Green fluorescence poly(amidoamine) dendrimer functionalized with 1,8-naphthalimide units as potential sensor for metal cations

Abstract

The photophysical characteristics of a fluorescent PAMAM dendrimer from second generation with sixteen 4- N, N-dimethylaminoethylamino-1,8-naphthalimide units have been studied in organic solvents of different polarity. A positive solvatochromisme and dependence of the fluorescence quantum yield have been observed. The functional characteristics of PAMAM dendrimer in acetonitrile solution in the presence of some metal cations (Zn 2+, Ni 2+, Pb 2+, Mg 2+, Mn 2+and Ag +) have been investigated. An enhancement in the fluorescence intensity has been observed when Zn 2+, Ni 2+, Pb 2+ and Mg 2+ cations are used.