Infrared multiphoton dissociation spectroscopic analysis of peptides and oligosaccharides by using Fourier transform ion cyclotron resonance mass spectrometry with a midinfrared free-electron laser

Article Abstract:

The fragmentation of peptides and oligosaccharides in the gas phase is investigated by using electrospray ionization Fourier transform ion cyclotron resonance (FTICR) mass spectrometry coupled with dissociation by a laser-cleavage infrared multiphoton dissociation (IRMPD) technique. The gas-phase IRMPD spectra of protonated peptides and two sodiated oligosaccharides are obtained over the IR scan range of 5.7-9.5 microm.

Japan, Peptides, Spectra

---

White-light emission of amine-fictionalized organic/inorganic hybrids; emitting centers and recombination mechanisms

Article Abstract:

The recombination mechanisms and the chemical nature of the emitting centers subject to the white-light emission of sol-gel derived amine-functionalized hybrids lacking metal activator ions are discussed. Electron paramagnetic resonance data indicate that the specific photoluminescence (PL) mechanism subjacent to the component associated with the siliceous nanodomains involves oxygen-related defects.

Amines, Photoluminescence

---

Distinctive pressure effects on the association equilibrium in cyclodextrin group-inclusion complex as studied with electron paramagnetic resonance

Article Abstract:

The isomeric guest-host complexes formed by cyclic oligosaccharide cyclodextrin (CD) is studied. The changes in the equilibrium constants of these complexes are analyzed with the use of electron paramagnetic resonance (ERP).

Analysis, Isomerization

Similar abstracts:

• Abstracts: CO adsorption isotherms on ice by Fourier transform infrared spectroscopy and new insights of the ice surface from quantum ab initio investigations
• Abstracts: Raman spectroscopic studies of terthiophenes for molecular electronics. Characterization of the phase behavior and complexation in the heptanoic acid-heptylamine-water system
• Abstracts: Solvent effects on ultraviolet absorption and circular dichroic spectra of helical polypeptides and globular proteins. Calculation based on a lattice-filled cavity model
• Abstracts: Comparisons of measured rate constants with spectroscopically determined electron-transfer parameters. Extracting biochemical parameters for cellular modeling: A mean-field approach
• Abstracts: Cation distribution and size-strain microstructure analysis in ultrafine Zn-Mn ferrites obtained from acetylacetonato complexes

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.