Zhou Z.,South China Normal University |
Zheng Y.,South China Normal University |
Wang Q.,South China Normal University |
Wang Q.,Key Laboratory of the Materials for Energy Conversion and Storage
Inorganic Chemistry | Year: 2014
A novel polydentate type ligand derived from N2,N 6-bis(4,4-diethoxy-9-oxo-3-oxa-8,10-diaza-4-siladodecan-12-yl) pyridine-2,6-dicarboxamide (L) has been designed, and it played essential roles in the assembly of new organic-inorganic functional materials. First, its multiple amide groups would coordinate to lanthanide ions firmly and transfer the absorbed energy to both Eu(III) and Tb(III) simultaneously. Second, the hydrogen-bond donor units showed strong affinity to guest anion (F-). Third, the two silylated arms could induce the formation of sol-gel derived siloxane hybrid materials. Following this idea, two lanthanide luminescent amorphous particles (ASNs-Eu and ASNs-Tb) have been prepared for the recognition of fluoride ions. Further modification of the synthesis method and transformation to mesoporous network (MSNs-Eu and MSNs-Tb) led to much enhanced thermostabilities, larger specific surface area (from 78.5 to 515 m2 g-1 for Eu(III); 89.6 to 487 m2 g-1 for Tb(III)), and lower detection limits (2.5 × 10-8 M for MSNs-Eu and 3.4 × 10-8 M for MSNs-Tb) for the fluoride ion. © 2014 American Chemical Society.