摘要
紫精/聚合物薄膜光照后产生紫精自由基阳离子,产生明显的颜色变化,但由于自由基阳离子氧化成二价阳离子缓慢,导致薄膜褪色缓慢,加入电子转移剂可以促进薄膜褪色。本文以电子转移剂和苄基紫精摩尔比为1∶1,制备了多种紫精/聚乙烯吡咯烷酮(PVP)聚合物光致变色薄膜,研究了不同电子转移剂对薄膜的光致变色性能、褪色性能以及光疲劳性能的影响。结果表明:加氯化亚锡(SnCl2)的薄膜同空白样的光疲劳行为类似,含苯醌(BQ)或单壁碳纳米管(SWCNT)的薄膜无法实现循环的光写入/擦除;含氯化铜(CuCl2)或氯化铁(FeCl3)的薄膜,无光疲劳现象,具有信息的循环写入/擦除性能。
The polymer films containing viologens are photochromic owing to the formation of cation radicals by photocatalyzed reduction of viologens. The slow fading process of colored film could be enhanced by addition of electron transfer agents. Photochromic films of PVP blended with viologen and containing 1 ： 1 ratio of electron transfer agents relative to the tool of viologen were prepared and comparatively studied to investigate the effects of these agents on the photo- chromism, fading and the photofatigue behaviors. It was found that the film with SnC12 as the a- gent showed the same photochromic behavior like the controlled sample, and the films with CuC12 and FeCla as the agents did not show photofatigue and could be repeatedly photowriting/erasing, whereas the films with BQ and SWCNT as the agents did not show reversible photchromism.
出处
《信息记录材料》
2011年第4期3-8,共6页
Information Recording Materials
基金
国家自然科学基金资助(20974067)
关键词
电子转移剂
紫精
光致变色
光疲劳
electron transfer agents
viologens
photochromism
photofatigue
