Mrzygłód Aleksandra, García Armada M Pilar, Rzonsowska Monika, Dudziec Beata, Nowicki Marek
Faculty of Chemistry, Adam Mickiewicz University in Poznan, Uniwersytetu Poznańskiego 8, 61-614 Poznan, Poland.
Centre for Advanced Technologies, Adam Mickiewicz University in Poznan, Uniwersytetu Poznańskiego 10, 61-614 Poznan, Poland.
Inorg Chem. 2023 Oct 16;62(41):16932-16942. doi: 10.1021/acs.inorgchem.3c02628. Epub 2023 Sep 29.
Dendrimers exhibiting reversible redox properties have attracted extensive attention for their potential as electron transfer mediators, catalysts, and molecular sensors. In this study, we introduce intriguing G1 and G2 dendrimers featuring double-decker silsesquioxane cores and silylferrocene moieties. Through a carefully orchestrated sequence of condensation, reduction, and hydrosilylation reactions, these compounds were synthesized and comprehensively characterized spectroscopically and spectrometrically. Our investigation also encompassed the examination of their properties, including thermal stability, solubility in common organic solvents, and electrochemical behavior. We determined that these dendrimers possess the capability to form monolayers on platinum electrodes, which we conclusively demonstrated through the probing of cyclic voltammetry, electrochemical impedance spectroscopy, and scanning electron microscopy imaging. Notably, this study marks the first-ever example of modifying double-decker silsesquioxane cores with ferrocene groups while simultaneously representing one of the scarce instances of dendrimers exhibiting an open double-decker silsesquioxane core.
具有可逆氧化还原特性的树枝状大分子因其作为电子转移介质、催化剂和分子传感器的潜力而受到广泛关注。在本研究中，我们介绍了具有双层倍半硅氧烷核心和甲硅烷基二茂铁部分的有趣的G1和G2树枝状大分子。通过精心安排的缩合、还原和硅氢化反应序列，合成了这些化合物，并通过光谱和光谱法进行了全面表征。我们的研究还包括对它们的性质进行考察，包括热稳定性、在常见有机溶剂中的溶解性以及电化学行为。我们确定这些树枝状大分子具有在铂电极上形成单层的能力，我们通过循环伏安法、电化学阻抗谱和扫描电子显微镜成像的探测最终证明了这一点。值得注意的是，本研究标志着首次用二茂铁基团修饰双层倍半硅氧烷核心的例子，同时也是树枝状大分子呈现开放双层倍半硅氧烷核心的罕见实例之一。
