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Ratiometric and Selective Fluorescent Sensor for Cu<sup>II</sup>Based on Internal Charge Transfer (ICT)

Organic Letters · 2005 · Vol. 7(5) · pp. 889–892

Zhaochao Xu✉(East China University of Science and Technology)Yi Xiao(Dalian University of Technology)Xuhong Qian(East China University of Science and Technology)Jingnan Cui(East China University of Science and Technology)Dawei Cui(Dalian University of Technology)

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Abstract

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]

Molecular Sensors and Ion Detection Analytical Chemistry and Sensors Electrochemical Analysis and ApplicationsFluorescenceChemistryAqueous solutionPhotochemistryLigand (biochemistry)Charge (physics)MetalAqueous mediumPhysical chemistryOrganic chemistry

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