Johannes Kepler University Linz, Institute of Experimental Physics, Surface Science Division, Altenberger Straße 69, 4040 Linz, Austria.
Dalton Trans. 2019 Oct 7;48(39):14712-14723. doi: 10.1039/c9dt03049b.
In single crystals of 2-naphthylisonitrile-gold(i)-halide (halide = Cl, Br, I) complexes, AuAu distances are found to be significantly shorter than twice the van der Waals radius, indicating attractive interactions between gold atoms in adjacent molecules. In the particular case of the studied 2-naphthylisonitrile-gold(i) complexes, homodimers are the common structural motifs, in which the linearly coordinated gold exhibits a crossed swords arrangement with the Au atoms of two molecules being at the intersection point. The crossed swords motif is preserved upon physical vapour deposition of both the chlorine and bromine derivatives on amorphous substrates like glass and glassy carbon. The determined activation energies of desorption for the chlorine (0.9 eV) and the bromine (1.2 eV) derivative are comparable to that of unsubstituted naphthalene. Using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and ion scattering (RBS), we confirmed the chemical integrity of the molecules in thin films and revealed the orientation of the crossed swords dimers with respect to the substrate surface.
在 2-萘基异腈-金（I）卤化物（卤化物= Cl、Br、I）单晶中，发现 AuAu 距离明显短于范德华半径的两倍，表明相邻分子中金原子之间存在吸引力相互作用。在研究的 2-萘基异腈-金（I）配合物的特殊情况下，同二聚体是常见的结构基元，其中线性配位的金呈现出交叉剑的排列，两个分子的 Au 原子位于交点处。这种交叉剑基元在将氯和溴衍生物物理气相沉积到玻璃和玻璃态碳等无定形基底上时得以保留。确定的氯（0.9 eV）和溴（1.2 eV）衍生物的脱附活化能与未取代的萘相当。使用 X 射线衍射（XRD）、X 射线光电子能谱（XPS）和离子散射（RBS），我们证实了薄膜中分子的化学完整性，并揭示了交叉剑二聚体相对于基底表面的取向。
