Ratiometric and selective fluorescent sensor for CuII based on internal charge transfer (ICT).
A Cu(II)-sensing, ratiometric, and selective fluorescent sensor 1, N-butyl-4,5-di[(pyridin-2-ylmethyl)amino]-1,8-naphthalimide, was designed and synthesized on the basis of the mechanism of internal charge transfer (ICT). In aqueous ethanol solutions of 1, the presence of Cu(II) induces the formation of a 1:1 metal-ligand complex, which exhibits a strong, increasing fluorescent emission centered at 475 nm at the expense of the fluorescent emission of 1 centered at 525 nm. [structure: see text]
Xu
Zhaochao
Z
State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116012, China.
Xiao
Yi
Y
Qian
Xuhong
X
Cui
Jingnan
J
Cui
Dawei
D