Kowalewska Karolina, Rodriguez-Prieto Tamara, Skrzypek Slawomira, Cano Jesús, Ramírez Rafael Gómez, Poltorak Lukasz
Department of Inorganic and Analytical Chemistry, Electroanalysis and Electrochemistry Group, Faculty of Chemistry, University of Lodz, Tamka 12, 91-403 Lodz, Poland.
Analyst. 2021 Feb 21;146(4):1376-1385. doi: 10.1039/d0an02101f. Epub 2021 Jan 6.
This work is focused on the electroanalytical study of a family of five imidazolium-terminated carbosilane dendrimers (from generation G1 to G3) at the polarized liquid-liquid interface formed between water and 1,2-dichloroethane solutions. All dendrimers with permanently and positively charged imidazolium groups located at the periphery within the branched carbosilane core were found to be electrochemically active. Based on the concentration and scan rate dependencies we have concluded that these molecules undergo interfacial ion transfer processes accompanied by interfacial adsorption/desorption rather than the electrochemically induced interfacial formation of the macromolecule-anion (tetrakis(4-chlorophenyl)borate) from the organic phase complex. Also, we report several physicochemical and electroanalytical parameters (e.g. diffusion coefficients, LODs, and detection sensitivities) for the studied family of dendrimers. Our work aims to contribute to the understating of the interaction between branched macromolecules and biomimetic interfaces.
这项工作聚焦于对一族五个咪唑鎓封端的碳硅烷树枝状大分子（从第1代到第3代）在水与1,2 - 二氯乙烷溶液之间形成的极化液 - 液界面上进行电分析研究。发现在支化碳硅烷核心内部外围具有永久带正电荷的咪唑鎓基团的所有树枝状大分子都具有电化学活性。基于浓度和扫描速率依赖性，我们得出结论，这些分子经历伴随着界面吸附/解吸的界面离子转移过程，而不是由有机相络合物发生电化学诱导的大分子 - 阴离子（四（4 - 氯苯基）硼酸盐）的界面形成。此外，我们报告了所研究的树枝状大分子家族的几个物理化学和电分析参数（例如扩散系数、检测限和检测灵敏度）。我们的工作旨在有助于理解支化大分子与仿生界面之间的相互作用。
