A New Fluorescent Sensor for the Determination of Iron(III) in Semi-Aqueous Solution

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2012-01Department
Química AnalíticaSource
Journal of Fluorescence (2012) 22:795–798Abstract
A simple fluorescent sensor 1 has been developed for the recognition of Fe(III) in semi-aqueous solution at pH 7.0. The sensor, containing two Schiff base type receptors directly connected to naphthalene fluorophores, shows a concentration dependent decrease in emission intensity upon Fe(III) addition. The sensor was selective for Fe(III) over other metal ions and can measure Fe(III) ion concentration between 0.05 and 0.12 mM. The binding stoichiometry was established as 1:1 (host: guest) with a binding constant (Logβ) of 4.01. Furthermore, the addition
of Fe(III) to a solution of 1 caused a colour change from light yellow to colourless meaning 1 is also capable of
detecting Fe(III) by the naked eye.
Subjects
Schiff base; Fluorescence; Sensor; Iron(III)Collections
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