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Title: 2,7-Dichlorofluorescein, a fluorescent sensor to detect Cd2+ over Na+, K+, Ca2+, Cu2+, Ni2+ and Zn2+
Authors: Goswami, Priyanka
Baruah, Sukanya
Das, Diganta Kumar
Keywords: Electrochemistry;Sensors;Fluorescence;Cadmium
Issue Date: Dec-2010
Publisher: NISCAIR-CSIR, India
IPC Code: Int. Cl.9 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 Cd2+ ions. Minor enhancement is observed with Na+ and Zn2+ ions, while no enhancement at all in fluorescence is observed with K+, Ca2+, Cu2+ and Ni2+. The enhancement in the fluorescence is explained on the basis of photoinduced electron transfer (PET) mechanism due to the binding of two Cd2+ ions to 2,7-dichlorofluorescein (log b = 3.80).
Page(s): 1617-1620
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.49A(12) [December 2010]

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