Article

A selective fluoroionophore based on BODIPY-immobilized silica nanoparticles for Cu2+ ion.

Department of Chemistry, Research Institute of Natural Science, Gyeongsang National University, Jinju 660-701, South Korea.
Journal of Nanoscience and Nanotechnology (impact factor: 1.56). 04/2010; 10(4):2416-20. pp.2416-20
Source: PubMed

ABSTRACT A new fluorescent receptor based on BODIPY-immobilized silica nanoparticles (BODIPY-SiO2), BODIPY-SiO2, was prepared. The BODIPY-SiO2 exhibits a high affinity and selectivity for Cu2+ over competing metal ions in water. Upon the addition of Cu2+, an overall emission change of 5-fold was observed. On the other hand, except Cu2+, no significant fluorescence intensity changes were observed in the experiments using other metal ions. Interestingly, the increase in fluorescence intensity upon exposure to Cu2+ was fully reversible, as the addition of strong base to the acidic solution reversed this effect. Furthermore, we found that the BODIPY-SiO2, can remove 75% of Cu2+ ion from Cu2+ solution. Thus, the BODIPY-SiO2 can be potentially useful and effective agents of separation for selective and rapid removal of Cu2+.

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Keywords

5-fold
 
affinity
 
BODIPY-immobilized silica nanoparticles
 
BODIPY-SiO2 exhibits
 
Cu2+ solution
 
effective agents
 
emission change
 
metal ions
 
new fluorescent receptor
 
selective
 
significant fluorescence intensity changes
 
strong base
 

Hye Young Lee