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。