0000000000661112

AUTHOR

Jari M. J. Nuutinen

showing 3 related works from this author

Mass spectrometric studies on small open-chain piperazine-containing ligands and their transition metal complexes

2001

Electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry was used to characterize the complexes formed between open-chain piperazine-containing ligands and transition metal salts (Cobalt, Copper, Zinc, and Cadmium as chlorides, nitrates, and acetates). Only single-charged complexes were observed, formed of one ligand (L) and mainly one metal ion (M). Since the net charge of the complexes was one, a counterion (X) was attached to some of the complexes, with formation of [L + M + X]+ complexes, and a proton was lost from others, as in [L − H + M]+ complexes. In most cases the composition of the complexes was more dependent on the ligand than the metal salt. Collisio…

Models Molecularchemistry.chemical_classificationSpectrometry Mass Electrospray IonizationFourier AnalysisLigandMetal ions in aqueous solutionInorganic chemistryMolecular ConformationCobaltLigandsPiperazinesFourier transform ion cyclotron resonanceNon-innocent ligandStructure-Activity RelationshipZincchemistry.chemical_compoundCrystallographychemistryTransition metalMetalsCarboxylateCounterionMetal aquo complexCopperSpectroscopyJournal of Mass Spectrometry
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Mass spectrometric studies of benzoxazine resorcarenes

2002

Eleven differently substituted 3,4-dihydro-2H-1,3-benzoxazine resorcarenes were studied by electrospray ionisation (ESI) and matrix-assisted laser desorption/ionisation (MALDI) mass spectrometry, using Fourier transform ion cyclotron resonance (FT-ICR) and time-of-flight (TOF) mass spectrometers, respectively. Under ESI conditions it was possible to transfer the intact resorcarenes from solution to the gas phase, yielding [M + H]+ and [M + 2H]+ ions as the main ions observed. Energy increase of the ions induced ready decomposition through successive eliminations of four CH2NR groups. Ion-molecule reactions showed that the ionising proton was situated somewhere inside the molecule and could …

Spectrometry Mass Electrospray IonizationElectrosprayChemistryOrganic ChemistryAnalytical chemistryResorcinolsMass spectrometryAlkali metalFourier transform ion cyclotron resonanceAnalytical ChemistryIonFragmentation (mass spectrometry)Spectrometry Mass Matrix-Assisted Laser Desorption-IonizationReagentOxazinesMoleculeSpectroscopyRapid Communications in Mass Spectrometry
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Mass spectrometric studies on pyridine-piperazine-containing ligands and their complexes with transition metals formed in solution.

2001

Electrospray ionization (ESI) and matrix-assisted laser desorption/ionization (MALDI) methods were used to study open-chain piperazine-containing ligands (L) and their complexes formed with transition-metal salts. ESI and MALDI measurements were performed with a Fourier transform ion cyclotron resonance (FT-ICR) and a time-of-flight (TOF) mass spectrometer, respectively. Only singly charged complexes, between one ligand and one or several metal ions, were formed in the ESI measurements. Because the net charge was always one, one or several counterions were attached to the complex. Under ESI conditions, the complexes formed between the ligands and metal (Co, Ni, Cu, and Cd) salts were [L + M…

inorganic chemicalschemistry.chemical_classificationCollision-induced dissociationLigandMetal ions in aqueous solutionElectrospray ionizationOrganic ChemistryAnalytical chemistryMass spectrometryFourier transform ion cyclotron resonanceAnalytical ChemistrychemistryPolymer chemistryQualitative inorganic analysisCounterionSpectroscopyRapid communications in mass spectrometry : RCM
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