A New Highly Sensitive and Selective Fluorescent Cadmium Sensor
A New Highly Sensitive and Selective Fluorescent Cadmium Sensor
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DOI：
10.1007/s10895-011-0971-7
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发表时间：
2012-01-01
影响因子：
2.7
通讯作者：
Das, Diganta Kumar
中科院分区：
文献类型：
--
作者：
Goswami, Priyanka;Das, Diganta Kumar
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.
