A novel luminescent chemical sensor for the determination of Pb2+ and Cu2+ ions

作者：Klonkowsi Andrzej M^*; Orlowska Maja; Ryl Jacek

来源：Sensors and Actuators B: Chemical , 2017, 247: 296-304.

DOI：10.1016/j.snb.2017.01.163

• Luminescence recognition material
• Pb2+
• Cu2+
• Selectivity
• Logic gate

Silica xerogel surface grafted with aminopropyl (PrNH2) groups was additionally treated by cetyltrimethylammonium bromide (CTAB) surfactant and ascorbic acid (asc) in alkaline solution. This material symbolized as SiO2-PrNH2-CTAB/asc, proved to be a stable luminescent material, exhibited an emission band peaked at 393 nm under excitation wavelength 335 nm. Time evolution of the band intensity suggests changes of defect concentration on the silica surface owing to modification reaction with alkaline mixture of CTAB and asc. After this treatment the material could serve as a luminescence recognition element revealing selectively Cu2+ cations in presence of other metal ions in solutions. On the other hand, emission spectra excited by wavelength 236 nm confirmed selectively presence of Pb2+ and simultaneously Cu2+ cations in aqueous solutions. In this way the luminescent material could play the role of INHIBIT and YES logic gates for both the mentioned cations.

• 出版日期2017-8