摘要
在氮气保护下,制备了3种二芳基乙烯化合物1o、2o和3o,通过核磁共振进行结构表征,运用紫外-可见吸收光谱对其光致变色性能进行研究。在紫外光照射下,3种化合物在可见光区均出现了特征的关环吸收峰,最大吸收波长分别为440、511和605 nm,溶液的颜色分别由无色变为黄色、红色和蓝色,到达光稳态时间分别为150、160和600 s。到达光稳态的溶液在可见光照射下,发生开环反应,溶液颜色由有色恢复到无色。实验结果表明,乙烯环与二芳基不同位点的连接影响着二芳基乙烯分子的π-π共轭性,从而影响化合物的光致变色性能。
Three dithienylethene compounds,1o,2o,and 3o were synthesized under nitrogen protection.Their structural characterization was carried out by NMR,and their photochromic properties were investigated by UV-vis spectra.When the solutions of three compounds in CH2Cl2 were irradiated with UV light,intense absorption bands due to photocyclization emerged in visible region,the ring-closing absorption maximum was observed at 440,511,and 605 nm,respectively.The colourless solution turned yellow,red,and blue,respectively,the time taken to reach the PSS state(the photostationary state)was 150 s,160 s,and 600 s,respectively.The photocloreversion was observed when the solution in the PSS state was irradiated with Vis light,and the solutions turned back colourless.Experimental results show that theπ-πsystem is influenced by the site of the cyclopentene moiety attached to the thienyl ring,resulting in the difference of the photochromic properties of dithienylethene compounds.
作者
陈金香
黄川聪
周涛
吴玉萍
CHEN Jinxiang;HUANG Chuangcong;ZHOU Tao;WU Yuping(School of Materials Science and Engineering, Fujian University of Technology, Fuzhou 350118, China)
出处
《福建工程学院学报》
CAS
2021年第3期211-215,共5页
Journal of Fujian University of Technology
基金
福建省自然科学基金资助项目(2020J01894)
福建省教育厅科技项目(JK2017030)。
关键词
光致变色
二芳基乙烯
合成
光稳态
photochromism
dithienylethene
synthesis
photostationary state
