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

In this paper, a salamo-based copper(ii) complex probe L-Cu was synthesized, which combined with copper(ii) ions to form L-Cu for the detection of S and had a good fluorescence chemical response. Through spectral analysis, we found that S could be identified with high sensitivity and selectivity in the presence of various anions and could be used for the detection of S by the naked eye. With the addition of S, 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 HS gas, and the probe L-Cu could detect S in the gas molecules, revealing its potential application value in biology and medicine.