Recognition of H2PO 4- and Cu2+ in Water by Luminescent Terbium Silica Xerogel
ABSTRACT Terbium silica hybrid material with imidazole ring that can be emissive in water has been designed and showed host-guest interactions
with specific ions (cations and anions). In detail, we studied the sensing abilities of this material by addition of the anions
H2PO4-, HSO4-, F-, Cl-, Br- and I- to water suspension of the derived powders. Only dihydrogen phosphate resulted in the quenching of the lanthanide luminescence
(detection limit 10-5M). The same way was found in Cu2+ ions which also gave rise to luminescence quenching (detection limit 10-5M). More interestingly, luminescent sol-gel films were successfully prepared by the same materials and exhibited emission
responses to H2PO4- and Cu2+. For the sake of improving its mechanical property, the robust and flexible inorganic/PMMA hybrid material with sensing capability
was also developed for future use.
KeywordsLuminescent–Dihydrogen phosphate–Copper ion–PMMA