Faculty of Chemistry, Warsaw University of Technology, Noakowskiego Str. 3, 00-664 Warsaw, Poland.
Faculty of Chemistry, University of Warsaw, Pasteura Str. 1, 02-093 Warsaw, Poland.
Dalton Trans. 2021 Jun 22;50(24):8426-8433. doi: 10.1039/d1dt01287h.
Three diverse 1,3,5-triphenylbenzene derivatives bearing three ferrocene units (Fc1-Fc3) were used for the construction of electrochemical sensors for the detection of various cations or anions. The obtained derivatives contained imine (Fc1 and Fc2) or amide bonds (Fc3) between 1,3,5-triphenylbenzene and ferrocene skeletons, which further influenced the ability of the as-synthesized ferrocenylated molecules to recognize cations (Cu(ii), Pb(ii), Cr(iii) and Fe(iii); compounds Fc1 and Fc2) or monovalent anions (Br-, I-, ClO4-, NO3-, CH3COO-, and H2PO4-; compound Fc3). In the case of cation recognition, differential pulse voltammetry (DPV) experiments revealed that the Fc1 receptor was characterized by much better sensitivity compared to the Fc2 receptor and the limit of detection (LOD) values ranged from 0.5 to 1.8 μM. Similarly, such very low LOD values (0.7-1.5 μM) were also found in the case of anion recognition by the Fc3 receptor. Importantly, the advantage of the tested Fc receptors is also their long-term stability (sensors were stable at least for 2 months).
三种不同的含三个二茂铁单元的 1,3,5-三苯基苯衍生物（Fc1-Fc3）被用于构建电化学传感器，以检测各种阳离子或阴离子。所得衍生物在 1,3,5-三苯基苯和二茂铁骨架之间含有亚胺（Fc1 和 Fc2）或酰胺键（Fc3），这进一步影响了所合成的二茂铁化分子识别阳离子（Cu(ii)、Pb(ii)、Cr(iii)和 Fe(iii)；化合物 Fc1 和 Fc2）或单价阴离子（Br-、I-、ClO4-、NO3-、CH3COO-和 H2PO4-；化合物 Fc3）的能力。在阳离子识别的情况下，差分脉冲伏安法（DPV）实验表明，Fc1 受体的灵敏度明显优于 Fc2 受体，检测限（LOD）值范围为 0.5 至 1.8 μM。同样，在 Fc3 受体识别阴离子的情况下，也发现了非常低的 LOD 值（0.7-1.5 μM）。重要的是，测试的 Fc 受体的优势还在于其长期稳定性（传感器至少稳定 2 个月）。
