A series of benzothiazole-based compounds were synthesized and characterized. Among them, probe Z showed significant dual-functional performance which was capable of sensing pH change and Cu2+. Probe Z displayed fluorescent turn-on under alkaline conditions due to deprotonation of the hydroxyl group along with the obviously color change from colorless to mint green. Interestingly, it further achieved in ratiometric detection of Cu2+ through absorbance or fluorescence signals in strong alkaline condition. The limit of detection was calculated correspondingly as 0.37 μM and 1.35 μM, respectively. Especially, the combination of the XNOR and INHIBIT logic gates could be used to confirm that one medium was in neutrality or alkalinity condition. Moreover, Z was successfully used in real water samples and test paper for fast identification of Cu2+, respectively.

中文翻译：

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一种用于检测pH值变化和Cu2的比例检测的双功能探针。

合成并表征了一系列基于苯并噻唑的化合物。其中，探针Z显示出显着的双重功能，能够感应pH值变化和Cu2 +。探针Z在碱性条件下由于羟基的去质子作用以及从无色到薄荷绿色的明显颜色变化而显示出荧光开启。有趣的是，它在强碱性条件下通过吸光度或荧光信号在Cu2 +的比例检测中进一步实现。计算出的检出限分别为0.37μM和1.35μM。特别是，XNOR和INHIBIT逻辑门的组合可用于确认一种介质处于中性或碱性条件。此外，Z已成功用于实际水样和试纸中以快速鉴定Cu2 +，