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7685331 
Journal Article 
A Novel Rare Earth Ion Fluorescent Probe towards the Trace Detection of 2,4,6-Trinitrotoluene Based on Fluorescence Resonance Energy Transfer 
Wang, X; Chen, H; Zhang, Hui; Sun, H; Zhang, L; Zhu, D; Gao, D; , 
2014 
Yes 
Asian Journal of Chemistry
ISSN: 0970-7077
EISSN: 0975-427X 
ASIAN JOURNAL OF CHEMISTRY 
SAHIBABAD 
26 
6 
1695-1697 
English 
WOS:000335934400038 
This paper reports a resonance energy transfer-fluorescence quenching of the core-shell structure of CaMoO4:Tb3+@SiO2 modified by amino group on the surface for the ultrasensitive and ultratrace detection of 2,4,6-trinitrotoluene (TNT) in solution environments. Organic amine was covalently modified onto the surface of silica shell to form a hybrid monolayer of amino group, The particle can specifically bind TNT Species by the charge transfer complexing or acid-base pairing interactions between electron rich amine ligands and electron-deficient aromatic rings. The resultant TNT amine complexes bound at the silica surface can Strongly suppress the fluorescence emission of the chosen dye by the fluorescence resonance energy transfer (FRET) from CaMoO4:Tb3+ fluorescence donor to the irradiative TNT-amine acceptor through intermolecular polar-polar interactions at spatial proximity. The nanoparticle can sensitively detect down to 1 nm TNT with the use of only 10 mu L of solution (2 pg TNT). The simple FRET-based nanoparticle Sensors reported here exhibit a high and stable fluorescence brightness, strong analyte affinity and good assembly flexibility and can thus find many applications in the detection of ultratrace analytes. 
246-Trinitrotoluene; Fluorescence quenching; Rare earth ion; Ultratrace detection 
7th International Conference on Multi-Functional Materials and Applications (ICMMA) 
Huainan, PEOPLES R CHINA