Georgios Papadopoulos

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We describe here experiments that combine differential ion mobility, which separates conformational isomers of biomolecular ions, with electronic spectroscopy in a cold, radio-frequency ion trap. Although the low temperature attainable in a cold ion trap g ...

We present in this work experiments that push the limits of cold ion spectroscopy to the study of complex peptides and small proteins in the gas phase. Although the low temperature attainable in a cold ion trap greatly simplifies the electronic spectra of ...

We report here a new technique for spectroscopic studies of protonated, gas- phase biomolecules and demonstrate its utility by measuring highly-resolved electronic and infrared spectra of peptides of up to 17 amino acids. After UV excitation of an aromatic ...

We employ Cold Ion Spectroscopy (CIS) in conjunction with high-Field Asymmetric Waveform Ion Mobility Spectrometry (FAIMS) to study the peptide bradykinin in its doubly protonated charge state ([bk+2H]2+). Using FAIMS we partially separate the electrospray ...

Georgios Papadopoulos

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Spectroscopy of mobility-selected biomolecular ions

A Combination of Cold Ion Spectroscopy and Ion Mobility for the Study of Complex Peptides and Small Proteins

Spectroscopy of Protonated Peptides Assisted by Infrared Multiple Photon Excitation

Conformational distribution of bradykinin [bk+2H]2+ revealed by cold ion spectroscopy coupled with FAIMS