Abstract：
A novel coumarin-based fluorescent sensor CHE, incorporating 2-hydrazinylbenzothiazole and coumarin aldehyde, has been developed that demonstrated a preferential detection of Hg2+ and Ag+ in presence of interferences. Compared to previously prevalent intensity-based fluorescent probes, CHE exhibited a ratiometric fluorescence response to Hg2+ and Ag+, and further accurately differentiated Hg2+ and Ag + using the differential extractive ability of EDTA when interacting with ion-CHE complexes. Sensing mechanism was investigated and elucidated. The chemosensor CHE was successfully applied to detect Hg2+ and Ag+ in six distinct samples with satisfactory results. Additionally, combinatorial logic circuits were constructed utilizing three distinct logic gates (NOT, OR, and INH) based on the sensor\'s differential output signals in response to Hg2+/Ag+ and other cations. Interestingly, utilizing the reversible and reproducible switching behavior of the EDTA interaction with Hg2+, a conceptual \'Write-Read-Erase-Read\' memory function with multi-write capability was proposed, offering a novel perspective for molecular-based memory systems.
摘要：
一种新型香豆素荧光传感器CHE,掺入2-肼基苯并噻唑和香豆素醛，已开发出在干扰存在下优先检测Hg2和Ag的方法。与以前流行的基于强度的荧光探针相比，CHE对Hg2+和Ag+表现出比率荧光响应，并使用EDTA与离子-CHE络合物相互作用时的差异提取能力进一步准确区分Hg2和Ag。研究并阐明了传感机理。化学传感器CHE已成功用于检测六个不同样品中的Hg2和Ag，结果令人满意。此外,组合逻辑电路是利用三个不同的逻辑门(NOT，OR,和INH)基于传感器响应Hg2+/Ag+和其他阳离子的差分输出信号。有趣的是,利用EDTA与Hg2+相互作用的可逆和可重复的开关行为，提出了具有多写功能的概念性“写-读-擦除-读”内存功能，为基于分子的记忆系统提供了新的视角。
