Study on the Properties of rhodamine B fluorescent probe Y2ST

Rhodamine B, hydrazine hydrate, and HCl generated the intermediate LBXJ. Next, LBXJ, chromone 3-formaldehyde, and 100 % ethanol prepared the probe Y2ST. NMR, IR, and MS. described the intermediate and probe structures. Following the determination of the structure, tests were conducted on the response time, pH value, linearity, detection limit, accuracy, coordination ratio, and recovery of samples. Additionally, the fluorescence selectivity of ions was compared. The rate of Zn²⁺ detection in zinc gluconate was 96.1 % at 5 × 10⁻⁶ mol/L--5 × 10⁻⁵ mol/L, while the detection limit of Y2ST was 0.7 × 10⁻⁶ mol/L. It can be applied to Zn²⁺ content determination.