We have deposited 4-aminophenol on Pt(111) surfaces in ultra-high vacuum and studied the strength of its adsorption through a combination of STM, LEED, XPS and ab initio calculations. Although an ordered (2√3×2√3)R30° phase appears, we have observed that molecule-substrate interaction dominates the adsorption geometry and properties of the system. At RT the high catalytic activity of Pt induces aminophenol to lose the H atom from the hydroxyl group, and a proportion of the molecules lose the complete hydroxyl group. After annealing above 420K, all deposited aminophenol molecules have lost the OH moiety and some hydrogen atoms from the amino groups. At this temperature, short single-molecule oligomer chains can be observed. These chains are the product of a new reaction that proceeds via the coupling of radical species that is favoured by surface diffusion.

中文翻译：

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4-氨基苯酚在 Pt(111) 表面的吸附和偶联

我们在超高真空中将 4-氨基苯酚沉积在 Pt(111) 表面，并通过 STM、LEED、XPS 和从头计算的组合研究了其吸附强度。尽管出现了有序的（2√3×2√3）R30°相，但我们观察到分子 - 底物相互作用主导了系统的吸附几何形状和性质。在室温下，Pt 的高催化活性导致氨基苯酚从羟基上失去 H 原子，一部分分子失去完整的羟基。在 420K 以上退火后，所有沉积的氨基苯酚分子都失去了 OH 部分和氨基中的一些氢原子。在此温度下，可以观察到短的单分子低聚物链。