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如果品红中的“醌式结构”一旦被破坏,则就会变成无色.品红显红色的实质是分子结构中的共轭体系1较大,此时形成大П键的P电子的活动范围大,П电子属于更多的原子所共有,因而这些电子所受到的束缚力越小,从而吸收带向长波方向移动(亦称为红移),移到可见光区而显红色.从一维势箱的“自由”电子模型公式也可以定性地解释这个问题.E=n~2h~2/8ml~2.若式中的1变大,E变小,λ变大(红移).1变小,E变大,λ变小(兰移).
If the “quinone structure” in magenta once destroyed, it will become colorless. The essence of magenta red is the conjugate system 1 in the molecular structure is larger, then the formation of large P bond P electron The range of motion is large, and electrons are shared by more atoms. Therefore, the smaller the binding force of these electrons, the absorption band moves to the longwave direction (also known as redshift) and moves to the visible light region to turn red. We can also interpret the problem qualitatively by using the “free” electronic model formula of the VE box: E = n ~ 2h ~ 2 / 8ml ~ 2 If Eq becomes larger, E becomes smaller and λ increases (redshift). 1 becomes smaller, E becomes larger, and λ decreases (blue shift).