| Abstrakt: |
A new adeninecarboxamide ligand, N-(9 H-purin-6-yl) pyridine-2-carboxamide (H2pzac) has been synthesized by a green chemistry method using tetrabutylammunium bromide (TBAB) ionic liquid as an environmentally friendly reaction medium. The H2pzac ligand was anchored on modified SBA-15-Cl and utilized for detection of Hg2+ in aqueous solution. The as-constructed SBA-15@Hpzac sensor shows a high specific surface area as well as pore volume of 250 m2/g and 0.54 cm3/g, respectively. The fluorescence assessment indicated that the designed SBA-15@Hpzac sensor presented highly sensitive and selective behavior to Hg2+ ion over different cations including Zn2+, Ni2+, Co2+, Cu2+, Mn2+, Pb2+, Ba2+, Mg2+, Ca2+, Na+, Fe3+, Fe2+, Al3+, Cd2+ and K+. The fluorescence response of the SBA-15@Hpzac sensor for selective detection of Hg2+ ion is excellent with detection limit (LOD) of 1.07 × 10− 6 M. The application of the SBA-15@Hpzac sensor in determination of Hg2+ ions in two real water samples was also investigated. [ABSTRACT FROM AUTHOR] |
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