯并吡咯二酮和苯并噻二唑聚合物的合成及其近红外电致变色性能
Synthesis and Properties of Near-Infrared Electrochromic Polymers Containing Diketopyrrolopyrrole, Benzothiadiazole and Thiophene
摘要
Abstract
Donor-acceptor type polymers are new electrochromic materials which are tunable and colorfull. However,the electrochromic properties such as optical contrast and stability need to be further improved.Low band gap conjugated polymers containing diketopyrrolopyrrole(DPP), benzothiadiazole(BTZ)and thiophen (T)were synthesized and their electrochromic properties were studied.Four polymers P1~P4 were obtained by adjusting the molar ratio of the three monomers(n(DPP):n(BTZ):n(T)=1:0:1,1.5:0.5:1,2:1:1 and 3:2:1, respectively).The absorption and electrochromic properties of the polymers depend on the ratios of DPP,BTZ and T units in the polymers.It was found that these polymers have high optical contrast(ΔT:50%~60%)and coloration efficiency(CE:300~600 cm2/C)in the near-infrared region.In particular,ΔT of polymer P3 reached the high value of 63% and CE of polymer P4 was 471 cm2/C at 1550 nm.The polymers containing BTZ groups have higher optical contrast at both the near-infrared(NIR)region and the maximum absorption wavelength than that of polymer P1 in which the BTZ content is zero.Polymers containing BTZ unit shows better electrochromic stability, which is attributed to its higher oxidation potential and better electrochemical stability.It provides a new way to design high-performance electrochromic polymers.关键词
电致变色/给-受体型聚合物/光谱电化学/对比度/变色效率/稳定性Key words
electrochromism/donor-acceptor type polymers/spectroelectrochemistry/optical contrast/coloration efficiency/stability分类
化学化工引用本文复制引用
陈秀红,胡六永,乔文强,王植源..基于吡咯并吡咯二酮和苯并噻二唑聚合物的合成及其近红外电致变色性能[J].应用化学,2018,35(2):165-173,9.基金项目
国家自然科学基金(21474102,21474105)资助Supported by the National Natural Science Foundation of China(No.21474102,No.21474105) （21474102,21474105）
