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Identification of Isomeric Biomolecules by Infrared Spectroscopy of Solvent-Tagged Ions

Publications associées (45)

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Electrospray film deposition for solvent-elimination infrared spectroscopy

Satoshi Takahama, Giulia Ruggeri, Nikunj Dudani, Andrea Mario Arangio, Amir Yazdani, Christophe Eric Ludovic Delval

The application of electrospray (ES) for quantitative transfer of analytes from solution to an internal reflection element for analysis by Attenuated Total Reflectance - Fourier Transform Infrared (ATR-FTIR) spectroscopy has been developed in this work. Th ...

2018

New ionization and tagging methods for mass spectrometry

Xiaoqin Zhong

Mass spectrometry (MS) is an essential detection tool in bioanalytical chemistry owing to its exceptional selectivity and sensitivity, paired with rapid analyte identification and quantification. In this thesis, two classical MS and a newly developed ioniz ...

EPFL2017

We measure UV and IR spectra in the gas phase for EuOH+, EuCl+, and TbO+ ions, which are produced by an electrospray ionization source and cooled to similar to 10 K in a cold, 22-pole ion trap. The UV photodissociation (UVPD) spectra of these ions show a n ...

American Chemical Society2017

Gas-phase probes of kinetically trapped peptides

Liudmila Voronina

Gas-phase techniques are promising for studying intrinsically disordered peptides and proteins, as they can be implemented in a conformer-selective way. One of the issues that prevent them from finding a broader use is the question of to which extent the s ...

EPFL2016

Novel Approaches in Cold Ion Spectroscopy for Structural Characterization of Biomolecules in the Gas Phase

Vladimir Kopysov

Mass spectrometry is a powerful analytical technique, which has become invaluable across a wide range of scientific fields, such as "omics" sciences (e.g., proteomics), doping control and forensic sciences, drug development, environmental analysis, geologi ...

EPFL2016

Understanding the relation between the gas-phase structure of biological molecules and their solution-phase structure is important when attempting to use gas-phase techniques to address biologically relevant questions. Directly after electrospray ionizatio ...

Royal Soc Chemistry2015

UV and IR Spectroscopy of Cold H2O+-Benzo-Crown Ether Complexes

Thomas Rizzo, Yoshiya Inokuchi

The H2O+ radical ion, produced in an electrospray ion source via charge transfer from Eu3+, is encapsulated in benzo-15-crown-5 (B15C5) or benzo-18-crown-6 (B18C6). We measure UV photodissociation (UVPD) spectra of the (H2O·B15C5)+ and (H2O·B18C6)+ complex ...

American Chemical Society2015

Ambient in situ analysis and imaging of both hydrophilic and hydrophobic thin layer chromatography plates by electrostatic spray ionization mass spectrometry

Hubert Girault, Liang Qiao, Xiaoqin Zhong

Electrostatic spray ionization (ESTASI) mass spectrometry imaging (MSI), recently developed to profile spatial distribution of chemical and biochemical molecules on an insulating surface under ambient conditions, has been applied to identify and quantify c ...

RSC Publishing2015

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We report measurements of ambient amines and ammonia with a fast response chemical ionization mass spectrometer (CIMS) in a southeastern US forest and a moderately polluted midwestern site during the summer. At the forest site, mostly C3-amines (from pptv ...

Copernicus Gesellschaft Mbh2014

Atmospheric amines and ammonia measured with a chemical ionization mass spectrometer (CIMS)

Athanasios Nenes, Satoshi Takahama, Giulia Ruggeri, Hairun Guo

Copernicus GmbH2014