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.

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 reactions of cyclopropenylidene with protonated alkyl amines

The Analyst ◽  
2016 ◽  
Vol 141 (8) ◽  
pp. 2412-2417 ◽  
Author(s):  
Ziqing Lin ◽  
Lei Tan ◽  
Yang Yang ◽  
Mingji Dai ◽  
František Tureček ◽  
...  
Keyword(s):  
Gas Phase ◽  
Gas Phase Reactions ◽  
Alkyl Amines ◽  
Protonated Amines ◽  
Proton Bound Dimer

Reactions of c-C3H2 with protonated amines are driven by its high gas-phase basicity, forming proton-bound dimer as the first step.

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>

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