Abstract
On May 14, 1999, LSI Logic Corporation’s Fab in Santa Clara, California experienced a leak of BF3 which was not detected by the Telosense Air Composition Monitoring system. This event lead to a question–the reliability of leak detection techniques currently employed for toxic BF3. In this work, a novel FRET fluorescence chemosensor RN for BF3 has been designed and synthesized conveniently by incorporating rhodamine B and 1, 8-naphthalimide. Compared with other chemosensors, this chemosensor displayed ratiometric fluorescence that can overcome shortcomings of intensity-based fluorescent chemosensors. The ratio (I586/I533) of chemosensor RN showed a remarkable increase (21-fold) in less than 1min and a distinct colour change for naked-eye detection in present BF3. The response of BF3 at this sensor was linear in the wide range of 130–200μM with a detection limit of 2.7×10−5M. This chemosensor also had excellent reversibility. The 19F NMR and 1H NMR test were performed to investigate the mechanism of the chemosensor RN towards BF3. Furthermore, we evaluated its feasibility for real-time detection of BF3 in a portable manner. The facts and evidence indicated that this chemosensor had potential applications in industrial production.
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