Synthesis of Novel Fluorescent Sensors Based on Naphthalimide Fluorophores for the Highly Selective Hg²⁺-Sensing

Figure 3

Fluorescence spectra ( 420 nm) of 2 (0.82 μM) in CH₂Cl₂ as a function of [Hg²⁺]. a: 0 M, b: 1.2 μM, c: 2.7 μM, d: 3.3 μM, e: 4.6 μM, f: 24.3 μM, and g: 79.6 μM. (The inset shows intensity of sensor 2 versus concentration of Hg²⁺.)