Title of article :
Novel fluoroionophores incorporating diaryl-1,3,4-oxadiazole and aza-crown ring. Potentially sensitive Mg2+ ion sensor
Author/Authors :
Mashraqui، نويسنده , , Sabir H. and Sundaram، نويسنده , , Subramanian and Bhasikuttan، نويسنده , , A.C. and Kapoor، نويسنده , , S. and Sapre، نويسنده , , Avinash V. Dharmadhikari، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2007
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.
Keywords :
Diaryl-oxadiazole-aza-crown , Synthesis , Optical spectral studies , photoinduced electron transfer , Mg2+ sensor , fluorescence
Journal title :
Sensors and Actuators B: Chemical
Journal title :
Sensors and Actuators B: Chemical
