Influence of modification of the amino acids ionic liquids on their physico-chemical properties: Ionic liquids versus ionic liquids-supported Schiff bases
Abstract Aminoacidionicliquids and aminoacidionic liquid-supported Schiff bases, derivatives of salicylaldehyde or benzaldehyde and various aminoacids ( l -valine, l -leucine, L-isoleucine, l -threonine, l -histidine, l -methionine and l -tryptophan) have been investigated by means of various spectroscopic techniques (NMR, UV–Vis, IR). Their physico-chemical properties (glass transition temperature
A metal-free fluorescent probe for selective detection of histidine
作者:Jun Tian、Kai Lu、Yalin Wang、Yu Chen、Binyi Huo、Yixuan Jiang、Shanshan Yu、Xiaoqi Yu、Lin Pu
DOI:10.1016/j.tet.2021.132366
日期:2021.8
A highly selectivefluorescentprobe has been discovered for the recognition of L-histidine (His) without the need to use a metal cation. Mechanistic studies including 1D and 2D 1H and 13C NMR analyses and DFT calculation have revealed that the 2-formyl group of the 1,1′-binaphthyl-based probe reacts with His to form a multicyclic product and the structural rigidity of this product should have contributed
已发现一种高选择性荧光探针,无需使用金属阳离子即可识别 L-组氨酸 (His)。包括 1D 和 2D 1 H 和13 C NMR 分析和 DFT 计算在内的机理研究表明,基于 1,1'-联萘基的探针的 2-甲酰基与 His 反应形成多环产物以及该产物的结构刚性应该有助于大大增强的荧光。所有其他氨基酸与探针的反应不能产生这种结构刚性的产物,因此没有或显示出更小的荧光增强。这种探针也可以很容易地修改,以允许在水溶液或氟溶液中进行 His 的选择性检测。