“…According to the literature [ 38 , 39 , 40 , 41 , 42 , 43 , 44 ], 2,5-Dihydroxybenzaldehyde is used as the raw material, and the alkyne group or azide is connected to the hydroxyl position at the fifth position ( Figure 2 ). Then, the probes T1 , T2 , T3 , and T4 containing alkyne groups or azide groups are obtained by reacting with 2-Aminophenthiol and 2-Aminothiophenol, respectively.…”