protonated with imidazole derivatives under neutral conditions and was absorbed at longer wavelengths compared with carboxylic acids. The absorption peak with the imidazolyl group intramolecularly combined was highly affected by the structure, protonated Nα-retinylidene-L-histidine octadecylamide having an absorption maximum at 494 nm caused by the inductive effect and the polar imidazolyl group.
使用外部添加或分子内组合的
咪唑基研究了标题效应。N-视黄基
丁胺在中性条件下被
咪唑衍
生物质子化,并且与
羧酸相比在更长的波长下被吸收。分子内结合
咪唑基的吸收峰受结构的影响很大,质子化的 Nα-视黄亚基-
L-组氨酸十八烷基酰胺在 494 nm 处具有最大吸收,由诱导效应和极性
咪唑基引起。