Yang Zhenglong, Fu Kangyu, Yu Jing, Zhou Peiting, Cheng Zhihao
College of Transportation Engineering, Key Laboratory of road and TRAFFIC Engineering of Ministry of Education, Tongji University, Shanghai, 201804, China.
Broadvision Engineering Consultants, National Engineering Laboratory for Land Transport Meteorological Disaster Control Technology, Kunming, 650041, China.
J Fluoresc. 2018 Jul;28(4):905-911. doi: 10.1007/s10895-018-2253-0. Epub 2018 Jun 24.
A colorimetric and fluorescent indicator based on cinnamamide group-containing rhodamine derivative was synthesized for the detection of Hg. The rhodamine B and cinnamamide were connected via ethylenediamine as a bridging molecule through a condensation reaction to obtain a colorimetric and fluorescent indicator for the detection of Hg in HO-EtOH (4:1, v/v). The indicator was excellent in the selectivity of Hg and was almost unaffected by other common ions such as Na, K, Mg, Fe, Cu, Zn, Cr. The Hg-containing aqueous solution turned from colorless to red within 7 min after the addition of the indicator, and had an absorption peak at 564 nm in UV-vis, which implies a significant colorimetric phenomenon. Their characteristic peaks varied with the Hg content, and they reached a linear relationship at low concentrations. The binding stoichiometry proved to be 1:1. The lowest detection limit was 4.1 × 10 mol/L, ranging from acidic to neutral.
合成了一种基于含肉桂酰胺基罗丹明衍生物的比色和荧光指示剂用于汞的检测。罗丹明B和肉桂酰胺通过乙二胺作为桥连分子经缩合反应连接，得到一种用于在水 - 乙醇（4:1，v/v）中检测汞的比色和荧光指示剂。该指示剂对汞具有优异的选择性，几乎不受其他常见离子如钠、钾、镁、铁、铜、锌、铬的影响。加入指示剂后，含汞水溶液在7分钟内从无色变为红色，在紫外 - 可见光谱中于564 nm处有一个吸收峰，这意味着显著的比色现象。它们的特征峰随汞含量而变化，在低浓度下呈线性关系。结合化学计量比证明为1:1。最低检测限为4.1×10⁻⁸mol/L，检测范围为酸性至中性。
