A high-efficiency salamo-based copper(ii) complex double-channel fluorescent probe

In this paper, a salamo-based copper(ii) complex probe L-Cu²⁺ was synthesized, which combined with copper(ii) ions to form L-Cu²⁺ for the detection of S^2- and had a good fluorescence chemical response. Through spectral analysis, we found that S^2- could be identified with high sensitivity and selectivity in the presence of various anions and could be used for the detection of S^2- by the naked eye. With the addition of S^2-, the solution color changed from colorless to bright yellow. UV absorption, fluorescence and other characterization methods were carried out, and the mechanism of action was determined. In addition, we performed a visual inspection of H₂S gas, and the probe L-Cu²⁺ could detect S^2- in the gas molecules, revealing its potential application value in biology and medicine.