Abstract：
Two Schiff base probes (S1 and S2) were prepared and synthesized by incorporating thienopyrimidine into salicylaldehyde or 3-ethoxysalicylaldehyde individually, with the aim of detecting Ga3+ and Pd2+ sequentially. Upon chelation with Ga3+, S1 and S2 exhibited fluorescence enhancement in DMSO/H2O buffer. Both S1-Ga3+ and S2-Ga3+ were quenched by Pd2+. The limit of detection for S1 in response to Ga3+ and Pd2+ was 2.86 × 10-7 and 4.4 × 10-9 M, respectively. For S2, the limit of detection for Ga3+ and Pd2+ was 4.15 × 10-8 and 3.0 × 10-9 M, respectively. Furthermore, the complexation ratios of both S1 and S2 with Ga3+ and Pd2+ were determined to be 1:2 through Job\'s plots, ESI-MS analysis, and theoretical calculations. Two molecular logic gates were constructed, leveraging the response behaviors of S1 and S2. Moreover, the potential utility of S1 and S2 for monitoring Ga3+ and Pd2+ in domestic water was verified.
摘要：
通过将噻吩并嘧啶分别掺入水杨醛或3-乙氧基水杨醛中，制备并合成了两个席夫碱探针（S1和S2），目的是依次检测Ga3+和Pd2+。与Ga3+螯合后，S1和S2在DMSO/H2O缓冲液中显示荧光增强。S1-Ga3+和S2-Ga3+均被Pd2+淬灭。S1对Ga3和Pd2的反应极限为2.86×10-7和4.4×10-9M，分别。对于S2，Ga3和Pd2的检测限为4.15×10-8和3.0×10-9M，分别。此外，S1和S2与Ga3+和Pd2+的络合比通过Job's图确定为1:2，ESI-MS分析，和理论计算。构建了两个分子逻辑门，利用S1和S2的响应行为。此外，验证了S1和S2用于监测生活水中Ga3和Pd2的潜在实用性。
