很多基体只对一定范围的电磁波,特别是能量较高的短波长的电磁波有响应,但不能直接吸收大部分的可见光。在很多情况下,加入光敏染料可以弥补这一缺陷。染料吸收可见光,把光生电子(按电子转移机理)或所得到的能量(按能量转移机理)传递给基体,使基体拉宽光敏范围,增加光敏度,这就是染料的光敏作用。现在举例说明它们的基本内容和实际应 Many substrates only respond to a range of electromagnetic waves, particularly high-energy, short-wave electromagnetic waves, but do not directly absorb most of the visible light. In many cases, the addition of light-sensitive dyes can make up for this drawback. The dye absorbs visible light and transfers the photogenerated electron (by electron transfer mechanism) or the resulting energy (by energy transfer mechanism) to the substrate, allowing the substrate to widen the photosensitivity range and increase the photosensitivity, which is the photosensitizing effect of the dye. Now give an example of their basic content and practical application