A New Highly Sensitive and Selective Fluorescent Cadmium Sensor

被引：27

作者：

Goswami, Priyanka ^{[1
]}

Das, Diganta Kumar ^{[1
]}

机构：

[1] Gauhati Univ, Dept Chem, Gauhati 781014, Assam, India

来源：

JOURNAL OF FLUORESCENCE | 2012年 / 22卷 / 01期

关键词：

Cadmium; Salicylaldehyde; Semicarbazide; Fluorescence; Sensor; Photo induced electron transfer (PET); PHYSIOLOGICAL PH; ZINC; CHEMOSENSOR; ZN2+; CD2+; ENHANCEMENT; MOLECULES; CD(II); RANGE; WATER;

D O I：

10.1007/s10895-011-0971-7

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

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.

引用

页码：391 / 395

页数：5

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