IRMPD in 3D Quadrupole Ion Trap

The room is equipped with a Paul trap mass spectrometer (Esquire Bruker 3000+) that has been extensively modified to couple with the CLIO free electron laser, an OPO/OPA tabletop laser, a CO2 laser, and an UV laser. An ion mobility device (DIMS) is also available on the ion trap. This setup allows for IR or UV spectra of ions to be derived, with isomeric forms separated by differential ion mobility beforehand. Ions are gas-phase ionized via an ESI source, and the ion trap is modified to introduce neutral molecules for ion-molecule reactions.

• • • • • • • • Characterization of reaction mechanisms via spectroscopy of reaction intermediates.
              • Characterization of products in a complex mixture.
              • Characterization of the nature of oxidation and fragmentation products of peptides.
              • Characterization of chiral discrimination phenomena in complexes through UV-induced photofragmentation.
              • Characterization of isomeric species within a mixture.
              • Study of ion-molecule reactions of interstellar interest.

• • • • • • • • Electrospray source
              • Solution concentration ~ 10^-5 to 10^-6 M, typically in a water:methanol mixture
              • Possibility of introducing solid, liquid, or neutral gas samples into the ion trap.

Infrared :

• • • • • • • • 5 to 20 µm (CLIO)
              • 2.5 to 5 µm (OPO/OPA)

UV : 266 nm (soon to be 213 and 355 nm)

• • • • • • • • Infrared-sensitive detectors:
              • OPO/OPA tabletop laser (2.5-5 µm)
              • UV laser (Litron) (@ 266 nm)
              • CO2 laser (10.6 µm)
              • Differential Ion Mobility Spectrometry (DIMS)