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

Figure 2

Fluorescence spectra ( 426 nm) of 1 (0.15 μM) in CH₃CN as a function of [Hg²⁺]. a: 0 M, b: 4.6 μM, c: 6.3 μM, d: 6.8 μM, e: 7.0 μM, f: 7.9 μM, g: 10 μM, and h: 19 μM. (The inset shows intensity of sensor 1 versus concentration of Hg²⁺.)