| Autor: |
Seo, Sungmin, Lee, Hye Young, Park, Minsung, Lim, Jung Mi, Kang, Dongmin, Yoon, Juyoung, Jung, Jong Hwa |
| Zdroj: |
European Journal of Inorganic Chemistry; February 2010, Vol. 2010 Issue: 6 p843-847, 5p |
| Abstrakt: |
Fluoresceinfunctionalized silica nanoparticles 1 were prepared by sol–gel reaction, and their optical sensing abilities were studied towards finding a new type of synthetic fluorogenic chemosensor for imaging Cu2+ions in living cells. Interestingly, upon addition of Cu2+in a H2O suspension of 1at pH 7.4, 1displays large chelationenhanced quenching CHEQ effects with Cu2+. With the exception of Cu2+, no significant fluorescence intensity changes were observed in the experiments with the other metal ions. These findings confirm that 1can be useful as a fluorogenicsensing material for the selective detection of Cu2+in the presence of other metal ions. This is a rare example of chromogenic sensing of a specific metal ion by functional inorganic nanomaterials. The emission change observed for chemosensor 1in the presence of Cu2+is reversible by the addition of EDTA. Furthermore, the fluoresceinfunctionalized silica nanoparticles act as a new type of synthetic fluorogenic chemosensor for imaging Cu2+ions in living cells. |
| Databáze: |
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