scholarly journals Infrared Multiple Photon Dissociation Spectroscopy of a Gas-Phase Oxo-Molybdenum Complex with 1,2-Dithiolene Ligands

2014 ◽  
Vol 118 (29) ◽  
pp. 5407-5418 ◽  
Author(s):  
Michael J. van Stipdonk ◽  
Partha Basu ◽  
Sara A. Dille ◽  
John K. Gibson ◽  
Giel Berden ◽  
...  
Keyword(s):  
Gas Phase ◽  
Molybdenum Complex ◽  
Infrared Multiple Photon Dissociation

Gas phase infrared multiple-photon dissociation spectra of methanol, ethanol and propanol proton-bound dimers, protonated propanol and the propanol/water proton-bound dimer

2006 ◽  
Vol 8 (8) ◽  
pp. 955 ◽  
Author(s):  
Travis D. Fridgen ◽  
Luke MacAleese ◽  
Terry B. McMahon ◽  
Joel Lemaire ◽  
Philippe Maitre
Keyword(s):  
Gas Phase ◽  
Water Proton ◽  
Infrared Multiple Photon Dissociation ◽  
Proton Bound Dimer

Gas Phase Infrared Multiple Photon Dissociation Spectra of Positively Charged Sodium Bis(2-ethylhexyl)sulfosuccinate Reverse Micelle-like Aggregates

2011 ◽  
Vol 115 (10) ◽  
pp. 2282-2286 ◽  
Author(s):  
Gianluca Giorgi ◽  
Leopoldo Ceraulo ◽  
Giel Berden ◽  
Jos Oomens ◽  
Vincenzo Turco Liveri
Keyword(s):  
Gas Phase ◽  
Reverse Micelle ◽  
Infrared Multiple Photon Dissociation ◽  
Positively Charged

Gas-phase infrared multiple photon dissociation spectroscopy of isolated SF6− and SF5− anions

2008 ◽  
Vol 129 (24) ◽  
pp. 244302 ◽  
Author(s):  
Jeffrey D. Steill ◽  
Jos Oomens ◽  
John R. Eyler ◽  
Robert N. Compton
Keyword(s):  
Gas Phase ◽  
Infrared Multiple Photon Dissociation

Assessing the impact of anion–π effects on phenylalanine ion structures using IRMPD spectroscopy

2014 ◽  
Vol 16 (44) ◽  
pp. 24223-24234 ◽  
Author(s):  
Michael Burt ◽  
Kathleen Wilson ◽  
Rick Marta ◽  
Moaraj Hasan ◽  
W. Scott Hopkins ◽  
...  
Keyword(s):  
Gas Phase ◽  
Irmpd Spectroscopy ◽  
Phase Structures ◽  
Infrared Multiple Photon Dissociation ◽  
Fluorinated Derivatives ◽  
The Impact

The gas-phase structures of two halide-bound phenylalanine anions (PheX−, X = Cl− or Br−) and five fluorinated derivatives have been identified using infrared multiple photon dissociation (IRMPD) spectroscopy.

Infrared Multiple Photon Dissociation (IRMPD) Spectroscopy of the Proton-Bound Dimer of 1-Methylcytosine in the Gas Phase

2010 ◽  
Vol 1 (19) ◽  
pp. 2891-2897 ◽  
Author(s):  
Jos Oomens ◽  
Aaron R. Moehlig ◽  
Thomas Hellman Morton
Keyword(s):  
Gas Phase ◽  
Irmpd Spectroscopy ◽  
Infrared Multiple Photon Dissociation ◽  
Proton Bound Dimer

scholarly journals Unravelling the Keto-Enol Tautomer Dependent Photochemistry and Degradation Pathways of the Protonated UVA Filter Avobenzone

2020 ◽  
Author(s):  
Jacob A. Berenbeim ◽  
Natalie Wong ◽  
Martin C. R. Cockett ◽  
Giel Berden ◽  
Jos Oomens ◽  
...  
Keyword(s):  
Gas Phase ◽  
Free Electron Laser ◽  
Selective Excitation ◽  
Uv Laser ◽  
Infrared Multiple Photon Dissociation ◽  
Enol Tautomer ◽  
Ion Yields ◽  
The Stability ◽  
First Time ◽  
Insight Into

Avobenzone (AB) is a widely used UVA filter known to undergo irreversible photodegradation. Here, we investigate the detailed pathways by which AB photodegrades by applying UV laser-interfaced mass spectrometry to protonated AB ions. Gas-phase infrared multiple-photon dissociation (IRMPD) spectra obtained with the free electron laser for infrared experiments, FELIX, (600-1800 cm-1) are also presented to confirm the geometric structures. The UV gas-phase absorption spectrum (2.5-5 eV) of protonated AB contains bands that correspond to selective excitation of either the enol or diketo forms, allowing us to probe the resulting, tautomer-dependent photochemistry. Numerous photofragments (i.e. photodegradants) are directly identified for the first time, with m/z 135 and 161 dominating, and m/z 146 and 177 also appearing prominently. Analysis of the production spectra of these photofragments reveals that that strong enol to keto photoisomerism is occurring, and that protonation significantly disrupts the stability of the enol (UVA active) tautomer. Close comparison of fragment ion yields with the TDDFT-calculated absorption spectra give detailed information on the location and identity of the dissociative excited state surfaces, and thus provide new insight into the photodegradation pathways of avobenzone, and photoisomerisation of the wider class of β-diketone containing molecules.<br>

scholarly journals Structural Diversity of Di-Metalized Arginine Evidenced by Infrared Multiple Photon Dissociation (IRMPD) Spectroscopy in the Gas Phase

Molecules ◽  
2021 ◽  
Vol 26 (21) ◽  
pp. 6546
Author(s):  
Ruxia Feng ◽  
Yicheng Xu ◽  
Xianglei Kong
Keyword(s):  
Gas Phase ◽  
Theoretical Study ◽  
Molecular Level ◽  
Structural Diversity ◽  
Laser Desorption ◽  
Biological Molecules ◽  
Laser Desorption Ionization ◽  
Irmpd Spectroscopy ◽  
Infrared Multiple Photon Dissociation ◽  
Isomerization Energy

Although metal cations are prevalent in biological media, the species of multi-metal cationized biomolecules have received little attention so far. Studying these complexes in isolated state is important, since it provides intrinsic information about the interaction among them on the molecular level. Our investigation here demonstrates the unexpected structural diversity of such species generated by a matrix-assisted laser desorption ionization (MALDI) source in the gas phase. The photodissociation spectroscopic and theoretical study reflects that the co-existing isomers of [Arg+Rb+K−H]+ can have energies ≥95 kJ/mol higher than that of the most stable one. While the result can be rationalized by the great isomerization energy barrier due to the coordination, it strongly reminds us to pay more attention to their structural diversities for multi-metalized fundamental biological molecules, especially for the ones with the ubiquitous alkali metal ions.

Infrared Multiple Photon Dissociation Action Spectroscopy of Protonated Unsymmetrical Dimethylhydrazine and Proton-bound Dimers of Hydrazine and Unsymmetrical Dimethylhydrazine

2021 ◽  
Author(s):  
Christopher P. McNary ◽  
Maria Demireva ◽  
Jonathan Martens ◽  
Giel Berden ◽  
Jos Oomens ◽  
...  
Keyword(s):  
Gas Phase ◽  
Action Spectroscopy ◽  
Phase Structures ◽  
Unsymmetrical Dimethylhydrazine ◽  
Infrared Multiple Photon Dissociation

The gas-phase structures of protonated unsymmetrical 1,1-dimethylhydrazine (UDMH) and the proton-bound dimers of UDMH and hydrazine are examined by infrared multiple photon dissociation (IRMPD) action spectroscopy utilizing light generated by...

Gas-Phase Structure and Dissociation Chemistry of Protonated Tryptophan Elucidated by Infrared Multiple-Photon Dissociation Spectroscopy

2011 ◽  
Vol 2 (4) ◽  
pp. 299-304 ◽  
Author(s):  
Warren K. Mino ◽  
Kerim Gulyuz ◽  
Da Wang ◽  
Corey N. Stedwell ◽  
Nick C. Polfer
Keyword(s):  
Gas Phase ◽  
Phase Structure ◽  
Infrared Multiple Photon Dissociation ◽  
Dissociation Chemistry ◽  
Gas Phase Structure
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