论文标题
将聚氧盐杂种共价嫁接到平坦的硅/氧化硅上：氧化物层的洞察力的见解
Covalent Grafting of Polyoxometalate Hybrids onto Flat Silicon/Silicon Oxide: Insights from POMs Layers on Oxides
论文作者
论文摘要
氧化盐（POM）固定在氧化物上的固定化与在催化，能量转化/储存或分子电子的领域中的许多应用有关。优化和理解分子/氧化物界面对于合理改善最终分子材料的性能至关重要。我们在这里描述了POM杂种与远程羧酸函数的合成和共价嫁接到扁平的Si/SiO2底物上。通过使用各种表征技术（包括椭圆法，AFM，XPS和FTIR），特别注意分子层的表征以及氧化物界面处的POM锚定模式的描述。最后，以垂直连接构型进行了探测电子传输性能，并根据循环 - 可见的吸收光谱和理论计算得出的POM分子电子特征绘制了能级图并讨论了与POM分子电子特征有关。这些基于POM的分子连接的电子特性是由POM Lumo（D-轨道）驱动的，无论该系带或锚固组的性质如何。
Immobilization of polyoxometalates (POMs) onto oxides is relevant to many applications in the fields of catalysis, energy conversion/storage or molecular electronics. Optimization and understanding the molecule/oxide interface is crucial to rationally improve the performance of the final molecular materials. We herein describe the synthesis and covalent grafting of POM hybrids with remote carboxylic acid functions onto flat Si/SiO2 substrates. Special attention has been paid to the characterization of the molecular layer and to the description of the POM anchoring mode at the oxide interface through the use of various characterization techniques, including ellipsometry, AFM, XPS and FTIR. Finally, electron transport properties were probed in a vertical junction configuration and energy level diagrams have been drawn and discussed in relation with the POM molecular electronic features inferred from cyclic-voltammetry, UV-visible absorption spectra and theoretical calculations. The electronic properties of these POM-based molecular junctions are driven by the POM LUMO (d-orbitals) whatever the nature of the tether or the anchoring group.
