Article

Recognition of H2PO 4- and Cu2+ in Water by Luminescent Terbium Silica Xerogel

Journal of Fluorescence (impact factor: 2.11). 04/2012; 21(3):1117-1122. DOI:10.1007/s10895-010-0787-x pp.1117-1122

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

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Keywords

anions
 
cations
 
Cl-
 
Cu2+ ions
 
derived powders
 
detection limit 10-5M
 
flexible inorganic/PMMA hybrid material
 
gave rise
 
host-guest interactions
 
KeywordsLuminescent–Dihydrogen phosphate–Copper ion–PMMA
 
luminescent sol-gel films
 
mechanical property
 
sensing abilities
 
specific ions
 
Terbium silica hybrid material
 
water suspension