A differentially selective sensor with fluorescence turn-on response to Zn<sup>2+</sup>and dual-mode ratiometric response to Al<sup>3+</sup>in aqueous media
作者:Debabrata Maity、T. Govindaraju
DOI:10.1039/c1cc16064h
日期:——
A novel quinoline–coumarin(QC) fluoroionophore conjugated by means of a triazolyl-pyrrolidinyl linker exhibits differential dual selectivity for Zn2+ and Al3+ in mixed media. QC acts as a turn on fluorescence sensor for Zn2+ while exhibiting overall ratiometric selectivity for Al3+ in aqueous media. Moreover, QC exhibited preferential second mode of selectivity for Al3+ as it ratiometrically displaces Zn2+ from the [QC + Zn2+] complex.
一种新型喹啉-香豆素(QC)荧光团通过三唑基-吡咯烷基连接体共轭,在混合介质中对 Zn2+ 和 Al3+ 具有不同的双重选择性。QC 对 Zn2+ 起着开启荧光传感器的作用,而对水介质中的 Al3+ 则表现出总体比率选择性。此外,QC 对 Al3+ 表现出优先的第二种选择性模式,因为它能按比例将 Zn2+ 从 [QC + Zn2+] 复合物中置换出来。