fluorophore and N,N-bis(2-pyridylmethyl)ethylenediamine (BPEA) as chelator. With Cd2+/Zn2+ as input, the two probes are characteristic of the transformation from “off–on” to “on–off” molecular switch by interchanging the substitution position of the fluorophore from C-4 to C-5 at the benzene ring. 4-IsoACOBA is a Cd2+-specific turn-on fluorescent probe exhibiting good discrimination between Cd2+ and Zn2+
以
咔唑酮为荧光团,N,N-双(2-
吡啶基甲基)
乙二胺(
BPEA)为
螯合剂,制备了两种新的2-
氨基苯甲酰胺结构异构体4-isoACOBA和5-isoACOBA,作为Cd 2+和Zn 2+的荧光探针。。以Cd 2+ / Zn 2+作为输入,这两个探针通过交换荧光团从C-4到C-5的取代位置,具有从“关-开”到“开-关”分子转换的特征。苯环。4-IsoACOBA是一种Cd 2+特异性开启荧光探针,在F的作用下,Cd 2+和Zn 2+具有良好的区分Cd2 + / F Zn2 + = 2.48,而5-isoACOBA是Zn 2+特定的关闭探针, F Cd2 + / F Zn2 + = 4.50。通过紫外和荧光滴定,ESI-MS分析和DFT研究,深入研究了4-isoACOBA-Cd( II)和5-isoACOBA-Zn( II)的结合行为。结果表明,电子的供/吸能力和荧光团的取代位置均对探针的传感性能和选择性产生显着影响。