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Renzler M, Harnisch M, Daxner M, Kranabetter L, Kuhn M, Scheier P, Echt O. Fission of multiply charged alkali clusters in helium droplets - approaching the Rayleigh limit. Phys Chem Chem Phys 2016; 18:10623-9. [PMID: 27035406 DOI: 10.1039/c6cp00764c] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Electron ionization of helium droplets doped with sodium, potassium or cesium results in doubly and, for cesium, triply charged cluster ions. The smallest observable doubly charged clusters are Na9(2+), K11(2+), and Cs9(2+); they are a factor two to three smaller than reported previously. The size of sodium and potassium dications approaches the Rayleigh limit nRay for which the fission barrier is calculated to vanish, i.e. their fissilities are close to 1. Cesium dications are even smaller than nRay, implying that their fissilities have been significantly overestimated. Triply charged cesium clusters as small as Cs19(3+) are observed; they are a factor 2.6 smaller than previously reported. Mechanisms that may be responsible for enhanced formation of clusters with high fissilities are discussed.
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Affiliation(s)
- Michael Renzler
- Institut für Ionenphysik und Angewandte Physik, University of Innsbruck, Technikerstrasse 25, A-6020 Innsbruck, Austria.
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Borysik AJ, Robinson CV. The 'sticky business' of cleaning gas-phase membrane proteins: a detergent oriented perspective. Phys Chem Chem Phys 2012; 14:14439-49. [PMID: 23032570 DOI: 10.1039/c2cp41687e] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/14/2024]
Abstract
In recent years the properties of gas-phase detergent clusters have come under close scrutiny due in part to their participation in the analysis of intact membrane protein complexes by mass spectrometry. The detergent molecules that cover the protein complex are removed in the gas-phase by thermally agitating the ions by collision-induced dissociation. This process however, is not readily controlled and can frequently result in the disruption of protein structure. Improved methods of releasing proteins from detergent clusters are clearly required. To facilitate this the structural properties of detergent clusters along with the mechanistic details of their dissociation need to be understood. Pivotal to understanding the properties of gas-phase detergent clusters is the technique of ion mobility mass spectrometry. This technique can be used to assign polydisperse detergent clusters and provide information about their geometries and packing densities. In this article we consider the shapes of detergent clusters and show that these clusters possess geometries that are inconsistent with those in solution. We analyse the distributions of clusters in detail using tandem mass spectrometry and suggest that the mean charge of clusters formed from certain detergents is governed by electrostatic repulsion. We discuss the dissociation of detergent clusters and propose that detergent evaporation it a key process in the protection of protein complexes during high energy collisions in the gas-phase.
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Density functional theory of clusters of nontransition metals using simple models. ACTA ACUST UNITED AC 2005. [DOI: 10.1007/3-540-61132-0_4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/09/2023]
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SATOH T, ITO H, ICHIHARA T, SAKAE H, KATAKUSE I. Fragmentation of Doubly and Triply Charged Mercury Cluster Ions. ACTA ACUST UNITED AC 2003. [DOI: 10.5702/massspec.51.391] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Duft D, Lebius H, Huber BA, Guet C, Leisner T. Shape oscillations and stability of charged microdroplets. PHYSICAL REVIEW LETTERS 2002; 89:084503. [PMID: 12190473 DOI: 10.1103/physrevlett.89.084503] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2002] [Indexed: 05/23/2023]
Abstract
Classical Rayleigh theory predicts an instability of a surface charged liquid sphere, when the Coulomb energy E(C) exceeds twice the surface energy E(S). Previously, electrified liquid droplets have been found to disintegrate at a fissility X=E(C)/2E(S) well below one, however. We determine the stability of charged droplets in an electrodynamic levitator by observing the amplitude and phase of their quadrupolar shape oscillations as a function of the fissility. With this novel approach, which does not rely on an independent determination of the charge and surface tension of the droplets, we are able to confirm for the first time the Rayleigh limit of stability at X=1 for micrometer sized droplets of ethylene glycol.
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Affiliation(s)
- D Duft
- Centre Interdisciplinaire de Recherche Ions Lasers - CEA-CNRS-ISMRA, CIRIL, rue Claude Bloch, BP 5133, F-14070 Caen Cedex 5, France
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Blaise P, Blundell SA, Guet C, Zope RR. Charge-induced fragmentation of sodium clusters. PHYSICAL REVIEW LETTERS 2001; 87:063401. [PMID: 11497828 DOI: 10.1103/physrevlett.87.063401] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2001] [Indexed: 05/23/2023]
Abstract
The fission of highly charged sodium clusters with fissilities X>1 is studied by ab initio molecular dynamics. Na4+24 is found to undergo predominantly sequential Na+3 emission on a time scale of 1 ps, while Na(Q+)(24) ( 5< or =Q< or =8) undergoes multifragmentation on a time scale > or =0.1 ps, with Na+ increasingly the dominant fragment as Q increases. All singly charged fragments Na(+)(n) up to size n = 6 are observed. The observed fragment spectrum is, within statistical error, independent of the temperature T of the parent cluster for T< or =1500 K. These findings are consistent with and explain recent trends observed experimentally.
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Affiliation(s)
- P Blaise
- Département de Recherche Fondamentale sur la Matière Condensée, CEA-Grenoble, 17, rue des Martyrs, F-38054 Grenoble CEDEX 9, France
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Saito N, Koyama K, Tanimoto M. The stability of multiply charged vanadium, niobium and tantalum clusters. Chem Phys Lett 1999. [DOI: 10.1016/s0009-2614(98)01300-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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8
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Li Y, Blaisten-Barojas E, Papaconstantopoulos D. Molecular dynamics study of neutral and multiply charged sodium clusters. Chem Phys Lett 1997. [DOI: 10.1016/s0009-2614(97)00208-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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9
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Bréchignac C, Cahuzac P, Kebaïli N, Sarfati A, Akulin V. Experimental Evidence for the Entropy Effect in Coulombic Cluster Fission. PHYSICAL REVIEW LETTERS 1996; 77:251-254. [PMID: 10062404 DOI: 10.1103/physrevlett.77.251] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Bréchignac C, Cahuzac P, Garnier P, Kebaïli N. Experimental determination of the energy barrier for the Li262+ cluster. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 53:1091-1094. [PMID: 9983563 DOI: 10.1103/physrevb.53.1091] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Garcias F, Lombard RJ, Barranco M, Alonso JA, L�pez JM. Semi-empirical model for the fission of multiply charged metal clusters. ACTA ACUST UNITED AC 1995. [DOI: 10.1007/bf01437511] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Scheier P, Dünser B, Märk TD. Superasymmetric Fission of Multiply Charged Fullerene Ions. PHYSICAL REVIEW LETTERS 1995; 74:3368-3371. [PMID: 10058183 DOI: 10.1103/physrevlett.74.3368] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Yannouleas C, Landman U. Electronic shell effects in triaxially deformed metal clusters: A systematic interpretation of experimental observations. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 51:1902-1917. [PMID: 9978914 DOI: 10.1103/physrevb.51.1902] [Citation(s) in RCA: 78] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Garcias F, Mañanes A, López JM, Alonso JA, Barranco M. Deformed-jellium model for the fission of multiply charged simple metal clusters. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 51:1897-1901. [PMID: 9978913 DOI: 10.1103/physrevb.51.1897] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Bréchignac C, Cahuzac P, Carlier F, de Frutos M, Leygnier J, Roux JP. Coulombic fission and evaporation of antimony cluster ions. J Chem Phys 1995. [DOI: 10.1063/1.469189] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Blanc J, Broyer M, Dugourd P, Labastie P, Sence M, Wolf JP, Wöste L. Photoionization spectroscopy of small mercury clusters in the energy range from vacuum ultraviolet to soft x ray. J Chem Phys 1995. [DOI: 10.1063/1.469180] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Goldberg A, Last I, George TF. A molecular dynamics study of doubly charged Ar2+n clusters. J Chem Phys 1994. [DOI: 10.1063/1.466772] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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López JM, Alonso JA, March NH, Garcias F, Barranco M. Barrier for the reaction X20++X20+-->X402+ in alkali-metal clusters related to electron density at the bond midpoint of the supermolecule (X20+)2. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 49:5565-5569. [PMID: 10011512 DOI: 10.1103/physrevb.49.5565] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Bréchignac C, Cahuzac P, Carlier F. Shell effects in fission of small doubly charged lithium clusters. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 49:2825-2831. [PMID: 10011117 DOI: 10.1103/physrevb.49.2825] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Yannouleas C, Landman U. Shell-correction method for calculating the binding energy of metal clusters: Application to multiply charged anions. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:8376-8387. [PMID: 10007032 DOI: 10.1103/physrevb.48.8376] [Citation(s) in RCA: 52] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Li X, Whetten RL. Stability islands for doubly charged clusters below the kinetic critical size. Chem Phys Lett 1992. [DOI: 10.1016/0009-2614(92)85989-n] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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