摘要
以4,4'-联吡啶分别与一溴癸烷和溴化苄反应,通过化学法合成了2种对称的紫精化合物:二溴化1,1'-二癸基-4,4'-联吡啶盐(对称癸基紫精,DV)和二溴化1,1'-二苄基-4,4'-联吡啶盐(对称苄基紫精,BV),产率均超过75%.运用红外光谱和紫外光谱表征了其结构,并采用光谱电化学法研究了它们的电致变色性能.研究结果表明,DV在0^-1.2 V区间内可在蓝灰色/蓝紫色之间循环变化,BV在0^-1.0 V区间内可在紫红色/浅黄色之间循环变化;DV在波长558 nm处,着色响应时间20.9 s,褪色响应时间11.4 s,最大对比度ΔTmax=5%;BV在波长402 nm处,着色响应时间11.32 s,褪色响应时间21.94 s,最大对比度ΔTmax=10%.
Two new symmetric alkene substituted viologen compounds 1,1 ＇-didecyl-4,4＇-bipyridini- um dibraomide （ symmetric decane viologen, DV） and 1 , 1＇-dibenzyl-4,4＇-bipyridinium dibraomide （symmetric benzyl viologen, BV） were synthesized by chemical reaction of 4,4＇-bipyridine with 1- bromodecane and benzyl bromide respectively, and both the yields is over than 75%. The com- pounds were characterized by FTIR and UV-Visible spectra, and their electrochromic properties were studied with spectroelectrochemistry. The results show that the DV can change color between blue grey and royal purple from 0 - - 1.2 V, and the BV can change color between aubergine and light yellow from 0 - - 1.0 V. At the wavelength of 558 nm, the coloring response time RTo and bleaching response time RTb of DV are 20.9 s and 11.4 s respectively, with the maximum transmittance difference △Tmax of 5% ; at the wavelength of 402 nm, the RTc and RTb of BV are 11.32 s and 21.94 s respectively, with the △Tmax of 10%.
出处
《北京服装学院学报（自然科学版）》
CAS
2013年第4期5-12,共8页
Journal of Beijing Institute of Fashion Technology：Natural Science Edition
基金
北京市科技新星项目(2007B010)
国家自然科学基金项目(20974005)
北京市自然科学基金项目(2102017)
