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Title: A dual cryogenic ion trap spectrometer for the formation and characterization of solvated ionic clusters

Journal Article · · Journal of Chemical Physics
DOI:https://doi.org/10.1063/1.4936360· OSTI ID:1358401

A new experimental approach is presented in which two separate cryogenic ion traps are used to reproducibly form weakly bound solvent clusters around electrosprayed ions and messenger-tag them for single-photon infrared photodissociation spectroscopy. This approach thus enables the vibrational characterization of ionic clusters comprised of a solvent network around large and non-volatile ions. We demonstrate the capabilities of the instrument by clustering water, methanol, and acetone around a protonated glycylglycine peptide. For water, cluster sizes with greater than twenty solvent molecules around a single ion are readily formed. We further demonstrate that similar water clusters can be formed around ions having a shielded charge center or those that do not readily form hydrogen bonds. Finally, infrared photodissociation spectra of D2-tagged GlyGlyH+·(H2O)1–4 are presented. As a result, they display well-resolved spectral features and comparisons with calculations reveal detailed information on the solvation structures of this prototypical peptide.

Research Organization:
Univ. of Wisconsin, Madison, WI (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0010326
OSTI ID:
1358401
Alternate ID(s):
OSTI ID: 1227169
Journal Information:
Journal of Chemical Physics, Vol. 143, Issue 20; ISSN 0021-9606
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 56 works
Citation information provided by
Web of Science

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Cited By (4)

Hydrogen bond network structures of protonated short-chain alcohol clusters journal January 2018
Tautomerism and electronic spectroscopy of protonated 1- and 2-aminonaphthalene journal January 2018
Probing the selectivity of Li + and Na + cations on noradrenaline at the molecular level journal January 2019
Hydration motifs of ammonium bisulfate clusters of relevance to atmospheric new particle formation journal January 2019

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