Based on Rhodamine B, two Al³⁺/Cu²⁺-selective chemosensors were synthesized, which display a high selectivity for Al³⁺ and Cu²⁺ among environmentally and biologically relevant metal ions. A 1,8-Naphthyridine modified rhodamine derivative can detect Al³⁺ in ethanol with off–on fluorescence behavior, and detect Cu²⁺ in aqueous solution with colorimetric method. The 8-Hydroxyquinoline-based rhodamine sensor can detect Al³⁺ in ethanol with both off–on fluorescence and colorimetric methods. The detection mechanism involves a ring-opening process as a consequence of metal complex formation. Job's plots and a time-of-flight mass spectral study indicated that each chemosensor chelated Al³⁺/Cu²⁺ with 1:1 stoichiometry. The binding of the chemosensors and Al³⁺/Cu²⁺ is chemically reversible by the addition of F⁻/EDTA solution, respectively.

基于罗丹明B，合成了两个Al ³⁺ / Cu ²⁺选择性化学传感器，在环境和生物相关的金属离子中，Al ³⁺和Cu ²⁺具有很高的选择性。1,8-萘啶修饰的若丹明衍生物可以检测乙醇中的Al ³⁺，具有不连续的荧光特性，并且可以使用比色法检测水溶液中的Cu ²⁺。基于8-羟基喹啉的若丹明传感器可以检测Al ³⁺在乙醇中使用关闭式荧光法和比色法。由于形成金属络合物，检测机制涉及开环过程。Job的图和飞行时间质谱研究表明，每个化学传感器都以1：1的化学计量比螯合了Al ³⁺ / Cu ²⁺。该化学传感器的结合和Al ³⁺ /铜²⁺在化学上是可逆通过添加的F ^- / EDTA溶液，分别。