AI 中文总结
研究稀有气体团簇上酞菁吸附质，结合高分辨率二维电子光谱和分子动力学模拟，揭示吸附质构型动力学，发现其亚扩散表面运动和捕获，为理解分子吸附质在纳米物体上的超快结合动力学提供见解。
AI 中文摘要
纳米颗粒具有可调的催化特性，可作为可控多分子化学的纳米反应器。此类系统的动力学和反应性关键取决于吸附质的表面结合构型、随机波动以及吸附质在纳米表面的迁移率。然而，以足够的结构、空间和时间分辨率解析这些特性仍是一项重大实验挑战。在此，我们研究了稀有气体团簇上的酞菁吸附质作为测试案例。通过结合高分辨率二维电子光谱和分子动力学模拟，我们揭示了吸附质的构型动力学，并建立了这些动力学与团簇纳米尺度特性之间的直接关系。我们的发现表明吸附质在单个表面小平面内的亚扩散表面运动和捕获。考虑到吸附质 - 表面相互作用较弱且团簇温度接近升华点，这种动力学行为似乎出乎意料。这些结果为分子吸附质在纳米尺度物体上的超快结合动力学提供了直接见解，这对于我们理解此类系统的化学性质至关重要。
英文摘要
Nanoparticles (NPs) exhibit tunable catalytic properties and serve as nanoreactors for controlled multimolecular chemistry. The kinetics and reactivity of such systems are critically governed by the surface binding configurations of adsorbates, their stochastic fluctuations, and the adsorbate mobility across the nanosurface. However, resolving these properties with sufficient structural, spatial, and temporal resolution remains a major experimental challenge. Here, we study phthalocyanine adsorbates on rare-gas clusters as a test case. By combining high-resolution two-dimensional electronic spectroscopy and molecular dynamics simulations, we reveal the configurational dynamics of the adsorbates and establish a direct relation between these dynamics and the nanoscale properties of the clusters. Our findings indicate sub-diffusive surface motion and trapping of the adsorbate within single surface facets. Such dynamical behavior seems unexpected considering the weak adsorbate-surface interaction and cluster temperatures close to the sublimation point. These results provide direct insight into the ultrafast binding dynamics of molecular adsorbates on nanoscale objects, which is critical for our understanding of the chemistry of such systems.
