article i nfo The deposition of palladium on a novel, reversibly protonatable, pyridyl-terminated self-assembled monolay- er on gold substrates has been studied by X-ray photoelectron spectroscopy (XPS), near-edge X-ray absorp- tion fine structure spectroscopy (NEXAFS spectroscopy) and time of flight-secondary ion mass spectrometry (ToF-SIMS). For this purpose, 12-(pyridin-4-yl)dodecane-1-thiol, consisting of a surface-active head group, an unfunctionalized hydrocarbon backbone and a terminal pyridyl group, has been synthesized and deposit- ed on gold surfaces. Coordination of Pd(II) ions to the pyridyl group was examined. Furthermore, a reversible protonation/deprotonation cycle has been applied, and the relation between protonation and the amount of complexed palladium was studied. Investigation of the SAM by angle-resolved NEXAFS spectroscopy revealed the aliphatic backbone to be preferentially upright oriented with the aromatic head group being not preferentially oriented. The palladium layer was further coordinated with a CF3-labeled terpyridine li- gand in order to prove the accessibility of the Pd(II) ions to further complexation and the platform useful for deposition of further layers toward a multi-layered system.

中文翻译：

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钯（II）-离子和三联吡啶-配体的连续配位在金上以吡啶为末端的自组装单层

文章信息 通过 X 射线光电子能谱 (XPS)、近边 X 射线吸收精细结构研究了钯在金基材上新型、可逆质子化、吡啶基封端的自组装单层上的沉积光谱（NEXAFS 光谱）和飞行时间二次离子质谱（ToF-SIMS）。为此，12-(pyridin-4-yl)dodecane-1-thiol 由表面活性的头部基团、未官能化的烃主链和末端吡啶基团组成，已被合成并沉积在金表面。检测了 Pd(II) 离子与吡啶基的配位。此外，还应用了可逆质子化/去质子化循环，并研究了质子化与络合钯量之间的关系。通过角分辨 NEXAFS 光谱对 SAM 的研究表明，脂肪族主链优先直立取向，而芳族头基不优先取向。钯层进一步与 CF3 标记的三联吡啶配体配位，以证明 Pd(II) 离子可进一步络合，并且该平台可用于向多层系统沉积更多层。