A novel fluorescent Schiff base polymer (PTDA‐DATA‐SBP) is synthesized by amine aldehyde condensation reaction between 1,10‐phenanthroline‐2,9‐dicarboxaldehyde (PTDA) and 2,5‐diaminoterephthalicacid (DATA) as a selective fluorescent probe for Cu²⁺ detection. The as‐prepared PTDA‐DATA‐SBP displayed irregular nanospheres with a diameter of about 5 μm. Under the excitation of 338 nm, the PTDA‐DATA‐SBP had a characteristic emission peak at 565 nm. The PTDA groups in PTDA‐DATA‐SBP could coordinate with Cu²⁺ under help of carboxyl groups of DATA. Owing to the photoinduced electron transfer mechanism, the fluorescence of PTDA‐DATA‐SBP was weakened after the addition of Cu²⁺ in the presence of common ions. Hence, the PTDA‐DATA‐SBP was exploited as a fluorescent nanosensor for sensing Cu²⁺. The PTDA‐DATA‐SBP showed high selectivity and fast response towards Cu²⁺ even in presence of other relevant metal ions. The PTDA‐DATA‐SBP fluorescent sensor has a good linear range of 3.45 nM–8.00 μM, and the limit of detection was as low as 1.15 nM. The proposed PTDA‐DATA‐SBP sensor could also detect Cu²⁺ in actual samples. The work not only provided a good fluorescent probe for Cu²⁺ detection but also provided a feasible strategy to construct highly selective fluorescent probes.

中文翻译：

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用于Cu2 +检测的新型荧光1,10-邻菲咯啉-2,9-二甲醛-2,5-二氨基对苯二甲酸-席夫碱聚合物

通过1,10-菲咯啉-2,9-二甲苯甲醛（PTDA）和2,5-二氨基对苯二甲酸（DATA）之间的胺醛缩合反应合成了新型荧光Schiff基础聚合物（PTDA-DATA-SBP）作为选择性荧光探针Cu ²⁺检测。制备的PTDA-DATA-SBP显示出直径约5μm的不规则纳米球。在338 nm的激发下，PTDA-DATA-SBP在565 nm处具有特征发射峰。PTDA-DATA-SBP中的PTDA基团可以在DATA的羧基的帮助下与Cu ²⁺配合。由于光诱导的电子转移机制，加入Cu ²⁺后PTDA-DATA-SBP的荧光减弱。在常见离子的存在下。因此，PTDA-DATA-SBP被开发为用于感测Cu ²⁺的荧光纳米传感器。PTDA-DATA-SBP即使在存在其他相关金属离子的情况下也表现出高选择性和对Cu ^2+的快速响应。PTDA-DATA-SBP荧光传感器具有3.45 nM–8.00μM的良好线性范围，检测限低至1.15 nM。建议的PTDA-DATA-SBP传感器还可以检测实际样品中的Cu ²⁺。该工作不仅为Cu ²⁺检测提供了良好的荧光探针，而且为构建高选择性的荧光探针提供了可行的策略。