Qin Zhihui, Su Weiwei, Liu Ping, Ma Jinming, Zhang Yaru, Jiao Tifeng
Hebei Key Laboratory of Applied Chemistry, School of Environmental and Chemical Engineering, Yanshan University, 438 West Hebei Street, Qinhuangdao 066004, P. R. China.
State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, 438 West Hebei Street, Qinhuangdao 066004, P. R. China.
ACS Omega. 2021 Sep 17;6(38):25040-25048. doi: 10.1021/acsomega.1c04206. eCollection 2021 Sep 28.
Iron ions play an important role in our lives. Excessive or lack of iron ion intake leads to many diseases. At the same time, the water environment is easily polluted by these metal ions with the acceleration of industrialization. Therefore, the detection of iron ions in the water environment and the human body is particularly important. In this paper, we prepared a RhB-EDA fluorescent probe by condensing rhodamine B (RhB) with ethylenediamine (EDA) for high recognition of Fe. A RhB-EDA molecule itself is colorless and has no fluorescence emission in an alcohol solution. When Fe was added, the lactam ring structure of the fluorescent probe opened, and the UV and fluorescence spectra changed. At the same time, the color of the mixed solution gradually deepened toward pink. Therefore, dual spectral detection and naked-eye observation of Fe were realized. In addition, with the decrease of the pH value and the prolongation of chelating time, the ultraviolet absorbance and fluorescence emission intensity were enhanced and the color of the mixed solution deepened. The RhD-EDA fluorescent probe is simple and accurate and provides good technical support for the detection of Fe.
铁离子在我们的生活中起着重要作用。铁离子摄入过多或过少都会导致多种疾病。同时，随着工业化进程的加快，水环境很容易受到这些金属离子的污染。因此，检测水环境和人体中的铁离子尤为重要。在本文中，我们通过罗丹明B（RhB）与乙二胺（EDA）缩合制备了一种RhB-EDA荧光探针，用于对铁的高选择性识别。RhB-EDA分子本身无色，在乙醇溶液中无荧光发射。加入铁后，荧光探针的内酰胺环结构打开，紫外光谱和荧光光谱发生变化。同时，混合溶液的颜色逐渐加深至粉红色。因此，实现了对铁的双光谱检测和肉眼观察。此外，随着pH值的降低和螯合时间的延长，紫外吸光度和荧光发射强度增强，混合溶液的颜色加深。RhD-EDA荧光探简单准确，为铁的检测提供了良好的技术支持。
