▎ 摘　　要

In this paper, synthesis of a new, selective and sensitive fluorescence sensor based on immobilised N-1, N-1-(anthracene-9, 10-diylbis(methylene) bis (2-aminoethyl) ethane-1, 2-diamine) on graphene oxide-silica (GO-silica-ABED) is reported. The ligand was synthesised by the reaction between 9, 10-Bis-(chloromethyl)-anthracene with tris (2-amino ethyl) amine. The grafting of silica onto GO nanosheets increased the surface area and enhanced the dispersion. The synthesised materials were characterised by FT-IR spectroscopy, N-2 adsorption-desorption analysis, FE-SEM, and Raman spectroscopy. The fluorescence feature of GO-silica-ABED was studied by addition of different ions including Na+, Mn2+, Mg2+, Cd2+, Fe2+, Ca2+, Cu2+, NO3-, PO43-, Cl-, Br-, CH3COO- and I-. GO-silica-ABED has shown a selective response to Cu2+ and I- ions by quenching the fluorescence emission at 521 nm wavelength. The linear concentration range was calculated as 1.8-7.2 nM for both Cu2+ and I- ions. Also, the limit of detection was obtained as 1.4 x 10(7) and 6.6 x 10(7) for Cu2+ and I- ions, respectively. In optimum conditions, the performance of GO-silica-ABED was investigated by analysis of real samples with good responses.