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

Figure 5

Fluorescence intensity at 545 nm of L1 (10 μM) with addition of 10 μM Cu²⁺ in the absence (blank) and presence of various metal ions (50 μM) in CH₃CN/H₂O solution (1 : 1, v/v). (1) blank, (2) Ag⁺, (3) Al³⁺, (4) Ba²⁺, (5) Ca²⁺, (6) Co²⁺, (7) Cr³⁺, (8) Fe²⁺, (9) Fe³⁺, (10) Hg²⁺, (11) K⁺, (12) Li⁺, (13) Mg²⁺, (14) Mn²⁺, (15) Na⁺, (16) Ni²⁺, (17) Pd²⁺, (18) Sn⁴⁺, and (19) Zn²⁺. Excitation was performed at 500 nm.