BerlinTrap: A new cryogenic 22-pole ion trap spectrometer
| Autor: | Pablo Nieto, Otto Dopfer, Alexander Sheldrick, David Müller, Dieter Gerlich, Alan Günther |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Spectrometer Analytical chemistry 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Mass spectrometry 01 natural sciences Atomic and Molecular Physics and Optics Ion source 0104 chemical sciences Ion law.invention Reflectron law Ion trap Physical and Theoretical Chemistry Atomic physics Nuclear Experiment 0210 nano-technology Spectroscopy Quadrupole mass analyzer |
| Zdroj: | Journal of Molecular Spectroscopy. 332:8-15 |
| ISSN: | 0022-2852 |
| DOI: | 10.1016/j.jms.2016.08.017 |
| Popis: | The design and first applications of a new tandem mass spectrometer (BerlinTrap) combining an electrospray ion source, a quadrupole mass spectrometer, a cryogenic 22-pole ion trap (4–300 K), and an orthogonal reflectron time-of-flight mass spectrometer are described. The trapped ions are cooled by helium buffer gas cooling. The formation and solvation shell structure of weakly-bound HenH3O+ complexes and the electronic photodissociation spectrum of the protonated amino acid tyrosine are used to calibrate the setup for cooling, tagging, and spectroscopic capabilities. A vibrational temperature below 20 K is inferred for protonated tyrosine. The electronic spectrum of isolated protonated lumichrome, the smallest protonated flavin, is recorded in the visible range and assigned to the most stable N5 isomer by comparison with quantum chemical calculations. These results demonstrate the suitability of the BerlinTrap apparatus for spectroscopy and reactivity studies of small and large (bio-)molecular ions and their clusters. |
| Databáze: | OpenAIRE |
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