一种用于半水相溶液中铁（III）测定的新型荧光传感器。

A new fluorescent sensor for the determination of iron(III) in semi-aqueous solution.

机构信息

Department of Analytical Chemistry, Faculty of Sciences, University of Cadiz, Puerto Real, Cadiz, Spain.

出版信息

J Fluoresc. 2012 May;22(3):795-8. doi: 10.1007/s10895-011-1015-z. Epub 2011 Nov 5.

PMID:22051982

Abstract

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.

摘要

现已开发出一种简单的荧光传感器 1，可在 pH 值为 7.0 的半水相中识别 Fe(III)。该传感器含有两个直接连接到萘荧光团的席夫碱型受体，在加入 Fe(III)后，其荧光强度会随浓度的增加而降低。该传感器对 Fe(III)具有选择性，可在 0.05 至 0.12 mM 之间测量 Fe(III)离子浓度。结合比确定为 1:1（主体：客体），结合常数（Logβ）为 4.01。此外，将 Fe(III)加入到 1 的溶液中会引起颜色从浅黄色变为无色，这意味着 1 也能够通过肉眼检测 Fe(III)。