Publication

Energy-dependent Electrospray Ionisation Mass Spectrometry of Carbonyl Clusters

Paul Joseph Dyson
2006
Journal Articles

Abstract

The electrospray ionisation mass spectra (EDESI-MS) of Ru6C(CO)16(PPh3) and Ir4(CO)11(PR3) (PR3 = PPh3, P(p-C6H4OMe)3, P(p-C6H4NMe2)3, P(p-C6H4Cl)3, P(OPh)3, P(OMe)3, PO3C5H9) are described and the relative importance of carbonyl loss vs. phosphine loss as a fragmentation pathway is assessed. Qual., the phosphine ligands bind more strongly to Ir4(CO)11 clusters than to Ru6C(CO)16. The influence on the collision cell pressure on MS/MS spectra of transition metal carbonyl cluster anions is also explored showing that a greater, simultaneous, distribution of fragment ions is produced as the collision cell pressure is increased.

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https://infoscience.epfl.ch/entities/publication/6eaa3e89-1332-4b8f-9620-7e6c9f539544

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Paul Joseph Dyson
2006
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/6eaa3e89-1332-4b8f-9620-7e6c9f539544

About this result

Related concepts (17)

Metal carbonyl

Metal carbonyls are coordination complexes of transition metals with carbon monoxide ligands. Metal carbonyls are useful in organic synthesis and as catalysts or catalyst precursors in homogeneous catalysis, such as hydroformylation and Reppe chemistry. In the Mond process, nickel tetracarbonyl is used to produce pure nickel. In organometallic chemistry, metal carbonyls serve as precursors for the preparation of other organometallic complexes.

Electrospray ionization

Electrospray ionization (ESI) is a technique used in mass spectrometry to produce ions using an electrospray in which a high voltage is applied to a liquid to create an aerosol. It is especially useful in producing ions from macromolecules because it overcomes the propensity of these molecules to fragment when ionized. ESI is different from other ionization processes (e.g. matrix-assisted laser desorption/ionization (MALDI)) since it may produce multiple-charged ions, effectively extending the mass range of the analyser to accommodate the kDa-MDa orders of magnitude observed in proteins and their associated polypeptide fragments.

Liquid chromatography–mass spectrometry

Liquid chromatography–mass spectrometry (LC–MS) is an analytical chemistry technique that combines the physical separation capabilities of liquid chromatography (or HPLC) with the mass analysis capabilities of mass spectrometry (MS). Coupled chromatography - MS systems are popular in chemical analysis because the individual capabilities of each technique are enhanced synergistically. While liquid chromatography separates mixtures with multiple components, mass spectrometry provides spectral information that may help to identify (or confirm the suspected identity of) each separated component.

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