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 H2PO -4 , HSO -4 , 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 10-5 M). The same way was found in Cu2+ ions which also gave rise to luminescence quenching (detection limit 10-5 M). More interestingly, luminescent sol-gel films were successfully prepared by the same materials and exhibited emission responses to H2PO -4 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.
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Q. M. appreciates National Natural Science Foundation of China (21002035) and talent fund provided by Guangdong Province (No. C10208).
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Tan, C., Zheng, Y., Wang, Q. et al. Recognition of H2PO -4 and Cu2+ in Water by Luminescent Terbium Silica Xerogel. J Fluoresc 21, 1117–1122 (2011). https://doi.org/10.1007/s10895-010-0787-x
- Dihydrogen phosphate
- Copper ion