Barrena E, Palacios-Rivera R, Babuji A, Schio L, Tormen M, Floreano L, Ocal C
Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus UAB, Bellaterra, E-08193, Barcelona, Spain.
CNR-IOM, Laboratorio Nazionale TASC, Basovizza SS-14, Trieste 34149, Italy.
Phys Chem Chem Phys. 2022 Jan 26;24(4):2349-2356. doi: 10.1039/d1cp05146f.
By employing diverse surface sensitive synchrotron radiation spectroscopies we demonstrate that the fluorine content of initial CF deposited at room temperature on Ag(111) varies with molecular coverage. At the very early stages of deposition, CF fully de-fluorinates and transforms into C. Strong indications of silver fluoride formation are provided. The chemical footprint of fluorinated fullerenes emerges at relatively low molecular coverage indicating that the degree of fullerene de-fluorination decreases (from total to partial de-fluorination) as molecules are deposited. Full de-fluorination stops well before the substrate surface is completely covered by fullerenes. At the molecular level, the fluorine loss observed by spectroscopic techniques is supported by scanning tunneling microscopy imaging. Both molecules and metal surface are importantly involved in the process.
通过采用多种表面敏感的同步辐射光谱技术，我们证明了室温下沉积在Ag(111)上的初始CF的氟含量随分子覆盖率而变化。在沉积的最初阶段，CF完全脱氟并转化为C。有强有力的迹象表明形成了氟化银。氟化富勒烯的化学特征在相对较低的分子覆盖率时出现，这表明随着分子的沉积，富勒烯的脱氟程度降低（从完全脱氟到部分脱氟）。在底物表面被富勒烯完全覆盖之前，完全脱氟就已停止。在分子水平上，扫描隧道显微镜成像支持了光谱技术所观察到的氟损失。分子和金属表面在这个过程中都起着重要作用。
