An easily accessible internal charge transfer chemosensor exhibiting dual colorimetric and luminescence switch on responses for targeting Cu2+

作者：Mashraqui Sabir H^*; Chandiramani Mukesh; Betkar Rupesh; Ghorpade Sushil

来源：Sensors and Actuators B: Chemical , 2010, 150(2): 574-578.

DOI：10.1016/j.snb.2010.08.037

• Chemosensor
• Michler s ketone benzhydrazide
• Internal charge transfer
• UV-visible
• Fluorescence
• Cu2+ selectivity

A new internal charge transfer probe MIZON was synthesized by condensing Michler s ketone with 4-(N,N'-dimethylamino)benzhydrazide The spectrophotometric and fluorimetric titrations with metal ions of biological and environmental importance were performed in H2O-CH3CN (1 1 v/v) system buffered by Tris-HCl pH = 74 +/- 0 1 The probe MIZON was found to interact selectively with Cu2+ inducing remarkably high absorbance red shift by 240 nm and 11-fold enhancement in the emission intensity In contrast several other metal ions viz L+ Na+ K+ Ca2+ Mg2+ Ba2+ Pb2+ Co2+ Cd2+ Zn2+ Ni2+ and Hg2+ even at substantially higher concentration than Cu2+ did not exert significant perturbation in the photophysical profile of the probe The detection limit of Cu7+ calculated from the more sensitive fluorescence data was found to be 5 5 x 10(-7) M Potential the

• 出版日期2010-10-28