In this study, a new phenolphthalein derivative, FFIZNA, has been planned and successfully prepared in an uncomplicated way. The probe FFIZNA could selectively monitor Al³⁺ and Zn²⁺ among other relevant cations with diverse colors through a turn-on emission response in EtOH:HEPES (9/1;v/v) media owing to the chelation enhanced fluorescence (CHEF), prevention of ESIPT, -C=N- isomerization and PET of the probe FFIZNA. The interactions of Al³⁺ and Zn²⁺ with the probe FFIZNA were confirmed by emission spectroscopy, Job’s plot and ¹H-NMR titration substantiated 1:2 reaction stoichiometry between FFIZNA and Al³⁺ and Zn²⁺. The time-response study displayed that the emission of FFIZNA with Al³⁺ and Zn²⁺, rapidly boosted and reached the stable value in less than 3.0 and 4.0 min, respectively. Therefore, the FFIZNA has successfully been utilized to the dual recognition of Al³⁺ and Zn²⁺ in solutions.

Graphical abstract

Phenolphthalein conjugated schiff base as a dual emissive fluorogenic probe for the detection aluminum (III) and zinc (II) ions.

中文翻译：

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酚酞共轭席夫碱作为识别铝（III）和锌（II）离子的双发射荧光探针

在这项研究中，已经计划并以简单的方式成功制备了新的酚酞衍生物FFIZNA。由于螯合增强的荧光（CHEF），探针FFIZNA可以通过在EtOH：HEPES（9/1; v / v）介质中的开启发射响应，选择性地监视具有各种颜色的其他相关阳离子中的Al ³⁺和Zn ²⁺。，ESIPT的预防，-C = N-异构化和探针FFIZNA的PET 。Al ³⁺和Zn ²⁺与探针FFIZNA的相互作用已通过发射光谱，Job's图和¹证实。H-NMR滴定证实了FFIZNA与Al ³⁺和Zn ²⁺之间的1：2反应化学计量。时间响应研究表明，Al ³⁺和Zn ²⁺的FFIZNA的发射迅速增强，并分别在不到3.0和4.0 min内达到稳定值。因此，FFIZNA已成功用于溶液中Al ³⁺和Zn ²⁺的双重识别。

图形概要

酚酞共轭席夫碱作为双发射荧光探针，用于检测铝（III）和锌（II）离子。