A novel luminescent chemical sensor for the determination of Pb2+ and Cu2+ ions
Andrzej Marian Kłonkowski , Maja Orłowska , Jacek Ryl
AbstractSilica 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.
|Journal series||Sensors and Actuators B - Chemical, ISSN 0925-4005|
|Publication size in sheets||0.5|
|Keywords in English||luminescence recognition material, Pb2+, Cu2+, selectivity, logic gate|
|Score|| = 40.0, 26-02-2018, ArticleFromJournal|
= 40.0, 26-02-2018, ArticleFromJournal
|Publication indicators||: 2016 = 5.401 (2) - 2016=4.855 (5)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.