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

Figure 6

(a) Fluorescence spectra of 1 ( nm, 0.15 μM) with addition of perchlorate salts of Hg²⁺, Co²⁺, Ag⁺, Cd²⁺, Mn²⁺, K⁺, Pb²⁺, Na⁺, Fe²⁺, Ca²⁺, Mg²⁺, and Cu²⁺, (123 μM). (b) The luminescence under a UV of 1 (2.3 μM) in the presence and absence of Hg²⁺, Cu²⁺, Co²⁺, Ag⁺, Cd²⁺, Mn²⁺, K⁺, Pb²⁺, Na⁺, Fe²⁺, Ca²⁺, and Mg²⁺ (3.0 μM).

(a)  

(b)