AbstractTwo novel fluorescent probes L1 and L2 for recognizing Al3+ have been prepared by cooperating salicylaldehyde‐derived Schiff base groups onto the upper rim of the calix[4]arene. Of these probes, L2 is the most effective at recognizing Al3+, displaying a highly selective fluorescence “on” response with an emission wavelength at 478 nm and a Stokes shift of 88 nm. Additionally, probe L2 can form a 1 : 1 coordination complex with Al3+ with a binding constant of 2.6×1010 M−1. Furthermore, its fluorescence intensity exhibits a good linear relationship with Al3+ concentration within the range of 2.0×10−5 M to 1.4×10−4 M, and the probe has a low detection limit of 4.36×10−7 M.
摘要通过在钙[4]炔的上缘配合水杨醛衍生的希夫碱基团,制备了两种识别 Al3+ 的新型荧光探针 L1 和 L2。在这些探针中,L2 是识别 Al3+ 最有效的探针,它显示出高度选择性的荧光 "开启 "响应,发射波长为 478 nm,斯托克斯偏移为 88 nm。此外,探针 L2 还能与 Al3+ 形成 1 :1 配位复合物,结合常数为 2.6×1010 M-1。此外,在 2.0×10-5 M 至 1.4×10-4 M 的范围内,探针 L2 的荧光强度与 Al3+ 浓度呈良好的线性关系,检测限低至 4.36×10-7 M。