Laser ionization source for ion cyclotron resonance spectroscopy. Application to atomic metal ion chemistry

Novel product ions of 2‐aminoanilide and benzimidazole Ag(I) complexes using electrospray ionization with multi‐stage tandem mass spectrometry

“…In addition to the characteristic product ions described for the previous compounds (1a-4a), numerous ions were observed that represented 'cross-ring' fragmentation processes of the R 2 substituent, presumably due to competing protonation of the heteroatoms (either as a function of ionization or proton mobility initiated by collisional excitation). For compound 5a with a tetrahydropyran R 2 substituent, elimination of 72 u (tetrahydrofuran) from the R 2 substituent yielded a methylidene benzenaminium ion (m/z 163, C 9 A complete summary of the CID product ion spectra for the 2-aminoanilide compounds (1a-9a) is shown in Table 2.…”

“…These experiments have been conducted using various types of mass spectrometers, including ion cyclotron resonance spectrometers, simple beam instruments, multiple sector or quadrupole configurations, quadrupole ion traps and hybrid instruments (that combine different mass analyzers) . Metal ions have been generated through electron ionization of volatile organometallic compounds (e.g., iron pentacarbonyl), laser ablation of metal targets, and, more recently, through ion evaporation from solutions of suitable composition using electrospray ionization (ESI) . In addition to the exploration of intrinsic chemical properties, metal ions have also found utility in analytical applications like liquid chromatography (LC) as ionizing reagents for compounds that are insufficiently basic to be protonated under typical LC/ESI‐MS conditions, or in cases where protonation leads to undesirable dissociation reactions.…”

Off-line LDI-TOF-MS monitoring of simultaneous inorganic and organic reactions on particles levitated in a laboratory environment

“…These ions were also observed from the clean stainless steel plate using laser intensities > 495 J/pulse on the Perseptive Biosystems Voyager-DE. This grouping of background ions from a stainless steel plate has also been reported by Cody et al who also irradiated a stainless steel plate with the output of a nitrogen laser (Cody et al, 1980). The ions at m/z =87 and 89 are assigned as [Cr +35 Cl] and [Cr +37 Cl].…”

Resonant laser ablation as a selective metal ion source for gas-phase ion molecule reactions

“…An alternate mode for creation of gas-phase metal ions is through laser ablation of pure metal and mixed metal samples [20] directly within the storage cell of the mass spectrometer. Here, we define ablation as the direct generation of gas-phase ions that result from the laser-material interaction.…”