College of Guangling, College of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou, 225002, People's Republic of China.
J Fluoresc. 2020 Mar;30(2):309-316. doi: 10.1007/s10895-020-02499-x. Epub 2020 Jan 31.
The poly amino acid ionic liquid (poly-1-vinyl-3-butylimidazolium glutamate acid, p-1-VbmGlu), with a stable up-conversion fluorescence(UCF) probe, was firstly prepared and the synthesis conditions were optimized. The UCF were found to be specifically quenched by Fe(III), but not respond to Fe(II). In HO medium, Fe(II) posed strong quenching effect on the UFC owing to Fe(III) produced by redox between HO.and Fe(II). Therefore p-1-VbmGlu was employed as a UFC for Fe(II)/Fe(III) speciation analysis under the control of HO. The detection limits of Fe(II)/Fe(III) were 6.16 ng/mL and 4.48 ng/mL, with relative standard deviations of 1.1% and 2.0%, respectively. This method was successfully utilized in the analysis of Fe(II)/Fe(III) in multiple real samples.
聚氨基酸离子液体（聚-1-乙烯基-3-丁基咪唑谷氨酸，p-1-VbmGlu）作为一种稳定的上转换荧光（UCF）探针被首次制备，并对其合成条件进行了优化。研究发现，UCF 可被 Fe(III)特异性猝灭，但对 Fe(II)没有响应。在 HO 介质中，由于 HO 和 Fe(II)之间的氧化还原反应生成 Fe(III)，Fe(II)对 UCF 产生了强烈的猝灭作用。因此，p-1-VbmGlu 被用作 HO 控制下 Fe(II)/Fe(III)形态分析的 UCF。Fe(II)/Fe(III)的检测限分别为 6.16ng/mL 和 4.48ng/mL，相对标准偏差分别为 1.1%和 2.0%。该方法成功地应用于多种实际样品中 Fe(II)/Fe(III)的分析。
