Open AccessPositively and Negatively Charged Cesium and (C60)mCsn Cluster Ions
Author(s) -
Michael Renzler,
Lorenz Kranabetter,
Marcelo Goulart,
Paul Scheier,
Olof Echt
Publication year - 2017
Publication title -
journal of physical chemistry. c./journal of physical chemistry. c
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.401
H-Index - 289
eISSN - 1932-7455
pISSN - 1932-7447
DOI - 10.1021/acs.jpcc.6b11928
Subject(s) - ion , caesium , cluster (spacecraft) , ionization , atomic physics , chemistry , spectral line , analytical chemistry (journal) , charge (physics) , resonance (particle physics) , physics , inorganic chemistry , organic chemistry , quantum mechanics , astronomy , computer science , programming language , chromatography
We report on the formation and ionization of cesium and C 60 Cs clusters in superfluid helium nanodroplets. Size distributions of positively and negatively charged (C 60 ) m Cs n ± ions have been measured for m ≤ 7, n ≤ 12. Reproducible intensity anomalies are observed in high-resolution mass spectra. For both charge states, (C 60 ) m Cs 3 ± and (C 60 ) m Cs 5 ± are particularly abundant, with little dependence on the value of m . Distributions of bare cesium cluster ions also indicate enhanced stability of Cs 3 ± and Cs 5 ± , in agreement with theoretical predictions. These findings contrast with earlier reports on highly Cs-doped cationic fullerene aggregates which showed enhanced stability of C 60 Cs 6 building blocks attributed to charge transfer. The dependence of the (C 60 ) m Cs 3 - anion yield on electron energy shows a resonance that, surprisingly, oscillates in strength as m increases from 1 to 6.