Aminophenol isomers unraveled by conformer-specific far-IR action spectroscopy

2016 ◽  
Vol 18 (8) ◽  
pp. 6275-6283 ◽  
Author(s):  
Vasyl Yatsyna ◽  
Daniël J. Bakker ◽  
Raimund Feifel ◽  
Anouk M. Rijs ◽  
Vitali Zhaunerchyk
Keyword(s):  
Gas Phase ◽  
Far Infrared ◽  
Inversion Barrier ◽  
Action Spectroscopy

Far-infrared action spectroscopy of aminophenol in the gas-phase revealed isomer- and conformer-specific vibrational signatures and provided the heights of NH2 inversion barrier.

scholarly journals Probing the Formation of Isolated Cyclo-FF Peptide Clusters by Far-Infrared Action Spectroscopy

2021 ◽  
Author(s):  
Sjors Bakels ◽  
Iuliia Stroganova ◽  
Anouk Rijs
Keyword(s):  
Mass Spectrometry ◽  
Gas Phase ◽  
Cyclic Peptides ◽  
Far Infrared ◽  
Laser Desorption ◽  
Laser Desorption Mass Spectrometry ◽  
Desorption Mass Spectrometry ◽  
Action Spectroscopy ◽  
Highly Hydrophobic

Small cyclic peptides containing phenylalanine residues are prone to aggregate in the gas phase into highly hydrophobic chains. A combination of laser desorption, mass spectrometry and conformational selective IR-UV action...

scholarly journals Electronic Spectroscopy of Isolated DNA Polyanions

2018 ◽  
Author(s):  
Steven Daly ◽  
Massimiliano Porrini ◽  
Frédéric Rosu ◽  
Valerie Gabelica
Keyword(s):  
Gas Phase ◽  
Absorption Spectra ◽  
Ion Mobility ◽  
Photoelectron Spectroscopy ◽  
Binding Energies ◽  
Action Spectroscopy ◽  
Action Spectra ◽  
Vis Spectroscopy ◽  
Electron Binding Energies ◽  
Electron Binding

In solution, UV-vis spectroscopy is often used to investigate structural changes in biomolecules (i.e., nucleic acids), owing to changes in the environment of their chromophores (i.e., the nucleobases). Here we address whether action spectroscopy could achieve the same for gas-phase ions, while taking the advantage of additional mass spectrometry and ion mobility separation of complex mixtures. We therefore systematically studied the action spectroscopy of homo-base 6-mer DNA strands (dG6, dA6, dC6, dT6), and discuss the results in light of gas-phase structures validated by ion mobility spectrometry and infrared ion spectroscopy, and in light of electron binding energies measured by photoelectron spectroscopy, and calculated electronic photo-absorption spectra. When UV photons interact with oligonucleotide polyanions, two main actions may take place: (1) fragmentation and (2) electron detachment. The action spectra reconstructed from fragmentation follow the absorption spectra well, and result from multiple cycles of absorption and internal conversion. The action spectra reconstructed from the electron photodetachment (EPD) efficiency reveal interesting phenomena: EPD depends on the charge state in a manner depending on electron binding energies, and is particularly efficient for purines but not pyrimidines. EPD thus reflects not only absorption, but also particular relaxation pathways of the electronic excited states. As these pathways lead to photo-oxidation, their investigation on model gas-phase systems may prove useful to elucidate mechanisms of photo-oxidative damages, which are linked to mutations and cancers.

scholarly journals Ultraviolet Action Spectroscopy of Iodine Labeled Peptides and Proteins in the Gas Phase

2012 ◽  
Vol 117 (6) ◽  
pp. 1228-1232 ◽  
Author(s):  
Benjamin B. Kirk ◽  
Adam J. Trevitt ◽  
Stephen J. Blanksby ◽  
Yuanqi Tao ◽  
Benjamin N. Moore ◽  
...  
Keyword(s):  
Gas Phase ◽  
Action Spectroscopy

Charge‐Tagged DNA Radicals in the Gas Phase Characterized by UV/Vis Photodissociation Action Spectroscopy

2020 ◽  
Vol 132 (20) ◽  
pp. 7846-7851
Author(s):  
Yue Liu ◽  
Andy Dang ◽  
Jan Urban ◽  
František Tureček
Keyword(s):  
Gas Phase ◽  
Action Spectroscopy ◽  
Dna Radicals

Hydrogen bonding in the gas phase: the thermodynamic properties of hydrogen fluoride-ether complexes and their far infrared spectra

1971 ◽  
Vol 322 (1548) ◽  
pp. 137-146 ◽  
Keyword(s):  
Hydrogen Bonding ◽  
Gas Phase ◽  
Infrared Spectra ◽  
Equilibrium Constants ◽  
Far Infrared ◽  
Methyl Ethyl ◽  
Rotational Contour ◽  
Stretching Vibration ◽  
Conformational Rearrangements ◽  
Far Infrared Spectra

The equilibrium constants of gas-phase complexes of HF with dimethyl, methyl ethyl and diethyl ether have been measured at several temperatures using the Benesi-Hildebrand approximation on the absorption band of the HF stretching vibration in the complex. From these, values of Δ H of — 43, — 38 and — 30 kJ mol -1 respectively, have been determined. They are interpreted in terms of conformational rearrangements of the ethers when they form hydrogen bonds. The far infrared spectra of the complexes with both HF and DF have also been recorded and in each case a band observed at around 180 cm -1 which is assigned to the intermolecular stretching mode of vibration. For the complex between HF and dimethyl ether a rotational contour has been observed at about 10 cm -1 .

scholarly journals Action spectroscopy of spin forbidden states in the gas phase: A powerful probe for large non-luminescent molecules

2020 ◽  
Vol 152 (14) ◽  
pp. 144306
Author(s):  
F. Grollau ◽  
C. Pothier ◽  
M. A. Gaveau ◽  
M. Briant ◽  
N. Shafizadeh ◽  
...  
Keyword(s):  
Gas Phase ◽  
Forbidden States ◽  
Action Spectroscopy

scholarly journals IR action spectroscopy shows competitive oxazolone and diketopiperazine formation in peptides depends on peptide length and identity of terminal residue in the departing fragment

The Analyst ◽  
2014 ◽  
Vol 139 (9) ◽  
pp. 2137-2143 ◽  
Author(s):  
L. J. Morrison ◽  
J. Chamot-Rooke ◽  
V. H. Wysocki
Keyword(s):  
Gas Phase ◽  
Side Chain ◽  
Action Spectroscopy ◽  
Terminal Residue ◽  
The Third ◽  
Diketopiperazine Formation ◽  
Peptide Length

Diketopiperazine formation in gas-phase peptides depends on the side-chain of the third residue.

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