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Title: 2,7-Dichlorofluorescein, a fluorescent sensor to detect Cd<sup>2+</sup> over Na<sup>+</sup>, K<sup>+</sup>, Ca<sup>2+</sup>, Cu<sup>2+</sup>, Ni<sup>2+</sup> and Zn<sup>2+</sup>
Authors: Goswami, Priyanka
Baruah, Sukanya
Das, Diganta Kumar
Keywords: Electrochemistry
Issue Date: Dec-2010
Publisher: NISCAIR-CSIR, India
Series/Report no.: Int. Cl.<sup>9</sup> G01N21/64
Abstract: The intensity of the fluorescent emission spectra of 2,7-dichlorofluorescein (510-640 nm) on excitation with 350 nm enhances on interaction with Cd<sup>2+</sup> ions. Minor enhancement is observed with Na<sup>+</sup> and Zn<sup>2+</sup> ions, while no enhancement at all in fluorescence is observed with K<sup>+</sup>, Ca<sup>2+</sup>, Cu<sup>2+</sup> and Ni<sup>2+</sup>. The enhancement in the fluorescence is explained on the basis of photoinduced electron transfer (PET) mechanism due to the binding of two Cd<sup>2+</sup> ions to 2,7-dichlorofluorescein (log b = 3.80).
Description: 1617-1620
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.49A(12) [December 2010]

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