Synthesis, Properties, and Redox Behavior of Tetracyanobutadiene and Dicyanoquinodimethane Chromophores Bearing Two Azulenyl Substituents
作者:Taku Shoji、Mitsuhisa Maruyama、Erika Shimomura、Akifumi Maruyama、Shunji Ito、Tetsuo Okujima、Kozo Toyota、Noboru Morita
DOI:10.1021/jo402104n
日期:2013.12.20
corresponding new tetracyanobutadienes (TCBDs) and dicyanoquinodimethanes (DCNQs), respectively, in excellent yields. Intramolecular CT absorption bands were found in the UV–vis spectra of the novel chromophores, and CV and DPV showed that they exhibited a reversible two-stage reduction wave, due to the electrochemical reduction of TCBD and DCNQ moieties. Color changes were also observed during the electrochemical
在Sonogashira–Hagihara条件下,通过钯催化的炔基化反应制备了在两个末端均具有氮杂烯基的乙炔衍生物。这些炔与四氰基乙烯和7,7,8,8-四氰基喹二甲烷在正式的[2 + 2]环加成-逆电环化反应中反应,分别以优异的收率分别得到相应的新的四氰基丁二烯(TCBDs)和二氰基喹二甲烷(DCNQs)。在新型发色团的紫外可见光谱中发现了分子内CT吸收带,CV和DPV显示,由于TCBD和DCNQ部分的电化学还原,它们表现出可逆的两级还原波。在电化学还原过程中还观察到颜色变化。