title: Decorating (C60)n+,n= 1-3, with CO2at low temperatures: Sterically enhanced physisorption.
abstract: Multiple attachment of CO2to the monomer, dimer and trimer cations of C60has been observed in the mass spectra of He nanodroplets sequentially doped with C60and CO2and exposed to electron ionization at 50 eV. Remarkable anomalies were seen in the ion yield for CO2coverage for (C60)2+(CO2)8and (C60)3+(CO2)1,2. These provide insight into the influence of steric properties on the nature of physisorption. The enhanced stabilities of (C60)2+(CO2)8and (C60)3+(CO2)1,2are attributed to physisorption inside the "groove" of the dimer and the two "dimples" in the trimer cations of C60. Molecular dynamics simulations provide a qualitative assessment of the observed physisorption and a useful visualization of structural aspects.
authors.affiliation: Institut für Ionenphysik und Angewandte Physik, Leopold-Franzens-Universität Innsbruck, Technikerstr. 25, 6020 Innsbruck, Austria.
authors.forename: A
authors.initials: A
authors.lastname: Mauracher
authors.affiliation: Institut für Ionenphysik und Angewandte Physik, Leopold-Franzens-Universität Innsbruck, Technikerstr. 25, 6020 Innsbruck, Austria.
authors.forename: A
authors.initials: A
authors.lastname: Kaiser
authors.affiliation: Institut für Ionenphysik und Angewandte Physik, Leopold-Franzens-Universität Innsbruck, Technikerstr. 25, 6020 Innsbruck, Austria.
authors.forename: M
authors.initials: M
authors.lastname: Probst
authors.affiliation: Institut für Ionenphysik und Angewandte Physik, Leopold-Franzens-Universität Innsbruck, Technikerstr. 25, 6020 Innsbruck, Austria.
authors.forename: S
authors.initials: S
authors.lastname: Zöttl
authors.affiliation: Institut für Ionenphysik und Angewandte Physik, Leopold-Franzens-Universität Innsbruck, Technikerstr. 25, 6020 Innsbruck, Austria.
authors.forename: M
authors.initials: M
authors.lastname: Daxner
authors.affiliation: Institut für Ionenphysik und Angewandte Physik, Leopold-Franzens-Universität Innsbruck, Technikerstr. 25, 6020 Innsbruck, Austria.
authors.forename: J
authors.initials: J
authors.lastname: Postler
authors.affiliation: Departamento de Física, ICE, Universidade Federal de Juiz de Fora, Campus Universitário, Juiz de Fora, MG 36036-330, Brazil ; CAPES Foundation, Ministry of Education of Brazil, Brasília, DF 70040-020, Brazil.
authors.forename: M M
authors.initials: MM
authors.lastname: Goulart
authors.affiliation: Departamento de Física, ICE, Universidade Federal de Juiz de Fora, Campus Universitário, Juiz de Fora, MG 36036-330, Brazil.
authors.forename: F
authors.initials: F
authors.lastname: Zappa
authors.affiliation: Department of Chemistry, York University, Toronto, Ontario M3 J 1P3, Canada.
authors.forename: D K
authors.initials: DK
authors.lastname: Bohme
authors.affiliation: Institut für Ionenphysik und Angewandte Physik, Leopold-Franzens-Universität Innsbruck, Technikerstr. 25, 6020 Innsbruck, Austria.
authors.forename: P
authors.initials: P
authors.lastname: Scheier
keywords: Carbon dioxide; Fullerene cluster; He droplet; Molecular dynamics; Nanostructure; Steric effects in physisorption
references.citation: Phys Rev Lett. 1994 May 30;72(22):3542-3545
references.pmid: 10056226
references.citation: J Chem Phys. 2008 Feb 21;128(7):074303
references.pmid: 18298145
references.citation: Angew Chem Int Ed Engl. 2004 May 10;43(20):2622-48
references.pmid: 18629978
references.citation: J Chem Phys. 2010 Jun 21;132(23):234307
references.pmid: 20572705
references.citation: Phys Chem Chem Phys. 2011 Jan 21;13(3):1092-8
references.pmid: 21072422
references.citation: Phys Rev Lett. 2010 Dec 10;105(24):243402
references.pmid: 21231525
references.citation: J Phys Chem A. 2011 Sep 8;115(35):9969-76
references.pmid: 21819055
references.citation: J Chem Phys. 2011 Oct 21;135(15):154309
references.pmid: 22029315
references.citation: Phys Rev Lett. 2012 Feb 17;108(7):076101
references.pmid: 22401228
references.citation: J Phys Chem Lett. 2012 Sep 20;3(18):2598-2603
references.pmid: 23378887
references.citation: J Chem Phys. 2013 Feb 21;138(7):074311
references.pmid: 23445013
references.citation: ChemSusChem. 2013 Jul;6(7):1235-44
references.pmid: 23744834
references.citation: J Am Chem Soc. 1988 Mar 1;110(6):1657-66
references.pmid: 27557051