2,7-Dichlorofluorescein, a fluorescent sensor to detect Cd2+ over Na+, K+, Ca2+, Cu2+, Ni2+ and Zn2+

作者：Goswami Priyanka; Baruah Sukanya; Das Diganta Kumar^*

来源：Indian Journal of Chemistry - Section A: Inorganic, Physical, Theoretical and Analytical Chemistry , 2010, 49(12): 1617-1620.

• Electrochemistry
• Sensors
• Fluorescence
• Cadmium

The intensity of the fluorescent emission spectra of 2,7-dichlorofluorescein (510-640 nm) on excitation with 350 nip 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 photoincluced electron transfer (PET) mechanism due to the binding of two Cd2+ ions to 2,7-dichlorofluorescein (log beta = 3.80).

• 出版日期2010-12