论文标题
热热碰撞的快速分子压缩给出键选择机械化学
Fast Molecular Compression by a Hyperthermal Collision Gives Bond-Selective Mechanochemistry
论文作者
论文摘要
使用电喷雾离子束沉积，我们在低热热平移能（2-50 eV）上与Cu（100）表面相撞复合分子Reichardt的染料（C41H30NO+），并通过扫描隧道显微镜在单聚物水平上对结果进行图像。我们观察到由翻译动能诱导的键选择性反应。碰撞脉冲压缩分子并弯曲特定的键，促使它们有选择地反应。这种动力学驱动系统寻求可热接近的反应途径，因为压缩时间尺度（子PS）比热时尺度（NS）短得多，从而产生了无法热能获得的反应产物。
Using electrospray ion beam deposition, we collide the complex molecule Reichardt's Dye (C41H30NO+) at low, hyperthermal translational energy (2-50 eV) with a Cu(100) surface and image the outcome at single-molecule level by scanning tunneling microscopy. We observe bond-selective reaction induced by the translational kinetic energy. The collision impulse compresses the molecule and bends specific bonds, prompting them to react selectively. This dynamics drives the system to seek thermally inaccessible reactive pathways, since the compression timescale (sub-ps) is much shorter than the thermalization timescale (ns), thereby yielding reaction products that are unobtainable thermally.
