| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 746002 | Sensors and Actuators B: Chemical | 2007 | 4 Pages |
Abstract
Synthesis of fluoroionophores MOX and BOX incorporating one and two monoaza-15-crown-5, respectively, on photoemittive diaryl-1,3,4-oxadiazoles is reported. Neither absorption nor emission spectra of MOX and BOX were significantly altered in the presence of alkali metal ions. However, alkaline-earth metal ions, Mg2+, Ca2+ and Ba2+ produced high fluorescence enhancements, the order of enhancement being Mg2+ > Ca2+ > Ba2+. BOX, which is a poor emitter (Φf = 0.039) than MOX (Φf = 0.065) experienced the highest emission revival by 24-folds upon Mg2+complexation. Potential, therefore is available in BOX to function as a sensitive Mg2+sensor in biological systems.
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Authors
Sabir H. Mashraqui, Subramanian Sundaram, A.C. Bhasikuttan, S. Kapoor, Avinash V. Sapre,