A New Highly Sensitive and Selective Fluorescent Cadmium Sensor

作者：Goswami Priyanka; Das Diganta Kumar^*

来源：Journal of Fluorescence, 2012, 22(1): 391-395.

DOI：10.1007/s10895-011-0971-7

• Cadmium
• Salicylaldehyde
• Semicarbazide
• Fluorescence
• Sensor
• Photo induced electron transfer (PET)

Condensation product (L) of salicylaldehyde and semicarbazide behaves as a fluorescent sensor for Cd2+ ion, in 1:1 DMSO:H2O, over Mn2+, Fe2+, Ni2+, Co2+, Cu2+, Pb2+ and Hg2+ ions. The emission peak of L at lambda(max)=520 nm, on excitation with 420 nm wavelength photons, showed an enhancement in intensity of ca 60-fold when interacted with Cd2+ ion. The intensity was however found to remain unaltered when interacted with metal ions-Mn2+, Fe2+, Ni2+, Co2+, Cu2+, Pb2+ and Hg2+. The intensity increases by approximately 20 fold on interaction with Zn2+ ion. The increase in the fluorescent peak can be explained on the basis of photo induced electron transfer (PET) mechanism. A 1:1 complexation between Cd2+ and L with log beta=4.25 has been proved.

• 出版日期2012-1