Photoinduced Molecule Formation of Spatially Separated Atoms on Helium Nanodroplets,The Journal of Physical Chemistry Letters

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Photoinduced Molecule Formation of Spatially Separated Atoms on Helium Nanodroplets
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2018-06-12 00:00:00 , DOI: 10.1021/acs.jpclett.8b01530
Florian Lackner ₁ , Wolfgang E. Ernst ₁

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Besides the use as cold matrix for spectroscopic studies, superfluid helium droplets have served as a cold environment for the synthesis of molecules and clusters. Since vibrational frequencies of molecules in helium droplets exhibit almost no shift compared to the free molecule values, one could assume the solvated particles move frictionless and undergo a reaction as soon as their paths cross. There have been a few unexplained observations that seemed to indicate cases of two species on one droplet not forming bonds but remaining isolated. In this work, we performed a systematic study of helium droplets doped with one rubidium and one strontium atom showing that besides a reaction to RbSr, there is a probability of finding separated Rb and Sr atoms on one droplet that only react after electronic excitation. Our results further indicate that ground-state Sr atoms can reside at the surface as well as inside the droplet.

中文翻译：

氦纳米液滴上空间分离原子的光诱导分子形成

除了用作光谱研究的冷基质外，超流体氦滴还用作合成分子和簇的冷环境。由于氦液滴中分子的振动频率与自由分子值相比几乎没有变化，因此人们可以假设溶剂化的粒子无摩擦地运动，并在它们的路径交叉时立即发生反应。有一些无法解释的观察结果似乎表明一个液滴上的两个物种没有形成键，而是保持孤立的情况。在这项工作中，我们对掺有一个rub和一个锶原子的氦滴进行了系统的研究，结果表明，除了与RbSr发生反应外，还有可能在一个液滴上发现分离的Rb和Sr原子，这些原子只有在电子激发后才发生反应。

更新日期：2018-06-12

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