Highly Selective Fluorescent Probe for the Detection of Copper (II) and Its Application in Live Cell Imaging

Figure 3

Fluorescence spectra of L1 (10 μM) containing different concentrations of Cu²⁺ (0–26 μM) in CH₃CN/H₂O solution (1 : 1, v/v). Excitation was performed at 500 nm. Inset: fluorescence intensity at 545 nm as a function of Cu²⁺ concentration (2–26 μM).