Recognition of carboxylic acids and phosphonic acids using 1,8-diphenylnaphthalene-based diguanidine
作者:Takahiro Kusukawa、Ryosuke Mura、Masashi Ooe、Ryuki Sumida、Ayaka Nakagawa
DOI:10.1016/j.tet.2020.131770
日期:2021.1
addition of 1,3-benzenediacetic acids 3. However, after the addition of other types of aliphatic dicarboxylic acids, such as α,ω-dicarboxylic acids, only a weak yellowish fluorescence was observed and selective recognition of the 1,3-benzenediacetic acids 3 was developed. On the other hand, for the recognition of diphosphonic acid derivatives (5–7), a light blue, blue or pinkish fluorescence was observed
已经设计并合成了基于二苯基萘的二胍(1),用于识别二羧酸和二膦酸。二胍1在DMSO溶液中与二羧酸和二膦酸衍生物形成1∶1的配合物,并通过DOSY NMR光谱法确定配合物的形成。的二胍的弱淡黄色荧光1在DMSO溶液变成强带蓝色的荧光添加后1,3 -苯二羧酸3。但是,添加其他类型的脂族二羧酸后,例如α,ω-二羧酸,仅观察到微弱的淡黄色荧光,并且选择性识别了1,3-苯二乙酸3。在另一方面,对于识别二膦酸衍生物(的5 - 7),淡蓝色,观察到蓝色或粉红色荧光。有趣的是,通过二维NOESY分析成功地确定了胍基与含氧酸的结合模式(两种现有的向三个氮原子的结合模式)。荧光量子产率(Φ FL)的适度增加通过引入胍基的并与二羧酸结合3比1,8-二苯基萘本身的 二胍1的这些荧光特性可用于检测二羧酸和二膦酸。