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Issue 5, 2010
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Snowballs, quantum solvation and coordination: lead ions inside small helium droplets

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Abstract

Ab initio calculations are used to construct an analytical many-body potential for Pb2+Hen and Pb+Hen clusters which accounts for non pairwise additive interactions. The potential surface reproduces the global minima for cluster sizes ranging from n = 1 to n = 16 obtained from explicit ab initio calculations and found in a previous search for ultrahigh coordination numbers. Ground state energies and structures obtained by accurate diffusion quantum Monte Carlo calculations are used to investigate if quantum effects qualitatively affect the formation of coordination shells. For Pb2+ doped clusters a first solvation shell is closed at n = 12 and gradually softened by additional helium atoms which start to form a distinct second shell only at n = 16. Spin–orbit coupling profoundly influences the structure of Pb+Hen clusters and causes a gradual structural evolution without pronounced solvation shells.

Graphical abstract: Snowballs, quantum solvation and coordination: lead ions inside small helium droplets

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Article information


Submitted
03 Sep 2009
Accepted
12 Nov 2009
First published
10 Dec 2009

Phys. Chem. Chem. Phys., 2010,12, 1152-1161
Article type
Paper

Snowballs, quantum solvation and coordination: lead ions inside small helium droplets

P. Slavíček and M. Lewerenz, Phys. Chem. Chem. Phys., 2010, 12, 1152
DOI: 10.1039/B918186E

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