Two new Schiff base derivatives N,N‐dimethyl‐4‐((2‐(phenylthio) phenyl)imino)propenyl)aniline (CSP ) and 2‐(4‐(dimethylamino)phenyl) allylidene) amino)benzenethiol (CSH ) were synthesized. Sensing mechanism of the sensors was investigated using UV‐Vis spectroscopy in the presence of various metal ions. The sensor CSP shows high sensitivity and selectivity to Cu²⁺ over a wide range of other metal ions in acetonitrile (ACN)/water (H₂O) (v/v 2 : 1). The sensor CSP can detect Cu²⁺ ions by color change from yellow to pink. The complex stoichiometry between the sensor, CSP , and Cu²⁺ was found to be 2 : 1 and the binding constant was calculated to be 2.40 × 10¹⁰ M⁻². The absorbance detection limit of CSP for Cu²⁺ was determined as 2.85 × 10⁻⁶ M. The sensor, CSP , was also applied to real samples successfully.

中文翻译：

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使用席夫碱衍生物比色检测铜离子

两个新的席夫碱衍生物N，N-二甲基-4-（（（2-（苯硫基）苯基）亚氨基）丙烯基）苯胺）苯胺（CSP）和2-（4-（二甲基氨基）苯基）亚芳基）氨基）苯硫醇（CSH）合成的。在各种金属离子存在的情况下，使用紫外可见光谱研究了传感器的传感机理。传感器CSP在乙腈（ACN）/水（H ₂ O）（v / v 2：1）中对多种其他金属离子显示出对Cu ^2+的高灵敏度和选择性。传感器CSP可以通过从黄色变为粉红色的颜色来检测Cu ²⁺离子。传感器，CSP和Cu ²⁺之间的复杂化学计量测得的结合常数为2∶1，结合常数经计算为2.40×10 ¹⁰  M ^-2。的吸光度检测限CSP对Cu ²⁺被确定为2.85×10 ^-6  M的传感器，CSP，也施加到实际样品成功。