title: Recognition of H2PO4(-) 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 H(2)PO(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 Cu(2+) 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 H(2)PO(4)(-) and Cu(2+). 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.
authors.affiliation: School of Chemistry and Environment, South China Normal University, Guangzhou 510006, People's Republic of China.
authors.forename: Chaoliang
authors.initials: C
authors.lastname: Tan
authors.forename: Yuhui
authors.initials: Y
authors.lastname: Zheng
authors.forename: Qianming
authors.initials: Q
authors.lastname: Wang
authors.forename: Weiguang
authors.initials: W
authors.lastname: Zhang
authors.forename: Shengrun
authors.initials: S
authors.lastname: Zheng
authors.forename: Songliang
authors.initials: S
authors.lastname: Cai
mesh_terms: D003300:Copper / Q000032:analysis*; D005782:Gels / Q000737:chemistry; D057230:Limit of Detection; D049449:Luminescence; D008163:Luminescent Measurements / Q000379:methods; D010710:Phosphates / Q000032:analysis*; D019904:Polymethyl Methacrylate; D012822:Silicon Dioxide; D013725:Terbium / Q000737:chemistry*; D014867:Water
chemical_list: D005782:Gels; D010710:Phosphates; D014867:Water; D013725:Terbium; D012822:Silicon Dioxide; D003300:Copper; D019904:Polymethyl Methacrylate