通讯：掺杂剂诱导的碱金属在液氦纳米液滴中的溶剂化作用

Communication: Dopant-induced solvation of alkalis in liquid helium nanodroplets.

作者信息

Renzler Michael, Daxner Matthias, Kranabetter Lorenz, Kaiser Alexander, Hauser Andreas W, Ernst Wolfgang E, Lindinger Albrecht, Zillich Robert, Scheier Paul, Ellis Andrew M

机构信息

Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstr. 25, A-6020 Innsbruck, Austria.

Institut für Experimentalphysik, Technische Universität Graz, Petergasse 16, A-8010 Graz, Austria.

出版信息

J Chem Phys. 2016 Nov 14;145(18):181101. doi: 10.1063/1.4967405.

DOI:10.1063/1.4967405

PMID:27846692

Abstract

Alkali metal atoms and small alkali clusters are classic heliophobes and when in contact with liquid helium they reside in a dimple on the surface. Here we show that alkalis can be induced to submerge into liquid helium when a highly polarizable co-solute, C, is added to a helium nanodroplet. Evidence is presented that shows that all sodium clusters, and probably single Na atoms, enter the helium droplet in the presence of C. Even clusters of cesium, an extreme heliophobe, dissolve in liquid helium when C is added. The sole exception is atomic Cs, which remains at the surface.

摘要

碱金属原子和小的碱金属团簇是典型的憎氦物质，当它们与液氦接触时，会停留在液氦表面的一个凹坑中。在此，我们表明，当向氦纳米液滴中加入一种高度可极化的共溶质C时，碱金属可以被诱导浸入液氦中。有证据表明，在C存在的情况下，所有的钠团簇，可能还有单个的Na原子，都会进入氦液滴。甚至像铯这样极端的憎氦物质团簇，在加入C后也能溶解于液氦中。唯一的例外是Cs原子，它会留在表面。